PCI ATA 66 Hardware RAID, follow up.

http://discussions.apple.com/thread.jspa?threadID=1015242&tstart=0
Just to recap, the problem that I was having in this archived post booting OS X from my 120GB+120GB hardware PCI ATA66 RAID0 drive, was in fact due to the <8GB partition limitation. XPostFacto doesn't enforce this on the PCI card, and it worked for a while with no helper, until after the 10.4.10 software update, which must have written some files past the 8GB portion of the drive. I can now still boot from my hardware RAID, I just have to use a helper in XPostFacto, like if you were booting a FW drive.

Just to clarify, I was talking about the ACARD ATA66RAID hardware RAID card, it works in OS9 or OSX, when you set the dip switch on the card to RAID 0 striping, the OS sees it as large SCSI drive, and you can optionally install the OS 9 drivers with Disk Utility in OS X, or initialize it in OS 9 with Drive Setup. First you have to initialize each drive individually in normal mode before setting the striping switch. Booting OS 9 has a volume size limitation, though, (<190GB or 200GB, not sure exactly) and my 120GB+120GB volume exceeds that.
I am using two individually cabled Master drives, I think you can also stripe two Slaves with this card, so then you could set up a software mirrored RAID with the two striped RAIDS, there's just not any more room in the G3 Desktop for any more drives though.
Probably not too many folks use those cards, the ACARD 6860M, they were a lot more expensive when they first came out, but you might find a good deal on one now. You can probably get better i/o peformance and larger max drive size from ATA-100, ATA-133 or SATA PCI cards, not sure of the latest price comparison on those.
From memory, the built-in ATA gets around 16MB/sec, the PCI66 can get around 40MB/sec and so can external FW, the ATA66RAID can get up to 60MB/sec. There's lots of variation in those numbers depending on usage. Not sure what numbers you get with ATA 100/133/SATA...those are also more $$$.

Similar Messages

  • PCI ATA 133 RAID Card VS. PCI ATA 133 Controller Card

    Hello,
    I just bought a 300gb HD to put into my QS. I know I need to add another ATA card, but I noticed in stores there is a PCI ATA 133 RAID and a PCI ATA 133 Controller card.
    What is the difference? The ATA 133 Raid card I saw is considerably cheaper. Can I use it to run my 300Gb drive as my startup drive (iDVD issues!)?
    Thanks for your help.

    Additional question: I have seen that there are a number of issues with SATA II drives in the early G5. Can you recommend a drive in the 500 GB range that would work well in the Dual 1.8 GHz? A SATA II would be a good option for the future... Thanks!

  • PCI ATA 66 RAID size limit?

    I was wondering what the max hard drive size is for a PCI ATA 66. And can you make a larger volume via RAID 0 that exceeds that limit? For example, can you combine two 120GB physical disks into a single RAID volume on the ATA66 interface, or will the combined RAID volume size also be limited to <137GB?
    On my system I use a single partition 120GB drive, and backup nightly with DejáVu to another 120GB drive, both are bootable 10.4 sytems. I am about 80% capacity now, and will be planning on adding some space in the future, so I was thinking about getting an external 250GB FW bootable drive for backup, and RAIDing the two 120GB drives into a single 240GB volume, if possible on a single cable on a PCI ATA 66 card.
    <br>
    G3 DT/SonnetEncoreZIFG4/1GHz/768MB/WingsAV/DVR-106D/psc750xi/graphire4-6x8   Mac OS X (10.4.8)   TempoUltraATA66/120GB Maxtor/120GB Seagate;TangoUSB/FW;ATI9200/204B/172N

    The article cited below states that the ATA drive size limit is 200 GB for your Mac.
    86178- Macintosh: Using 128 GB or Larger ATA Hard Drives
    The last reference it cites talks about Volume sizes, and that is the important distinction for RAID. With most RAID schemes, you are creating a larger (or mirrored) Volume out of two smaller Drives (or portions of Drives).
    I suggest you reconsider putting both drives on the same cable. Because of the way ATA/IDE works, there is NO Overlap in commands on a single cable. Each drive must initiate the seek, wait milliseconds for it to complete, and transfer the data in its entirety before any other transaction can begin on that cable. So one drive waits for the other to complete before it even starts its seek.
    Users at MacGurus who are posting their whiz-bang RAID performance numbers in their forum are all using SCSI (which supports overlapped commands and overlapped seeks) or have the two drives on two cables. This allows one seek to start, the other seek to start on the other drive, the wait for milliseconds to overlap each other, and then transfer1 followed by transfer2, or possibly even some overlap in the transfers.

  • Best protocol for dual booting on a hardware RAID 0 array?

    Hi folks. I would like to dual boot Windows 7 and Arch. I'll append the specs. I have a Terrabyte to split evenly between the two drives - each is 500G. Unless someone can come up with a reason and convince me otherwise, I want to do away with the RAID array. There's no redundancy anyhow and the speed I would lose breaking the array is negligible, therefore irrelevant.
    My issue is that I have a RAID 0 hardware array with Intel Rapid Storage Technology as the controller. The computer did NOT come with a Windows disk, but rather a recovery partition. It is my understanding that if I break the array, I will lose the recovery partition and will not be able to reinstall Windows - which I need. IF....the recovery partition can be unphased by breaking the array and I can use it to reinstall Windows, I would prefer that since I may need to recover Windows in the future. It's not a deal breaker if I can't keep the recovery partition, since I have the Windows key.
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    2. Break array, but do not alter BIOS to AHCI - leave as RAID.
    3. Restore Windows on one drive.
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    5. Configure GRUB.
    6. Smoke stogie or alternatively weep because I turned my computer into a brick.
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    ==================================================================================
    Specs:
    Processor: Intel(R) Core(TM) i7 CPU Q 740 @ 1.73GHz 1.73 Ghz: 8 Intel(R) Core (TM) i7 CPU q740 @ 1.73GHz
    Installed Memory: 8.00 GB RAM
    64 Bit Operating System
    Alienware M17X10
    Windows 7 Home Premium
    Performance Options: DEP turned on. Virtual Memory: 8180 MB
    Architecture: AMD64 Intel64 Family 6 Model 30 Stepping 5, GenuineIntel
    Computer: ACPI x64-based PC
    Display Adapters: 2 ATI Mobility Radeon HD 5800 Series
    DVD/CD-ROOM: HL-DT-ST DVDRWBD CA10N
    IDE ATA/ATAPI controllers: Ricoh PCIe Memory Stick Host Controller, Ricoh PCIe SD/MMC Host Controller, and Ricoh PCIe xD-Picture Card Controller
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    Imaging devices: Integrated Webcam
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    Monitor: Generic PnP Monitor
    Sound, video and game controllers: AMD High Definition Audio Device and High Definition Audio Device
    Storage Controllers: Intel(R) Mobile Express Chipset SATA RAID Controller

    I think the big thing will be backing up. I don't know anything about the two programs you would use, but I know that if I dd copy the disks, I would have to change the size of the partitions to match the size of the new partitions. IE: I have Arch installed on a RAID0 of 32GB each, and if I wanted to break my RAID and install on just one disk, I would have to shrink the size of my dd'ed copy to match the smaller drive.
    Otherwise, it looks like you have the right idea, or at least the right direction.

  • Wanted: Apple Hardware RAID Card for Xserve G5

    I have some questions regarding the original internal Apple Hardware RAID Card for an Xserve G5.
    1) Does it support native hardware RAID level 5?
    2) Does anyone know where I can find one of these cards? I can't even find them on eBay.
    3) I heard this card is based on an LSI board. Which model? Has anyone had success using the non-Apple version of the same model board in an Xserve G5 with internal Apple Drive Modules?
    4) How do you hook up this card? Do I put it in the PCI slot and move the SATA cables to it or does the presence of the card just automagically take over the drives?
    Thanks for all your help!

    I heard this card is based on an LSI board. Which model?
    Camelot is correct that this card is based on (is) the LSI Logic MegaRAID SATA 150-4 card:
    http://www.lsi.com/storagehome/products_home/internal_raid/megaraid_sata/megaraid_sata1504/index.html
    However, it has custom Apple Firmware to support booting by a PPC Xserve G5 rather than a PC. Apple also provides a ported version of the LSI Logic "megaraid" program to manage the card.
    There is a bug (well, at least one) in the Apple Firmware version that was fixed by LSI Logic in its PC version subsequent to Apple's branch off of the LSI Logic code tree for the firmware. Specifically, the card sometimes doesn't fully flush its write caches before it disconnects from the drive buses on graceful power down (doesn't happen on restart). Only known workaround is to turn off the write caches for all LUNs. I turned in a RADAR report (RADAR ID 4350243) under our support agreement back in November 2005, but no action since. I follow up every so often, but clearly this EOL product is not a priority.
    Has anyone had success using the non-Apple version of the same model board in an Xserve G5 with internal Apple Drive Modules?
    Won't work without the Apple firmware. Apple doesn't distribute the firmware. Been there, done that. Our Apple Hardware RAID card failed in an odd way shortly after installation - it still functioned as a RAID controller once booted from another drive, but you couldn't boot from it. believe that the firmware became corrupted, and that it could have been fixed by flashing the firmware using the "megaraid" program, but Apple Support didn't have a file to flash it with, so it was handled by an RMA exchange.
    RAID 5 performance is degraded with the write caches off, but our load is not heavy. I guess you could script the turning off and flushing of the write caches prior to shutdown, and turn them back on again during the boot sequence, but you'd really have to be careful to handle things like restart to CD boot, etc. We value our data more than speed.
    This was a very difficult bug to troubleshoot, because the RAID 5 made the mystery garbage blocks from space very hard to find repeatably. Finally came up with a repeatable test case. Fortunately, discovered while testing the Xserve prior to deployment, so no valuable data was lost.
    Russ

  • HELP! INTEL ICH5R Controller/S-ATA - "No RAID"

    Hi to all who gave me advice for setting up two S-ATA drives on the Intel ICH5R controller with "NO" RAID.  I really need some help.  
    Well, I got my two "NEW" S-ATA drives this afternoon and after following the advice given by several users in this thread, I'm having ptoblems trying to install Windows XP and I'm getting messages like "missing operating system", "Invalid system disk, (when XP CD is in CD drive) replace the disk and press any key", so I need some help please.
    Ok, I setup the BIOS settings in Integrated Perpherals/On-Chip IDE Configuration to:
    Mode: NATIVE
    ATA Configuration: S-ATA Only
    Keep S-ATA Enabled: YES
    Keep P-ATA Enabled: YES
    P-ATA Channel Selection: BOTH
    Configure S-ATA as RAID: NO
    BTW, given that I will have two Seagate S-ATA drives on SER1 & SER2 and one P-ATA drive (LG CDRW) on IDE1 as Master and the other P-ATA drive (LG DVD) on IDE2 as Master, I was just wondering if the "other options" in "On-Chip IDE Configuration" may be causing my problems and need to be altered and if so, what to?
    I.e. "Combined Mode Option" and S-ATA Ports Definition"
    I then switched off the computer and connected my two Seagate S-ATA drives
    (ST380013AS 7200.7 80GB on SER1 & ST3120026AS 7200.7 120GB on SER2).
    I turned on computer and drives were shown on POST screen as "Third IDE Master (80GB) and 4th IDE Master (120GB). I then entered BIOS to check if they were shown and they were and I selected the "ST380013AS 7200.7 80GB drive" as my 3rd boot device with the CD as my first boot device and the floppy as my second.
    BOTH drives were already set to "AUTO", but the label on the physical drives states that you should choose "AUTO" and enable "LARGE BLOCK ADDRESSING (LBA), but I could not see an option for this. I did not get any software with the disk but the drive label states that you chould use "Disc Wizard" but I did not have this so I used an updated Boot Floppy that works with drives up to 137GB. I FDISK'd the 80GB drive and formatted it to FAT32 (although I would not normally do this because XP setup always finds my new partitioned ATA133 drives and starts setup and then formats it).
    Note: During format, the drive was shown as "Formatting 10,780.56M" and for an 80GB drive, this did not seem right but after formatting, it showed as 76,297,91MB total disk space. FDISK showed the drive as 76,317MBytes.
    Also in the BIOS, the 80GB drive is shown with "CYLINDERS:38309", "HEADS:16", SECTORS:255", MAXIMUM CAPACITY:80GB and "WRITE PRECOMPENSATION:(nothing was shown for this - what is this and should there be a reading for it)?
    I then restarted the computer with the XP CD in the Master CD drive and the cd was found and showed "Press any key to continue......" but this was quickly followed by "Invalid System Disk - Replace the disk and press any key".
    I tried this many times but always get the same message. Can anyone who has setup S-ATA drives on ICH5R with "no RAID" and then installed a fresh copy of XP, please help, or anyone who can help with this, I would be very grateful.
    Regards
    Brave01Heart

    Hi
    Ok, I have some more information regarding the Intel ICH5R Controller and S-ATA drives.
    I tried your suggestions of " Both SATA+PATA in "On-Chip IDE Config"...." and also a few others, but it made no difference and I still got "invalid disk message".  Some changes like "P-ATA only" made my CDRW/DVD drives not show up during POST or in the BIOS or My Computer.
    I then used the original advice I was given:
    Mode: NATIVE
    ATA Configuration: S-ATA Only
    Keep S-ATA Enabled: YES
    Keep P-ATA Enabled: YES
    P-ATA Channel Selection: BOTH
    Configure S-ATA as RAID: NO
    but also changed "Combined Mode Option" to "S-ATA 1st Channel and the "S-ATA Ports Definition" to P0-1st. /P1-2nd.  I then inserted the XP CD and restarted the computer and this time XP installation went ahead without any 'invalid disk' messages and XP was installed without problems but I have noticed a few weird things which I would like some help with please, especially Q1:
    Q1:  During POST, both my S-ATA drives which are on SER1 & SER2, were shown as the Third and Fourth IDE Masters and as UDMA 5.  Surely this can't be correct?
    I know ATA133 is UDMA 6 and the S-ATA drives are supposed to run at 150Mb/sec but I don't know if there is a standard for that speed at the moment but it should not be shown as UDMA 5 on POST and also in Device Manager?  At the very least it should be UDMA 6?
    Q2:  In Device Manager/IDE ATA/ATAPI Controllers, it shows:
    Primary IDE Channel
      Device 0 Current Transfer Mode: Ultra DMA 5  (S-ATA 80GB Drive)
      Device 1 Current Transfer Mode: Not applicale
    Primary IDE Channel
      Device 0 Current Transfer Mode: Not applicable
      Device 1 Current Transfer Mode: Not applicable
    Secondary IDE Channel
      Device 0 Current Transfer Mode: Ultra DMA 5 (S-ATA 120GB Drive)
      Device 1 Current Transfer Mode: Not applicable
    Secondary IDE Channel
      Device 0 Current Transfer Mode: Ultra DMA 2 (LG CDRW Drive)
      Device 1 Current Transfer Mode: Ultra DMA 2 (LG DVD Drive)
    ??Standard Dual Channel PCI IDE Controller?
    ??Standard Dual Channel PCI IDE Controller?
    ?? After installing the Intel .INF Update, these entries changed to "Intel 82801EB Ultra ATA Storage Controllers".  With my two previous ATA133 drives installed in the same computer, there was only one "Intel 82801EB Ultra ATA Storage Controllers" in Device Manager, so with the S-ATA drives installed, why are there now two entries in Device Manager?
    Q3:  In "My Computer", the total capacity of my Seagate S-ATA 80GB drive is shown as 74.5GB (80,015,491,072 Bytes).  Iknow that the CMOS value is considerably less that the purchased disk size, but where has the other 4.5GB gone?
    Q4:  What is the purpose of the second "Primary IDE Channel" entry in Device Manager?  
    Regards
    Brave01Heart

  • Using a Mac Pro w / Apple Internal Hardware RAID Card?

    Anyone using a Mac Pro with a Apple Hardware RAID Card 2010?
    ( I have a 12 Core )
    Is it worth the $600-700 ?
    How much faster than the software RAID 0?
    I see Hamm's RAID tips chart .. but it doesn't include such options .. plus it is based on a PC system.
    Any tips would be great ..
    I find many areas where the application is slow / unresponsive .. and I'm not sure where the bottleneck is ... Maybe the hardware RAID will solve it?
    I'm really am impressed with CS5 .. it would be even better with some adjustments .. but I am absolutely disappointed with sluggish performance on my top-of-the-line Mac Pro 12 Core.
    This is not what I expected for a $8,000 machine.
    Some users says that the port of CS5 for the Mac has taken a back seat to the Windows version at Adobe.
    I can't imagine that Adobe would not put 100% effort into Mac products.
    Go Team!!!

    I have a 2009 Mac Pro 3.33GHz Quad core w/ Apple RAID card, 16GB RAM from OWC, and Apple's Radeon HD 5870 GPU.
    I have RAID 0 set across 3x1TB drives internally, and the standard 640GB drive for OSX and all program files. I set all video assets, renders, previews and such on the 3TB RAID.
    This seems to work wonderfully. I built this system specifically to edit a feature film shot on P2 DVCProHD, and I've been impressed with how it handles it. This was all built prior to CS5, which took me by surprise. Had I known nVidia would become such a problem for Apple, I would have built a PC, but that's another story.
    I just started a new project in CS5 on the same system, this time using H.264 video from my Nikon D7000, and so far, it seems to play just as nicely, despite not having hardware acceleration via CUDA technology. Yellow bars on top, even. I haven't had any problems with clips taking a long time to populate on the timeline or any of that, so perhaps the RAID card helps there.
    All this aside, I've already decided to upgrade my RAID for another reason. Right now, my backup is performed via an eSATA-connected external drive through a PCI eSATA card. After every edit session, I dump everything on the RAID onto the external drive, and it goes much faster than the old FW800 transfer used to. I'm about to replace my Apple RAID card with an Areca card and set up a 4-bay RAID 3 via an SAS connection. This will allow for excellent data throughput while offering more security than my current RAID 0 / manual backup system, and free up the internal drives for backups, exports and render files.
    I believe in hardware RAID, but I'm not as knowledgeable as Harm and others are about it. I had my Mac built to order with the Apple RAID card, so I have no experience using Premiere with a software RAID. Due to my smooth experience using it, I think it was worth it, but plenty of people say the Apple RAID card is rubbish, and to go with Areca or Atto cards. I didn't know about them until after I built my system, and even though it will cost a couple thousand to upgrade my RAID from this point, I expect to have an even better system than I already have.
    I hope this helps, and feel free to ask any questions I didn't address.

  • Problem with Installation on DELL Poweredge with Hardware RAID 1

    Hello Arch LInux community, 
    I am a newbee with good linux knowledge of working on linux but not much of systems administration. I am very much interested to install Arch Linux on my new desktop which is a Dell poweredge having hardware RAID 1(PERC .... controller). It has windows 7 OS on its first partition.
    I saw on the controller's BIOS menu that there are 2 1tb hard drives with something like --:--:00 and --:--:01 labels. And they were partitioned into two logical volumes which are visible once I boot into Arch linux live CD as, /dev/sda (about 250GB, and has windows OS on it) and /dev/sdb (about 700GB).
    Firstly, I am confused with the hard disk labels: even though they are logical partitions (i.e: combined by RAID 1, they are seen as /dev/sda and /dev/sdb). In the arch linux Beginner's wiki, there is some description on configuring for RAID, which included mdadm or mdadm_udev module specification. I did include these modules, and followed the installatin instructions carefully. I was trying to install on /dev/sdb, with the following partitioning:
    Sector map of partitions on /dev/sdb  : 1542848512 : 735.7 GiB
    Disk identifier (GUID) : 967BF308-6E5E-43AD-AB2E-94EB975C3603
    First usable sector = 34 Last usable sector  = 1542848478
    Total  free space is 2023 sectors
    Number        Start    End                  Size             Code    Name
                      34    2047                     FREE    
    1               2048    2099199        1024.0 MiB    EF00            EFI System
    2          2099200    2103295         2.0 MiB    EF02      BIOS boot partition
    3          2103296    2615295         250.0 MiB    8300      Linux filesystem
    4          2615296    212330495         100.0 GiB    8300     Linux filesystem
    5       212330496    317188095      50.0 GiB    8300     Linux filesystem
    6       317188096    1541924863    584.0 GiB    8300            Linux filesystem
         1541924864     1542848478                         FREE    
    The instruction on the Beginner's wiki is somewhat difficult to understand for beginners. Especially I wasn't sure whether to make EFI System partition and BIOS boot partition or just EFI system partition. So I made both as per the instructions.
    Is using UEFI compulsory, on UEFI based systems?
    A little bit more sub-headings or division of instructions, in the Beginner's wiki,  based on the usage scenarios can be very beneficial for newbees like me.
    I am finally getting the following error when I select the Arch Linux from the GRUB menu. Why it can't find the device?  I shall wait for your initial responses, and will give more specifics of my installation to find out any wrong step that I may have made.
    [ 0.748399] megasas: INIT adapter done
    ERROR: device 'UUID=40e603e9-7285-4ec8-8a06-a579358a52a0' not found. Skipping fsck
    ERROR: Unable to find root device 'UUID=40e603e9-7285-4ec8-8a06-a579358a52a0' .
    You are being dropped to a recovery shell
    Type 'exit' to try and continue booting
    Sh: can't access tty; job control turned off
    [rootfs /]#

    Well, you can see your RAID partitions and you're getting GRUB to load, and you are even being dropped to the recovery shell which means that the /boot partition is being found and is accessible. All vary, vary good things.
    I would boot into the Arch live CD/USB again. Then check the UUID of the / Root partition. To do this I just check the log listing of /dev/disk/by-uuid
    ls -l /dev/disk/by-uuid
    Hopefully the UUID for the /root partition in the /boot/grub/grub.cfg is incorrect, and all you need to do is change it from 'UUID=40e603e9-7285-4ec8-8a06-a579358a52a0' to the correct UUID.
    If the UUID is correct... then maybe the correct driver module is not complied into the initramfs. You could try adding that mdadm to the MODULES= list in /etc/mkinitcpio.conf then rebuild the initramfs again.
    mkinitcpio -p linux
    Hum..., the whole /dev/sda and /dev/sdb.... hum, You know... Maybe you need to change the line in /boot/grub/grub.cfg
    set root='hd1,msdos1'
    The hd1 is the equivalent to /dev/sda and the msdos1 is the equivalent of the First Partition i.e. /dev/sda1.. (note this is my disk yours may correctly have different numbers and not be a msdos partition)... owe wait... hum, you know I am fairly sure that like is really the root disk where the /boot partition is and has no relation to the / Root partition... Someone clear that up please.... It is hard for me to recall and I have my / Root parition encrypted, so It is hard for me to make heads or tails of that one right now, but that could be the problem too i.e. try changing hd1 to hd2 or hd0 or something.
    Owe, and it may be faster if you just make temporary corrections to the GRUB menu by hitting the "e" key on the menu entry you want to change then hit.. I think F10 to boot the modified entry. That way you don't need to keep booting into the Live CD/USB
    Last edited by hunterthomson (2012-09-20 05:52:33)

  • Systemd-fsck complains that my hardware raid is in use and fail init

    Hi all,
    I have a hardware raid of two sdd drives. It seems to be properly recongnized everywhere and I can mount it manually and use it without any problem. The issue is that when I add it to the /etc/fstab My system do not start anymore cleanly.
    I get the following error( part of the journalctl messages) :
    Jan 12 17:16:21 biophys02.phys.tut.fi systemd[1]: Found device /dev/md126p1.
    Jan 12 17:16:21 biophys02.phys.tut.fi systemd[1]: Starting File System Check on /dev/md126p1...
    Jan 12 17:16:21 biophys02.phys.tut.fi systemd-fsck[523]: /dev/md126p1 is in use. <--------------------- THIS ERROR
    Jan 12 17:16:21 biophys02.phys.tut.fi systemd-fsck[523]: e2fsck: Cannot continue, aborting.<----------- THIS ERROR
    Jan 12 17:16:21 biophys02.phys.tut.fi systemd-fsck[523]: fsck failed with error code 8.
    Jan 12 17:16:21 biophys02.phys.tut.fi systemd-fsck[523]: Ignoring error.
    Jan 12 17:16:22 biophys02.phys.tut.fi systemd[1]: Started File System Check on /dev/md126p1.
    Jan 12 17:16:22 biophys02.phys.tut.fi systemd[1]: Mounting /home1...
    Jan 12 17:16:22 biophys02.phys.tut.fi mount[530]: mount: /dev/md126p1 is already mounted or /home1 busy
    Jan 12 17:16:22 biophys02.phys.tut.fi systemd[1]: home1.mount mount process exited, code=exited status=32
    Jan 12 17:16:22 biophys02.phys.tut.fi systemd[1]: Failed to mount /home1.
    Jan 12 17:16:22 biophys02.phys.tut.fi systemd[1]: Dependency failed for Local File Systems.
    Does anybody undersand what is going on. Who is mounting the  /dev/md126p1 previous the systemd-fsck. This is my /etc/fstab:
    # /etc/fstab: static file system information
    # <file system> <dir> <type> <options> <dump> <pass>
    # /dev/sda1
    UUID=4d9f4374-fe4e-4606-8ee9-53bc410b74b9 / ext4 rw,relatime,data=ordered 0 1
    #home raid 0
    /dev/md126p1 /home1 ext4 rw,relatime,data=ordered 0 1
    The issue is that after the error I'm droped to the emergency mode console and just pressing cantrol+D to continues boots the system and the mount point seems okay. This is the output of 'system show home1.mount':
    Id=home1.mount
    Names=home1.mount
    Requires=systemd-journald.socket [email protected] -.mount
    Wants=local-fs-pre.target
    BindsTo=dev-md126p1.device
    RequiredBy=local-fs.target
    WantedBy=dev-md126p1.device
    Conflicts=umount.target
    Before=umount.target local-fs.target
    After=local-fs-pre.target systemd-journald.socket dev-md126p1.device [email protected] -.mount
    Description=/home1
    LoadState=loaded
    ActiveState=active
    SubState=mounted
    FragmentPath=/run/systemd/generator/home1.mount
    SourcePath=/etc/fstab
    InactiveExitTimestamp=Sat, 2013-01-12 17:18:27 EET
    InactiveExitTimestampMonotonic=130570087
    ActiveEnterTimestamp=Sat, 2013-01-12 17:18:27 EET
    ActiveEnterTimestampMonotonic=130631572
    ActiveExitTimestampMonotonic=0
    InactiveEnterTimestamp=Sat, 2013-01-12 17:16:22 EET
    InactiveEnterTimestampMonotonic=4976341
    CanStart=yes
    CanStop=yes
    CanReload=yes
    CanIsolate=no
    StopWhenUnneeded=no
    RefuseManualStart=no
    RefuseManualStop=no
    AllowIsolate=no
    DefaultDependencies=no
    OnFailureIsolate=no
    IgnoreOnIsolate=yes
    IgnoreOnSnapshot=no
    DefaultControlGroup=name=systemd:/system/home1.mount
    ControlGroup=cpu:/system/home1.mount name=systemd:/system/home1.mount
    NeedDaemonReload=no
    JobTimeoutUSec=0
    ConditionTimestamp=Sat, 2013-01-12 17:18:27 EET
    ConditionTimestampMonotonic=130543582
    ConditionResult=yes
    Where=/home1
    What=/dev/md126p1
    Options=rw,relatime,rw,stripe=64,data=ordered
    Type=ext4
    TimeoutUSec=1min 30s
    ExecMount={ path=/bin/mount ; argv[]=/bin/mount /dev/md126p1 /home1 -t ext4 -o rw,relatime,data=ordered ; ignore_errors=no ; start_time=[Sat, 2013-01-12 17:18:27 EET] ; stop_time=[Sat, 2013-
    ControlPID=0
    DirectoryMode=0755
    Result=success
    UMask=0022
    LimitCPU=18446744073709551615
    LimitFSIZE=18446744073709551615
    LimitDATA=18446744073709551615
    LimitSTACK=18446744073709551615
    LimitCORE=18446744073709551615
    LimitRSS=18446744073709551615
    LimitNOFILE=4096
    LimitAS=18446744073709551615
    LimitNPROC=1031306
    LimitMEMLOCK=65536
    LimitLOCKS=18446744073709551615
    LimitSIGPENDING=1031306
    LimitMSGQUEUE=819200
    LimitNICE=0
    LimitRTPRIO=0
    LimitRTTIME=18446744073709551615
    OOMScoreAdjust=0
    Nice=0
    IOScheduling=0
    CPUSchedulingPolicy=0
    CPUSchedulingPriority=0
    TimerSlackNSec=50000
    CPUSchedulingResetOnFork=no
    NonBlocking=no
    StandardInput=null
    StandardOutput=journal
    StandardError=inherit
    TTYReset=no
    TTYVHangup=no
    TTYVTDisallocate=no
    SyslogPriority=30
    SyslogLevelPrefix=yes
    SecureBits=0
    CapabilityBoundingSet=18446744073709551615
    MountFlags=0
    PrivateTmp=no
    PrivateNetwork=no
    SameProcessGroup=yes
    ControlGroupModify=no
    ControlGroupPersistent=no
    IgnoreSIGPIPE=yes
    NoNewPrivileges=no
    KillMode=control-group
    KillSignal=15
    SendSIGKILL=yes
    Last edited by hseara (2013-01-13 19:31:00)

    Hi Hatter, I'm a little confused about your statement not to use raid right now. I'm new to the Mac, awaiting the imminent delivery of my first Mac Pro Quad core with 1tb RAID10 setup. As far as I know, it's software raid, not the raid card (pricey!). My past understanding about raid10 on any system is that it offers you the best combination for speed and safety (backups) since the drives are a striped and mirrored, one drive dies, quick replacement and you're up and running a ton quicker than if you had gone RAID5 (20 mins writes per 5G data?)Or were you suggesting not to do raid with the raid card..?
    I do plan to use an external drive for archival backups of settings, setups etc, because as we all know, if the best fool proof plans can be kicked in the knees by Murhpy.
    My rig is destined to be my video editing machine so the combo of Quad core, 4G+ memory and Raid10 should make this quite the machine.. but I'm curious why you wouldn't suggest raid..
    And if you could explain this one: I see in the forums a lot of people are running Bootcamp Parralels(sp) which I assume is what you use to run mulitple OS on your Mac systems so that you can run MacOS and Windblows on the same machine.. but why is everyone leaning towards Vista when thems of us on Windblows are trying to avoid it like the plague? I've already dumped Vista from two PCs and installed XP for a quicker less bloated PC. Is vista the only MSOS that will co-exist with Mac systems? Just curious..
    Thanks in advance.. Good Holidays

  • Some configurations such as a software or hardware RAID do not support a recovery partition and can't be used with Find My Mac.

    I'm getting the following error message when attempting to invoke "Find My Mac"
    Some configurations such as a software or hardware RAID do not support a recovery partition and can't be used with Find My Mac.

    You have no recovery partition. This is a normal condition if your boot volume is a software RAID, or if you modified the partition table after running Boot Camp Assistant to create a Windows partition. Otherwise, you need to reinstall OS X in order to add a recovery partition.
    If you don't have a current backup, you need to back up before you do anything else.
    You have several options for reinstalling.
    1. If you have access to a local, unencrypted Time Machine backup volume, and if that volume has a backup of a Mac (not necessarily this one) that was running the same major version of OS X and did have a Recovery partition, then you can boot from the Time Machine volume into Recovery by holding down the option key at the startup chime. Encrypted Time Machine volumes are not bootable, nor are network backups.
    2. If your Mac shipped with OS X 10.7 or later preinstalled, or if it's one of the computers that can be upgraded to use OS X Internet Recovery, you may be able to netboot from an Apple server by holding down the key combination option-R  at the startup chime. Release the keys when you see a spinning globe.
     Note: You need an always-on Ethernet or Wi-Fi connection to the Internet to use Recovery. It won’t work with USB or PPPoE modems, or with proxy servers, or with networks that require a certificate for authentication. 
    3. Use Recovery Disk Assistant (RDA) on another Mac running the same major version of OS X as yours to create a bootable USB device. Boot your Mac from the device by holding down the option key at startup.Warning: All existing data on the USB device will be erased when you use RDA.
    Once you've booted into Recovery, the OS X Utilities screen will appear. Follow the prompts to reinstall OS X. You don't need to erase the boot volume, and you won't need your backup unless something goes wrong. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade, so make a note of those before you begin.
    If none of the above choices is open to you, then you'll have to start over from an OS X 10.6.8 installation. There's no need to overwrite your existing boot volume; you can use an external drive. Install 10.6 from the DVD you originally used to upgrade, or that came with the machine. Run Software Update and install all available updates. Log into the App Store with the Apple ID you used to buy 10.7 or later, and download the installer. When you run it, be sure to choose the right drive to install on.

  • Solaris Volume Manager or Hardware RAID?

    Hi - before I build some new Solaris servers I'd like thoughts on the following please. I've previously built our Sun servers using SVM to mirror disks and one of the reasons is when I O/S patch the server I always split the mirrors beforehand and in the event of a failure I can just boot from the untouched mirror - this method has saved my bacon on numerous occasions. However we have just got some T4-1 servers that have hardware RAID and although I like this as it moves away from SVM / software RAID and to hardware RAID I'm now thinking that I will no longer have this "backout plan" in the event of issues with the O/S updates or otherwise however unlikely.
    Can anyone please tell me if I have any other options?
    Thanks - Julian.

    Thanks - just going through the 300 page ZFS admin guide now. I want to ditch SVM as it's clunky and not very friendly whenever we have a disk failure or need to O/S patch as mentioned. One thing I have just read from the ZFS admin guide is that:
    "As described in “ZFS Pooled Storage” on page 51, ZFS eliminates the need for a separate volume
    manager. ZFS operates on raw devices, so it is possible to create a storage pool comprised of
    logical volumes, either software or hardware. This configuration is not recommended, as ZFS
    works best when it uses raw physical devices. Using logical volumes might sacrifice
    performance, reliability, or both, and should be avoided."
    So looks like I need to destroy my hardware RAID as well and just let ZFS manage it all. I'll try that, amend my JET template and kick of an install and see what it looks like.
    Thanks again - Julian.

  • Can I make a hardware raid with the on board Marvell SE9128 chip on p67a-gd65?

    Hi,
    as you all know the RAID 0/1/10/5/JBOD with the p67 chipset are pure software raids or "fake" raids. I saw some sata-raid pcie 2.0 x1 cards on the sell which have the Marvell SE9128 chip. So my question is: Can I make a hardware raid with the onboard Marvell SE9128 chip on the p67a-gd65?
    Thanks
    --pepe

    Quote from: Stu on 06-November-11, 02:31:26
    Hardware RAID explained:
    http://www.pcguide.com/ref/hdd/perf/raid/conf/ctrlHardware-c.html
    What do you want to say with this? I know what's the difference between a software (fake) and hardware raid? Your post doesn't answer the question. The p67-chipset has integrated software raid. The marvell se9128 is also found on some hardware raid cards. That's why I'm still wondering if it is for a hardware raid on this board or not.

  • X4200 hardware raid not syncing

    I got a x4200 with a RAID 1 configuration. Had a bad disk. Saw this in /var/adm/messages:
    Mar 22 17:37:00 vps3      Physical disk (target 1) is |missing|
    Mar 22 17:37:00 vps3      Physical disk (target 1) is |out of sync||missing|
    raidctl -S too showed a failed disk:
    c0t0d0               67.9G     N/A     DEGRADED OFF     RAID1
              0.0.0     67.9G          GOOD     
              N/A     67.9G          FAILED     
    So, I took it out and then replaced it with a new disk. This is what is being shown in the logs:
    Mar 23 20:25:22 vps3      Physical disk (target 1) is |out of sync||online|
    However, instead of showing a SYNC status, why does it just say DEGRADED but both disk are good:
    root@vps3:/# /usr/sbin/raidctl -l c0t0d0
    Volume               Size     Stripe     Status     Cache     RAID
         Sub               Size               Level
              Disk                         
    c0t0d0               67.9G     N/A     DEGRADED OFF     RAID1
              0.0.0     67.9G          GOOD     
              0.1.0     67.9G          GOOD     
    I am wondering if this command is just lieing to me? How can I ensure the RAID is working properly at this point? What is the best way to delete 0.1.0 device and replace it again?
    Thanks

    midhu wrote:
    Hardware RAID is configured in one of the new T3-1B blade server from ok prompt and I am able to see the details using show-volumes from ok prompt. But from Solaris OS it is not visible using raidctl -l command. It doesn't return anything. Is there any way to check the RAID status from OS. Making the OS down is not an option everytime.
    # echo|format
    Searching for disks...done
    AVAILABLE DISK SELECTIONS:
    0. c0t3CF77D9D2CF0BA99d0 <LSI-LogicalVolume-3000 cyl 65533 alt 2 hd 64 sec 139>
    /pci@400/pci@1/pci@0/pci@2/LSI,sas@0/iport@v0/disk@w3cf77d9d2cf0ba99,0
    Specify disk (enter its number): Specify disk (enter its number):
    # raidctl -l
    Edited by: midhu on Jan 26, 2013 5:30 AMYour server seems a little confused as to whether it is a T3 or T4, as you reference T4 in the title and T3 in the body.
    raidctl may not be the correct utility because either:-
    - (1) A different utility is now needed to configurare the raid for these onboard controllers on newer tin.
    or
    - (2) You are using an add in raid card that requires different software:
    Please see for example: http://docs.oracle.com/cd/E22985_01/html/E22986/z40001e11389320.html

  • I need help on how to setup hardware raid for ASM.

    In the « Recommendations for Storage Preparation” section in the following documentation: http://download.oracle.com/docs/cd/B28359_01/server.111/b31107/asmprepare.htm
    It mentions:
    --Use the storage array hardware RAID 1 mirroring protection when possible to reduce the mirroring overhead on the server.
    Which is a good raid 1 configuration considering my machine setup?
    “I put my Machine info below.”
    Should I go for something like:
    5 * raid 1 of 2 disks in each raid: disk group DATA
    5 * raid 1 of 2 disks in each raid: disk group FRA
    Then ASM will take care of all the striping between the 5 raids inside a disk group right?
    OR, I go for:
    1 * raid 1 of 10 disks: disk group DATA
    1 * raid 1 of 10 disks: disk group FRA
    In the second configuration, does ASM recognize that there are 10 disks in my raid configuration and stripes on those disks? Or to use ASM striping, I need to have lots of raid in a disks group?
    Here is my Machine Characteristics:
    O/s is Oracle Enterprise Linux 4.5 64 bit
    Single instance on Enterprise Edition 10g r2
    200 GIG database size.
    High "oltp" environment.
    Estimated growth of 60 to 80GIG per year
    50-70GIG archivelogs generation per Day
    Flashback time is 24 hours: 120GIG of flashback space in avg
    I keep a Local backup. Then push to another disk storage, then on tape.
    General Hardware Info:
    Dell PowerEdge 2950
    16 GIG RAM
    2 * 64 bit dual core CPU's
    6 * local 300G/15rpm disks
    Additional Storage:
    Dell PowerVault MD1000
    15 * 300G/15rpm Disks
    So I have 21 Disks in total.

    I would personally prefer the first configuration and let ASM stripe the disks. Generally speaking, many RAID controllers will stripe then mirror (0+1) when you tell it to build a striped and mirrored RAID set on 10 disks. Some will mirror then stripe (1+0) which is what most people prefer. That's because when a 1+0 configuration has a disk failure, only a single RAID 1 set needs to be resync'd. The other members of the stripe won't have to be resynchronized.
    So, I'd prefer to have ASM manage 5 luns and let ASM stripe across those 5 luns in each disk group. It also increases your ability to reorganize your storage if you need 20% more info in DATA and can afford 20% less in FRA, you can move one of your RAID 1 luns from FRA to DATA easily.
    That's my 0.02.

  • If you replace raid controller of hardware raid do you have to rebuild raid from beginning or not?

    hi,
    I like to know if the raid controller is damaged and you replace it with a  raid card in a PCI slot .do you have to rebuild the raid from begin if it is hardware raid ?
    the same  question I ask for software raid ? this question is for raid 0,1,5,6,ect.
    if you have to rebuild  from begin then it means if you don't have good back-up then the data is gone!
    thanks
    johan
    h.david

    Hello,
    Enterprise controllers will read the metadata of the array, as it's stored on the disks, and recognize the configuration. Then you and you can choose to 'mount' it or create
    a new array.
    But, I suggest you to go to the manufacturer of the controller and get detailed information for scenarios like that.
    For software raid, the only experience I have is that Windows can recognize a set of drives when they are configured as Dynamic Disks.
    best regards
    jesper vindum, denmark

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