Raid 1 and JBOD?

HiWill the EX4100 support 2 different setups. eg I'd like Raid1 on 2x 6TB drives, and then 2 separate drives either as individual or JBOD (I will be adding the 2 separates drives at a later date) Thanks In Advance

Sharkey63rd wrote:
HiWill the EX4100 support 2 different setups. eg I'd like Raid1 on 2x 6TB drives, and then 2 separate drives either as individual or JBOD (I will be adding the 2 separates drives at a later date) Thanks In AdvanceYes, you can start with 2 drives and setup as RAID 1/0 or JBODs. Later, you can add a drive or two more drives to setup as JBODs or RAID 1/0 on those two new drives.

Similar Messages

RAID set and JBOD on same controller card?

I'm planning to update my RAID from the current 4-disc software 0 in my MacPro to a RAID 5 with dedicated controller (for now) and here's what I'm planning (tentatively)
• RAID 5 consisting of 8 discs, 4 inside 5.1 MacPro with MaxUpgrade's kit in use for SAS connectivity , and 4 more discs in a 1U rackmount SAS chassis, possibly OWC's new 'trayless' unit, or another similar chassis.
• Areca RAID controller ARC-1880ix-12 is what I'm leaning towards at this time.
I don't have the cash or demand (yet) for a system in a huge expansion chassis and 24 drives, but my the main thing I want to know, (since I've never had this many discs to play around with before) is when I create an 8 disc RAID 5 Array for storage, can I also connect another external chassis to the controller as a JBOD unit and have those drives therein function independently, with swap capability of single volumes? This would be very handy for individual cleint-drive backups and would free up my eSATA interface for file ingest and more flexibility.
I do know I would have to get an adapter to run more than one external SAS connection cause the Card only has one External SAS port as is. I may go with a different card with more channels for more future expansion, but it will more than likely have more internal ports than external.

l_elephant wrote:
your system is on that RAID0?
do you regularly clone your system, for when, (not in case), the RAID0 fails?
Yes, when working I backup the data ideally after every time I add footage to the RAID, if not at least once daily.
have you considered the added security of RAID6 (if your going to have that many drives . . .)
I have, and it will probably be the next step if I go to a RAID larger than 8 discs. IF I do start getting the need for 16+ I may go to a RAID 10.
when you mean storage, do you mean like archival, past projects type storage, or current working projects drive space?
Working projects. Also will look into LTO for archival in the future if the demand necessitates it.
can I also connect another external chassis to the controller as a JBOD unit and have those drives therein function independently, with swap capability of single volumes?
yes
Thank you, this is the main question I had, do you have a specific experience such as this you would share?
I do know I would have to get an adapter to run more than one external SAS connection cause the Card only has one External SAS port as is. I may go with a different card with more channels for more future expansion, but it will more than likely have more internal ports than external.
you're describing SAS expander. You can easily have more than 200 drives connected.
No I'm describing a PCI plate SFF-8087 to SFF-8088 Adapter, like this one:
http://www.pc-pitstop.com/sascablesadapters/AD8788-4.asp
Like I said, most of the cards I'm looking at have more internal 8087 ports than the external 8088 ports.
what kind of work are you doing? Vidéo, audio? One project at a time, or parallel projects? Alone or with others (colleagues, employees)? The Caldigit system looks nice for large teams of people.
This would be a mobile installation, with me as a single operator handling digital video footage, so this would be direct attached storage, no network interface necessary. Usually one project at a time, but if I get busier hopefully more than one.

Ex4100 2 Drives Raid 1 and one single disk

Hi I've ordered a wd ex4100 , with 2x wd red 2tb drives and 1x wd red 4TB drives
I wanted to set them up as the 2x 2tb drives in raid 1 and the single 4tb drive just on its own , not in any raid , with the 4th bay spare , is any of this possible?

destix wrote:
Hi I've ordered a wd ex4100 , with 2x wd red 2tb drives and 1x wd red 4TB drives
I wanted to set them up as the 2x 2tb drives in raid 1 and the single 4tb drive just on its own , not in any raid , with the 4th bay spare , is any of this possible?It is possible. Just insert the two (2TB) in to slot 1 & 2 and configure RAID 1. After configure RAID 1 done, then insert (4TB) in to slot 3 and configure JBOD.

Storage 3310 RAID array as JBOD

Hi,
I have Storage 3310 RAID array. I want to use it as JBOD, half of the disks connected to
one controller channel, the other half to other controller channel.
I connected cables as it's is shown on FIGURE 4-16 (http://docs.sun.com/source/816-7290-19/ch04_cable.html#pgfId-999796)
but without expansion unit and with one host.
Seems that's not ok since disks are not recognize by format command.
There was RAID 5 was configured. I erased it. What should be configured at storage?
Thanks
Mario

AFAIK that's not the question. The question is can we convert (from a H/W standpoint) a RAID array to JBOD. And the answer is no.
You can use NRAID, but this remains a 3310 RAID array. BTW, please have a look at http://dlc.sun.com/pdf/817-3711-17/817-3711-17.pdf page 100:
"Note NRAID does not provide data redundancy. The NRAID option that appears
in some firmware menus is no longer used and is not recommended. "
Nicolas

Mac Pro RAID Card and Western Digital drives

I'm having huge troubles with these items.
I first installed four WD7500AYYS (Raid Edition) to build a RAID 5 and install Leopard on it. At this point, one of the drives was probably DOA and didn't show up in the bay. I then reinstalled the Seagate that shipped with the machine, then proceeded to create another enhanced JBOD raid with one of the WD drives. After a couple of seconds, RAID utility reported an error (disk about to fail and such). I then tried with another one. The process ended with a kernel panic after two hours, while RAID utility was still marking the drive for enhanced JBOD. That disk never show up again, in any bay.
At this point, I'm left with two WD drives. I can't get past the creation of a RAID set with them, no matter what. Either RAID utility reports an error, or it says the disk has been ejected, or it keeps create the RAID for hours... The later usually ends with a "force quit", or a force shutdown. During these attemps, the RAID card went missing once, then it appeared again on the following reboot. The RAID battery, which was fully charged at first, is now being "repaired" (charging ?).
I then ran AHT to see whether there was something wrong. No errors reported.
Because all four drives were Raid Edition, I thought this could be the root of the problems. So I bought a Caviar SE16 (WD5000AAKS). To no avail. It fails too, in the very same way. And now it no longer appears in any bay.
The last step I took was to remove the RAID card (connecting the iPass connector to the motherboard). Out of the five WD drives, only two RE2 (the two that still show up with the RAID card) do appear in disk utility. But disk utility never ends "writing the partition map" or "preparing for initialization".
By now, I end up with five WD drives that appear to be just dead, as if they were killed by the RAID card trying to RAID them. The only drive that works, with or without the RAID card, in any bay, is the Seagate. I didn't try to fiddle with it though (I'm reluctant to format it just to see whether I can create an enhanced JBOD raid with it).
So the question is, are Western Digital drives compatible with this RAID card ? If they do, then how a RAID card can kill them in such a way while keeping the Seagate alive ?
I'm lost in conjectures. I don't even know if/how I can bring all the WD drives back to life. I'm not sure the RAID card is faulty, I've already lost a lot of time and money, I'm not willing to buy yet another drive to see it fail too, and my Mac Pro is kind of useless as I don't want to spend time on installing/configuring everything I need on a drive that is bound to be replaced by a larger RAID 5 array.
Any help is appreciated. Thank you.

Someone yesterday or Friday, had a system with 4 x 1TB drives and Pro RAID, but in their case, it was determined later Saturday that drive bay #1 was not functioning.
Hopefully these fully retail drives, not OEMs, and I would think they are fine. They are what I would use (Sonnet Tempo only supports RE of the WD drives). Someone else, Danish?, had 3 out of 4 WD drives were DOA.
I've never had trouble buying over a dozen from OWC, so it does seem odd.
If you have SoftRAID 3.6.6 I would use that to zero the first and last 100 sectors, or you can begin to zero the whole drive and cancel at any time, just to check the health of the drive and that it can zero and not produce I/O errors.
There are two other methods for accessing and managing Mac Pro RAID, ARD and CLI
http://docs.info.apple.com/article.html?artnum=306231
Originally, only Apple drives were supported. My understanding was that this changed. But the only article I found in KB dates back to Aug '07:
Question: What drives does Apple support with the Mac Pro RAID Card and the Xserve RAID Card?
Answer: +Only Apple drives are supported with the Mac Pro RAID Card and the Xserve RAID Card.+
My understanding that 3rd party retail drives such as WD RE2 750GB, Seagate, Hitachi were supported as well since the article was written - and I can't find where I read that, but sure that I did, as this was discussed in the past.
I'd like to find an official article. Even my friend Google was helpless

Revert RAID 6 to JBOD

Hello,
How does one revert a RAID configuration to JBOD? I have an NSS326 running as RAID 6, and need to change to JBOD, and I
dont see, and haven't read where it's possible to change a RAID config back to JBOD. Data retention is not an issue.
Thank you
-John

I tired the "Remove Now" button for the RAID volume in "Volume Management" once before, and nothing happened. I tried again today after rebooting the NAS, and the RAID config has been removed.
Issue resolved

Is there a way to run a external ssd with my mid 2011 iMac hdd in a raid configuration and basically have a fusion drive

is there a way to run a external ssd with my mid 2011 iMac hdd in a raid configuration and basically have a fusion drive

A Fusion Drive is not a RAID; it's a CoreStorage logical volume group. While it's technically possible to do as you suggest, there would be little or no benefit from it.

SATA Raid 0 and Overclocking Issues. Help!

I'm building out a machine that doesn't seem to want to overclock in the slightest bit. I think my Serial ATA RAID 0 array seems to be the problem with OC'ing. Each time I change the CPU FSB settings, when I boot up, it tries to detect my array. Then it reboots after it fails.
Does anyone know what's going on? Someone mentioned PCI Bus settings to me...???
On Anandtech they OC'd this chip to 2.6 Ghz (290x9) with an 8.3%+ in voltage. I can't even get to 220.
Any help would be much appreciated.
Thanks!
======================
System Setup:
Athlon 64 3000+ Socket 939
K8N Neo2 Platinum
2 Hitatchi 80 gig SATA HD's
Leadtek Winfast 6600 GT (AGP)
Zalman CNPS7000B-AlCu Heatsink
Seasonic Super Tornado 400W PS

Ok, I switched it to SATA 3/4 and then I couldn't boot. I kept getting some error which would cause it to boot again. It happened right after it detected the array successfully. The warning message happened so fast the first couple times I didn't even notice it. It would flash some sort of blue screen like error (only it was a black screen) and then reboot itself.
Frustrated, I decided to start from scratch again. I wiped out the discs and re-created the RAID 0 Array and put my WinXP CD back in. Now while setting up WinXP I hang at the "Setup is starting Windows" screen.
It won't go anywhere from that. It happens after I copy over the RAID Driver and Controller from the Floppy. It copies more files after that and then hangs...
I also reset the CMOS with the jumper settings, un-did and re-did my SATA connections, even unplugged the little MB battery... :(
Any suggestions? This is so frustrating.
TIA.

I would like to migrate from Aperture. What happens to my Masters which are on a RAID array and then what do I do with my Vault which is on a separate Drive please ?

I am sorry, but I do noisy understand what happens to my RAW original Master files, which I keep offline on a RAID array and then what I do with my Vault which as all my edited photos ? Sorry for such a simple question, but would someone please help my lift the fog ?
Thanks,
Rob

Dear John ,
Apologies, as I am attempting to get to the bottom of this migration for my wife ( who is away on assignment ) and I am not 100% certain on the technical aspects of Aperture, so excuse my ignorance.
She has about 6TB worth of RAW Master images ( several 100 thousand ) which, as explained, are on an external RAID drive. She uses a separate Drive as a Vault . Can I assume that this Vault contains all of her edits, file structures , Metadata, etc ?
So, step by step........She can Import into Lightroom her Referenced Masters from her RAID and still keep them there ? Is that correct ?
The Managed Files that are backed up by her Vault , are in the pictures folder of her MacPro, but not in a structure that looks like her Aperture library ? This means Lightroom will just organize all the Managed files, simply by the date in the Metadata ? Am I correct ( Sorry for being so tech illiterate ).
How do I ensure she imports into Lighgtroom in exactly the same format as she runs her workflow in Aperture ? ( Projects, that are organized by year and shoot location and Albums within those projects with sub-locations, or species , etc ). What exactly do I need to do in Aperture please to organize Managed Files to create a mirror structure of Aperture on my internal Hard Drive ?
There are a couple of points I am unsure about in regard to Lightroom. Does it work in the same way as Aperture ? Meaning, can she still keep Master Files on an external RAID and Lightroom will reference them ? If the answer is yes, how do you back up your Managed ( edited ) work in Lightroom ? ( Can you still use an external Drive as a Vault ? ) . Will the vault she uses now be able to continue to back up Managed Files post migration ?

RAID sets and volumes

I am trying to set up a RAID5 but am having trouble with the volumes. My RAID set is 5.23TB but my Volume is only 2TB. I am creating a second volume of 3.23TB. Is there a way to combine the two volumes into one volume of 5.23TB to match the RAID set?

Use this guide:
RAID Utility - User Guide
To delete a RAID set or a volume:
1 Open RAID Utility and choose the volume or RAID set in the left column.
2 Click Delete Volume or Delete RAID Set.

Raid Performance and Rebuild Issues

Rebuilding a Raid array
What happens when you have a Raid array and one (or more) disk(s) fail?
First let's consider the work-flow impact of using a Raid array or not. You may want to refresh your memory about Raids, by reading Adobe Forums: To RAID or not to RAID, that is the... again.
Sustained transfer rates are a major factor in determining how 'snappy' your editing experience will be when editing multiple tracks. For single track editing most modern disks are fast enough, but when editing complex codecs like AVCHD, DSLR, RED or EPIC, when using uncompressed or AVC-Intra 100 Mbps codecs, or using multi-cam or multiple tracks the sustained transfer speed can quickly become a bottleneck and limit the 'snappy' feeling during editing.
For that reason many use raid arrays to remove that bottleneck from their systems, but this also raises the question:
What happens when one of more of my disks fail?
Actually, it is simple. Single disks or single level striped arrays will lose all data. And that means that you have to replace the failed disk and then restore the lost data from a backup before you can continue your editing. This situation can become extremely bothersome if you consider the following scenario:
At 09:00 you start editing and you finish editing by 17:00 and have a planned backup scheduled at 21:00, like you do every day. At 18:30 one of your disks fails, before your backup has been made. All your work from that day is lost, including your auto-save files, so a complete day of editing is irretrievably lost. You only have the backup from the previous day to restore your data, but that can not be done before you have installed a new disk.
This kind of scenario is not unheard of and even worse, this usually happens at the most inconvenient time, like on Saturday afternoon before a long weekend and you can only buy a new disk on Tuesday...(sigh).
That is the reason many opt for a mirrored or parity array, despite the much higher cost (dedicated raid controller, extra disks and lower performance than a striped array). They buy safety, peace-of-mind and a more efficient work-flow.
Consider the same scenario as above and again one disk fails. No worry, be happy!! No data lost at all and you could continue editing, making the last changes of the day. Your planned backup will proceed as scheduled and the next morning you can continue editing, after having the failed disk replaced. All your auto-save files are intact as well.
The chances of two disks failing simultaneously are extremely slim, but if cost is no object and safety is everything, some consider using a raid6 array to cover that eventuality. See the article quoted at the top.
Rebuilding data after a disk failure
In the case of a single disk or striped arrays, you have to use your backup to rebuild your data. If the backup is not current, you lose everything you did after your last backup.
In the case of a mirrored array, the raid controller will write all data on the mirror to the newly installed disk. Consider it a disk copy from the mirror to the new disk. This is a fast way to get back to full speed. No need to get out your (possibly older) backup and restore the data. Since the controller does this in the background, you can continue working on your time-line.
In the case of parity raids (3/5/6) one has to make a distinction between distributed parity raids (5/6) and dedicated parity raid (3).
Dedicated parity, raid3
If a disk fails, the data can be rebuild by reading all remaining disks (all but the failed one) and writing the rebuilt data only to the newly replaced disk. So writing to a single disk is enough to rebuild the array. There are actually two possibilities that can impact the rebuild of a degraded array. If the dedicated parity drive failed, the rebuilding process is a matter of recalculating the parity info (relatively easy) by reading all remaining data and writing the parity to the new dedicated disk. If a data disk failed, then the data need to be rebuild, based on the remaining data and the parity and this is the most time-consuming part of rebuilding a degraded array.
Distributed parity, raid5 or raid6
If a disk fails, the data can be rebuild by reading all remaining disks (all but the failed one), rebuilding the data and recalculating the parity information and writing the data and parity information to the failed disk. This is always time-consuming.
The impact of 'hot-spares' and other considerations
When an array is protected by a hot spare, if a disk drive in that array fails the hot spare is automatically incorporated into the array and takes over for the failed drive. When an array is not protected by a hot spare, if a disk drive in that array fails, remove and replace the failed disk drive. The controller detects the new disk drive and begins to rebuild the array.
If you have hot-swappable drive bays, you do not need to shut down the PC, you can simply slide out the failed drive and replace it with a new disk. Remember, when a drive has failed and the raid is running in 'degraded' mode, there is no further protection against data loss, so it is imperative that you replace the failed disk at the earliest moment and rebuild the array to a 'healthy' state.
Rebuilding a 'degraded' array can be done automatically or manually, depending on the controller in use and often you can set the priority of the rebuilding process higher or lower, depending on the need to continue regular work versus the speed required to repair the array to its 'healthy' status.
What are the performance gains to be expected from a raid and how long will a rebuild take?
The most important column in the table below is the sustained transfer rate. It is indicative and no guarantee that your raid will achieve exactly the same results. That depends on the controller, the on-board cache and the disks in use. The more tracks you use in your editing, the higher the resolution you use, the more complex your codec, the more you will need a high sustained transfer rate and that means more disks in the array.
Sidebar: While testing a new time-line for the PPBM6 benchmark, using a large variety of source material, including RED and EPIC 4K, 4:2:2 MXF, XDCAM HD and the like, the required sustained transfer rate for simple playback of a pre-rendered time-line was already over 300 MB/s, even with 1/4 resolution playback, because of the 4 4 4 4 full quality deBayering of the 4K material.
Final thoughts
With the increasing popularity of file based formats, the importance of backups of your media can not be stressed enough. In the past one always had the original tape if disaster stroke, but no longer. You need regular backups of your media and projects. With single disks and (R)aid0 you take risks of complete data loss, because of the lack of redundancy. Backups cost extra disks and extra time to create and restore in case of disk failure.
The need for backups in case of mirrored raids is far less, since there is complete redundancy. Sure, mirrored raids require double the number of disks but you save on the number of backup disks and you save time to create and restore backups.
In the case of parity raids, the need for backups is more than with mirrored arrays, but less than with single disks or striped arrays and in the case of 'hot-spares' the need for backups is further reduced. Initially, a parity array may look like a costly endeavor. The raid controller and the number of disks make it expensive, but if you consider what you get, more speed, more storage space, easier administration, less backups required, less time for those backups, continued working in case of a drive failure, even though somewhat sluggish, the cost is often worth more with the peace-of-mind it brings, than continuing with single disks or striped arrays.

Raid3 is better suited for video editing work, because it is more efficient when using large files, as clips usually are. Raid5 is better suited in high I/O environments, where lots of small files need to be accessed all the time, like news sites, webshops and the like. Raid3 will usually have a better rebuild time than raid5.
But, and there is always a but, raid3 requires an Areca controller. LSI and other controller brands do not support raid3. And Areca is not exactly cheap...
Keep in mind that a single disk shows declining performance when the fill rate increases. See the example below:
A Raid3 or Raid30 will not show that behavior. The performance remains nearly constant even if fill rates go up:
Note that both charts were created with Samsung Spinpoint F1 disks, an older and slower generation of disks and with an older generation Areca ARC-1680iX-12.

Possible to RAID 0 and run Boot Camp partition?

I have a mid-2010 MacBook Pro (13"). I have a stock 250 GB hard drive and I just got a SanDisk 256 GB SSD.
I'm running Windows (through Boot Camp) on a small partition of my stock 250 GB hard drive. I want to install the SSD in my optical drive and RAID the two hard drives (250 GB and 256 GB). I also want to wipe my Windows partition and make it bigger (around 50-100 GB).
My question is: is it possible to RAID 0 and have a Windows parition at the same time? What's the best way to do it if it's possible?
Thanks

If you are planning on setting them up in a Raid Array, it doesn't really matter. The performance is going to be poor no matter what. I see your plan as spending money for little or no gain.
Have you considered just removing the current disk drive and replacing it with a larger one. I think that would give you the best performance for the least money and the fewest headaches getting it set up.
Your need for Windows is preventing me from making any other suggestions. Windows has so many lkimitations built into it.
Allan

Raid Card and Multiple Hardrives.

does anyone have any idea if I can use the raid card to use a seperate hard drive to run windows and then use another drive for mac OSX? That way I don't have to worry about partitioning my hardrive. If there is any way to do so I would really like to know. Also any cheaper suggestions for a raid card?

Fact is you cannot use the APPLE RAID CARD and also run Windows on any of the internal SATA ports. Unless you want to play around with iPass or reroute the cables.
http://www.apple.com/support/macpro/
I consider the RAID card more hinderance, and not just in terms of Boot Camp.
http://www.apple.com/support/bootcamp/
Windows 7 is fine, more users probably than use Leopard, and runs well, no issues, and better than Vista even with SP2.

RAID 5 and filesystems

I have a SunFire server with 3 disks. My primary goal is to have the metadb spread across all three disks in order to achieve the required quorum, in the event a disk goes bad and there is a need to reboot. Additionally I would like to use RAID 5.
The Sun documentation specified the following regarding RAID 5:
--- Cut Here ---
Like a mirror, a RAID 5 volume increases data availability, but with a minimum of cost in terms of hardware and only a moderate penalty for write operations. However, you cannot use a RAID 5 volume for root (/), /usr, and swap, or for existing file systems
--- Cut Here ---
Does this mean that I would have to use some other scheme (Such as RAID 1) for root(/), /usr and swap?
The metainit command is required for RAID 5 and expects as arguments whole disks and not slices. If anybody has implemented RAID 5 or some unique combination of RAID 5 to circumvent the afformentioned FS limitations, I would certainly like your feedback.
Many Thanks,
soul_survivin

I use LVM-on-RAID, but I think of the layers as:
RAID - do fancy stuff like mirroring/striping/etc. for performance + security
LVM - make my life easier when it comes to allocating diskspace
That is, I usually put the LVM on top of RAID, giving all of the RAID device to LVM as a physical volume and volume group, and then allocate only what I currently need for my system into logical volumes (for /, /home, etc.). I might not originally have had a separate /var/ partition, but then realize it'd be cool to try it out on another filesystem to improve pacman performance, at which point I can create a new logical volume and mount that as /var/. Then, when I realize that there's an even *better* filesystem out there (as there inevitably is), I can simply create another logical volume with the new filesystem (assuming I still have space in my volume group), sync the stuff over from my old var, and mount the new one as /var/. Once I'm satisfied that the new /var/ is good and performs better, I can delete the old logical volume and reclaim the space. So, LVM to me is more about flexibility with my filesystems/mountpoints and not having to worry about fiddling the partition table and blowing stuff up.
If you're mainly concerned with growing RAID arrays, you can probably skip LVM; the way I use LVM, you'd have to grow the RAID array under LVM first, anyway.

RAID 0 and Bootcamp

I read some post here that stated that it is not possible to have a RAID 0 and have Bootcamp run on the Mac Pro. Is that true? Is there any possible way around this?
Thanks.

Hatter,
Thanks for the response. Would the following two scenarios allow me to run BC with a Raid 0:
1. Put Vista and Mac OS on a single, largest possible Raptor 10k boot drive, which would also run all apps. Then have a few other drives organized as a Raid 0 for storage and scratch disk purposes?
2. Put Vista on one drive, MAC OS on another (both would be separate, non-raid) then have another few drives that are organized as a Raid 0 to provide for storage/scratch disk use?

Raid 1 and JBOD?

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