T2000 internal hardware raid/cache

New T2000, Solaris 11/06, with 4 internal disks 0-4.
Ships with internal drives default cache: read=enabled, write=disabled for all 4.
(shown with format -e)
Planning on:
hardware mirroring OS disk (0 -> 1)
hardware mirroring 2nd set (2 -> 3)
1) Is it wise/safe to turn on write cache for OS mirrored disks?
Concerned if write cache will interfere in any way with expected operation of Solaris on the root disk. Or, possibly the swap partition.
2) Is it wise/safe to turn on write cache for 2nd mirrored disks?
2nd mirrored set will be used strictly for Oracle logging. Assume write cache will increase write-intensive logging effieciency with no 'ill' effects.
3) Both hardware mirroring and write cache are addressed seperately - but nothing exlains if they play nicely together. Is it safe to assume that the write cache doesn't interfere with the mirroring?
4) Does turning on internal disk hardware cache interfere with Solaris UFS logging?
Appreciate help!!

Similar Messages

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.

Partitoning a Hardware Raid

OK, I have already searched the net to no avail, im hoping someone here will be able to help me.
I currently have an external 300gb HD with 2 partitions, one is a bootable backup and the other is storage. I have recently realized that if this drive were to fail I would lose a ton of important data. I therefore have decided to create a raid setup. I am considering purchasing a Buffalo DriveStation Duo with 2 500GB drives in it. I would set this up in a RAID 1 array so I will have 500gb of usable space with a constant mirror image backup. My question is, can I partion the RAID into 2 partitions (as I have now with my 300 gb drive) one for a bootable backup and one for storage and still maintain the mirroring. In essence I want to have 1 drive with 2 partitions on it, and have the drive still be mirrored to the second drive.
First-Is this possible?
Second-Will I still be able to boot from the boot partition?
Three-If so, can having more than one partition on a raid create problems, such as increased disk failure, slower speeds, etc?
Thanks in advance to anyone that can help me with this!

Well, the reason that I wanted to do this raid array is because I store allot of files on my external drive that are not on my internal drive, therefore if my external drive were to fail my files would be gone for good. I also keep a bootable backup that I constantly recreate on a seperate partition of the external drive. I thought if I create the RAID then I would avoid loss of data in the event of a disk failure.
As far as using my current drive, I was going to upgrade the amount of storage that I had and set up the raid system at the same time, If I buy 2 500gb drives I will have 500gb of usable space instead of 300gb.
I am however unfamilier with OS X RAID software, is this the same as a "software raid" as I have heard that a software raid is much slower than a hardware raid because it uses you computers processer to mirror data rather than using a raid card in the enclosure.
As for cost, I can buy this drive station duo (does raid 0 and 1, has firewire 800, 400, and usb, and an internal hardware raid) with 2 preinstalled 500gb sata drives for $300. I thought that this was a pretty good price for what I am getting but I am very uneducated in all of this and could be very wrong.
If, like you said earlier, I can partiton the drives and then create a raid (with the harware raid and not need a "dual raid card" or whatever) I would do that. Are you saying that I would only be able to have the 2 raids required if I use the OS X software.
I guess my questions boil down to this
1. Is the OS X raid software considered a "software raid" and is it slower than a hardware raid? If so, by how much?
2. If its not any slower, What materials would you recomend to build this considereing I want 500gb of usable space rather than the old 300gb?
Also, if its not slower where is this software in the OS, Disk Utility? And how would I use it?
3. If this software way is slower then I would still want to use the hardware method that I have been pursuing, can I still make the partitions in advance and then make 2 raids or will this not work with the hardware method?

T2000 -Solaris 10 - Hardware Raid - Hot Spare

Hi,
i am setting up a t2000 server with Solaris 10. I have booted to single user mode through the network and am setting up the mirroring. (ie #raidctl -c c0t0d0 c0t1d0).
This has worked fine.
How does one go about setting up a disk to be a hot spare to this mirror. I found some docs on running raidctl -a set -g c0t3d0 c0t0d0 but the -a option no longer seems to be valid????
Is it possible to set up a hot spare like this?
Thanks,
Darren

The hardware raid supports either mirrors or stripes. I don't believe hot spare is an option. Typically you would use a hot spare for a raid 5 configuration. Check out this doc page for more info:
http://docs.sun.com/source/819-7990-10/ontario-volume_man.html#pgfId-1000514

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

Sun Fire T2000 boot from RAID

hi,
Sun Fire T2000, firmware 6.1.12
LSI 1064E firmware 1.0.40
hardware RAID for internal disks
sometimes server boots with trap, if :
it boots from raid and you tring to break and boot from cdrom:
{0} ok boot cdrom
Boot device: /pci@7c0/pci@0/pci@1/pci@0/ide@8/cdrom@0,0:f File and args:
Loading ufs-file-system package 1.4 04 Aug 1995 13:02:54.
FCode UFS Reader 1.12 00/07/17 15:48:16.
Redirected to slice: 1
Loading: /platform/SUNW,Sun-Fire-T200/ufsboot
Loading: /platform/sun4u/ufsboot
ERROR: /pci@780/pci@0/pci@9/scsi@0: Last Trap: Fast Instruction Access MMU Miss
[Exception handlers interrupted, please file a bug]
[type 'resume' to attempt a normal recovery]
{0} ok boot cdrom
SC Alert: Host System has Reset
SC Alert: Host system has shut down.

Worked for me .
( T2000 trying to boot from the net )
{0} ok boot net -s
Boot device: /pci@780/pci@0/pci@1/network@0 File and args: -s
100 Mbps full duplex Link up
Requesting Internet Address for 0:3:ba:d9:39:2c
Requesting Internet Address for 0:3:ba:d9:39:2c
ERROR: /pci@780/pci@0/pci@9/scsi@0: Last Trap: Fast Instruction Access MMU Miss
[Exception handlers interrupted, please file a bug]
[type 'resume' to attempt a normal recovery]
{0} ok printenv auto-boot? false
{0} ok reset-all
SC Alert: Host System has Reset
SC Alert: Host system has shut down.
Sun Fire T200, No Keyboard
Copyright 2006 Sun Microsystems, Inc. All rights reserved.
OpenBoot 4.20.4, 32760 MB memory available, Serial #64567596.
Ethernet address 0:3:ba:d9:39:2c, Host ID: 83d9392c.
{0} ok boot net -s
Boot device: /pci@780/pci@0/pci@1/network@0 File and args: -s
100 Mbps full duplex Link up
Requesting Internet Address for 0:3:ba:d9:39:2c
Requesting Internet Address for 0:3:ba:d9:39:2c
100 Mbps full duplex Link up
SunOS Release 5.10 Version Generic_118822-25 64-bit
Then came up ok .
Thanks

Solaris 10 X86 - Hardware RAID - SMC/SVM question...

I have gotten back into Sun Solaris System Administration after a five year hiatus... My skills are a little rusty and some of the tools have changed, so here is are my questions...
I have installed Solaris 10 release 1/06 on a Dell 1850 with an attached PowrVault 220v connected to a Perc 4 Di controller. The RAID is configured via BIOS interface to my liking, Solaris is installed and see's all my partitions which I created during install.
For testing purposes, the servers internal disk is used for the OS, the PowerVault is split into 2 RAID's - one is a mirror, one is a stripe...
The question is; do I manage the RAID using Sun Management Console and the tools OR do I use SMC?
When I launch SMC and go into Enhanced Storage... I do not see any RAID's... If I select "Disks" I do see them, but when I select them, it wants to run "FDISK" on them... now this is OK since they are blank but I want to ensure I am not doing sometinhg I should not be concerned with...
If the PERC controller is controlling the RAID, what do I need SMC for?

You can use SMC for other purposes but it won't help your with RAID.
Sol 10 1/06 has raidctl which handles LSI1030 and LSI1064 RAID�enabled controllers (from raidctl(1M)).
Some of the PERCs (most?) are LSI but I don't know if they are chipsets used by your PoweEdge (I doubt it).
Generally you can break it down like this for x86:
If you are using hardware RAID with Solaris 10 x86 you have to use pre-Solaris (i.e. on the RAID controller) managment or hope that the manufacturer of the device has a Solaris managment agent/interface (good luck).
The only exception to this that I know of is the RAID that comes with V20z, V40z, X4100, X4200.
Otherwise you will want to go with SVM or VxVM and manage RAID within Solaris (software RAID).
SMC etc are only going to show you stuff if SVM is involved and VxVM has its own interface, otherwise the disks are controlled by PERC and just hanging out as far as Solaris is concerned.
Hope this helps.

Software or Hardware RAID for LVM

Well, I've been looking into setting up a RAID for my home server. I've been trying to decide between a software raid or buying a relatively cheap SATA controller and using it for a hardware RAID. I'm trying to figure out the pros and cons of buying a cheap hardware card for use rather than simply using a software solution.
Are there any negatives to using LVM with either setup versus the other? Have software solutions become decent enough to be relied on?
If you recommend a hardware solution, a card suggestion would be appreciated. Preferably something under $50.. if that's even possible for a semi reliable card.
I'm also curious as to whether there would be an issue with software raid if it is run across multiple SATA controllers. Can you even run a single hardware RAID using 2 separate controllers?
Appreciate any advice!
EDIT: I'd also appreciate any information on the processor overhead of running a software RAID 5 with 5-6 disks. The home server is just an old Core2 and doesn't have all that much power to it.
Last edited by nedlinin (2012-01-05 00:35:03)

Anntoin wrote:
Stick with the software RAID, more flexible and probably more reliable. Hardware RAID only - arguably - becomes worth it if you have fancy stuff like a battery backed write cache, etc...
I'd avoid using RAID 5 and go for something like RAID 1+0, look up 'RAID 5 write hole'.
The processor overhead should be quite low even on a Core2.
The wiki has a bunch on info on RAID and LVM:
e.g. https://wiki.archlinux.org/index.php/So … ID_and_LVM
Appreciate the info. I've actually been reading over the RAID/LVM wiki over the past couple days making sure I get myself aligned to what needs to be done.
As far as avoiding RAID 5, I was specifically choosing it as it allows for some form of backup while giving me a large amount of hard drive space. I will be using 6x2TB drives in the array and using a RAID1 would end up giving me half of it usable, RAID5 giving me 10TB usable. Right now each of the drives are on their own so even with the write hole issues I'd assume I'd be better off with the RAID 5 then simply having the drives separate no?
I don't simply want to put all 6 drives into a LV as I'd be worried about one failing and losing more data than each drive on their own.

Macintosh shows only 150gbs free space,hardware raid is not found/properly installed.what should i do?i am using os x 10.6.8

i am currently having the problem of macbook pro having insufficient space.When i check my macintosh HDD,the devices indicated that there is only 150gb of free space.however,when i went to check "about this mac" on my top left hand corner of the desktop,i can not find any hardware raid.
anyone can provide a solution to this please?this macbook was reformatted and currently using OS X 10.6.8 and there is no more iOS for it to update already.

Please explain. What RAID? internal dual SSD? external ?
TimeMachine backup waiting to be copied?
MacBook Pro is here:
https://discussions.apple.com/community/notebooks/macbook_pro

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

Xserve G5 won't boot off Hardware RAID partition

I'm running an Xserve G5, 2.0 GHz single processor, OS X Server 10.4.5 with an Apple Hardware RAID card with 3 500GB drive modules in a RAID 5. The RAID is partitioned into two partitions, one for the system and one for data. After installing a video card, the Xserve will not boot off of the system partition on the RAID. It will boot just fine off a clone of that exact partition on a firewire drive, which is how I have it functioning at the moment. I have tried erasing the system partition on the RAID and re-installing the Server software but whenever I try to boot it it gives me the flashing folder Icon. I have tried resetting the NVRAM as well as restoring the functional backup of the system to no avail.
Any ideas? (I have run disk utility, DiskWarrior, repaired permissions etc.) I also checked the status of the RAID and it is in optimal condition. The data partition seems to be just fine and the system partition seems normal when booted from the external drive.
Xserve, Dual 2.7 G5, G4 Powerbook, many others Mac OS X (10.4.5)

Harry, I just saw your post. I went through the same pain last fall, and it WAS resolved through Apple Support, but you aren't going to like the solution. Simply as background, during the pre-deployment testing of our Xserve, we were having problems with the Apple BTO SCSI card (really, an LSI Logic 22320) and swapped it out with an ATTO UL4D. Something in the card removal/replacement caused our Apple Hardware RAID card to go into the same mode as yours, where it would work fine as a RAID 5 (two LUNs, 50 GB and 417 GB, over 3x250 GB ADMs) but would not boot. Apple Support and I concluded that something had become corrupted in the firmware or boot code on the Apple Hardware RAID card, but they did not have a file to use to flash it, so they swapped out the card under our support contract, and that fixed it. I still believe that, if I had had a file to flash the card with using the megaraid command, that the original card would have been fixed. FYI the new card has Firmware Version: A131, BIOS Version G117, the old card had Firmware Version: A130, BIOS Version G117. Completely unrelated to this, I've had a RADAR bug report (RADAR #4350243) open since last November that the Apple Hardware RAID card fails to fully flush its write caches on graceful power down. I've got a test case that is 100% reproducible, causes mystery garbage blocks from space. I'd suggest that you turn the write caches off on all LUNs on your Apple Hardware RAID card as a workaround until this is fixed. LSI Logic (the Apple Hardware RAID card is a rebranded LSI Logic card) found and fixed this bug on a later firmware rev from Apple's version. No update is available yet from Apple.
Xserve G5 Mac OS X (10.4.6)
Xserve G5 Mac OS X (10.4.6)

K8N Neo2-F Hardware RAID question

Hi guys,
Question for you. I have a Hitrachi 160GB SATA drive and I installed x64. After all is good and well I went out and got a second identical drive. I would now like to have these two drives Raided with the hardware raid. When I go into the RAID setup after POST, I can see both, add both, and mirror both. When I reboot, all I get is a post and it just stops after showing that box where it lists everything in the computer and what has what IRQ's. No error messages saying no boot drive, no system disk, etc. I switch it back and I can boot with the one drive. I also noticed during the RAID config, it asks me if I want to erase the drive. I always say no because I'm scared that it will erase the primary drive that I need to keep and not the new one for mirroring. Can anyone help me or confirm I'm doing this right. Thank you very much in advance.
Matt
-MSI K8N Neo2-F Socket 939 NVIDIA nForce3 Ultra ATX AMD Motherboard
-AMD 64 4200+ and fan/heatsink that came with it - NO OVERCLOCK (YET)
-2 - HITACHI Deskstar 7K250 HDS722516VLSA80 -13G0254 160GB 7200 RPM 8MB Cache Serial ATA150 Hard Drive
-CORSAIR XMS 1GB (2 x 512MB) 184-Pin DDR SDRAM Unbuffered DDR 400 (PC 3200) Dual Channel Kit System Memory
-ASPIRE ATX-AS520W BLACK ATX 520W Power Supply 115/230 V CB IEC 950/ TUV EN 60950/ UL 1950/ CSA 950
-Windows XP x64 SP1
-BFG GeForce 6800 GT AGP

You windows installation don't have the nvraid drivers loaded sou you won't be able to boot that windows installation
with the xp64 disk put in a enabled raid array .
But perhaps you can fool the system by doing this .
Leave the xp64 HD as is (just as a regular sata say at sata 1 )
Connect the new disk to the other sata controller , say sata 3 ( as they are controlled in pairs )
Set sata 3 as raid enabled and create a raid-1 array in the nvidia raidbios with just this single drive in it .
Boot windows xp64 from the normal enabled xp-HD and it should detect new hardware is added and ask for drivers .
Install the nvidia raid drivers and reboot when asked .
Then check if you have raid manager and raid drivers enabled in the windows installation .
After this point you can proceed to do the thing you first tried .(but without clearing the disk)
Delete the workaround fake raid you made with the new disk .
Shut down and move the hd-connectors again so that you have the two drives either at sata 1+2 or sata 3+4 .
Make a new array that includes the xp installation with only this disk in it , leave the other one free .
Try to boot the system .
If it boots you use nvraid manager in windows to add the second drive and let the array rebuild (sync drives )
Note that rebuilding take several hours to complete .
Look in the nvraid user guide for details .
To fully understand the nvidia raid it's wise to read this from start to finish a couple of times ,
and to have a hardcopy of it printed out.
A copy of the nvraid userguide rev.20 here :
ftp://ftp.tyan.com/manuals/m_NVRAID_Users_Guide_v20.pdf

Xserve G5 Hardware Raid Cable - Cable, SATA RAID Card

Anyone know were I can pick up 3 of the hardward raid cable's that are for the internal raid card? Cable, SATA RAID Card

When ours failed (became intermittent when disturbed), it was replaced by Apple Support under our Xserve AppleCare Maintenance Agreement - they overnighted one to me.
In case it helps, the Apple Support part number is 922-6343. the one that you DON'T want (the short cable that is removed when you have the Apple Hardware RAID) has the part number 922-6329. Any Apple service provider ought to be able to order one for you.
Russ
Xserve G5 2.0 GHz 2 GB RAM Mac OS X (10.4.8) Apple Hardware RAID, ATTO UL4D, Exabyte VXA-2 1x10 1u

XServe with hardware RAID card and headless install

Today, while trying to remotely install Mac OS X Server 10.4 ("Tiger") on an Apple XServe G5 with hardware RAID card, I discovered that it did not report the IP address of the server (booted from CD) with the sa_srchr command as it did with Mac OS X Server 10.3. With Mac OS X Server 10.3, I could boot the server from the CD, use the sa_srchr command from a remote machine to find the IP address, ssh into the server and user megaraid to create or recreate the RAID volumes using the internal drives in the server.
When I boot the XServe from the Mac OS Server 10.4 CD and run the sa_srchr command from a remote computer, I get "No Longer Used" in the place where the IP address should be (as it was in 10.3 Server and as it is described in the current, 10.4 Server, "Command Line Administration" manual).
Example: localhost#2xCPUFormat#No Longer Used #xx:xx:xx:xx:xx:xx#Mac OS X Server 10.4#RDY4PkgInstall#3.0#512
Just as an experiment, I threw the Mac OS X Server 10.4 DVD into an iMac G5 and booted it. Using the sa_srchr command, I get the same "No Longer Used" where the IP address should be.
Does anyone know:
Is this a problem with the original "Mac OS X Server 10.4.0" installation CDs? Do I need 10.4.1, 10.4.2 or 10.4.3 CD/DVD media?
Has this functionality been removed from Tiger install discs? Is there another way to create the RAID volumes?
I know that I can use the Mac OS X 10.3 Server disks to work around this, but it doesn't seem like I should have to...
Justin Sako
Leander ISD

Are you sure you have the 10.4 Admin Tools installed on the 'client' machine? I've seen this happen when trying to set up a 10.4 server from a machine with 10.3 Admin Tools installed. Try deleting the Admin Tools from your client machine, and re-install from a 10.4 DVD.
iBook G4 Mac OS X (10.4.3)

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)

T2000 internal hardware raid/cache

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