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

Similar Messages

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

RAID 0 or JBOD?

Hi,
I have 2 250Gb internal SATA disks on my macPro and I want my system to see them as one disk... Is it better to choose RAID0 or JBOD?
What's the difference... And what about the risks? (e.g. Is it more dangerous a single 500Gb Drive or 2 striped disks?)
My typical use is DV Video and Motion Graphics and I ususally make backups twoce a week...
Thanks

A JBOD (Just a Bunch of Disks) takes multiple drives and simply treats them as if they were one large (additive) device. You can use drives of different sizes and speeds. The overall throughput is determined by the slowest drive in the set.
RAIDs (Redundant Array of Inexpensive [or Independent] Disks)
A "Striped" RAID consists of mutliple drives or multiple volumes on multiple drives that are of equal size. If you combine two drives of unequal size the RAID's size will be determined by the smallest drive. For example, if you combine a 500 GB drive with a 250 GB drive in a two-drive striped RAID the total size of the RAID will be 500 GBs (250 GBs of the larger drive combined with the smaller drive.) A striped RAID actually writes a fraction of the data to each drive. This results in a multiple effect on throughput. A four drive striped RAID may actually be close to four times faster than the slowest drive in the set.
Striped RAIDs provide no data redundancy. If one of the drives in the RAID becomes damaged it's possible to lose all the data on the RAID. Hence, backup is essential to provide data redundancy.
A "Mirrored" RAID combines two drives or volumes of equal size. Data written to one drive is instantaneously "mirrored" on the second drive. This type of RAID is slower than a single drive (data must be written twice) but provides data redundancy. Of course any data corruption on one of the drives will be instantly mirrored on the other drive.
In an enterprise or large server setting a striped RAID may be configured to provide large amounts of fast access storage. A second striped RAID of equal configuration would then be used to act as a mirror providing data redundancy.
For most small home and business uses there's little need for RAIDs unless you have unusually large data storage requirements. RAIDs should not be used as startup volumes.
For more on the topic: http://en.wikipedia.org/wiki/Redundantarray_of_independentdisks.
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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.

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.

Converting Storedge 3310 RAID unit to act as JBOD?

Hello, I have been struggling with this configuration, any advice is appreciated.
I have 4 x Storedge 3310 RAID units each with it own controller. I have 1 x Linux host and 1 x HBA in the host, with ch0 and ch1. I want to be able access to all 4 Storedge 3310s. Normally if this were 2 x Storedge 3310 RAID + 2 x JBOD then I just connect each RAID unit to a JBOD then each RAID to ch0 and ch1 respectively to the host. Instead what I have is 4 x Storedge 3310 RAID units, is there a way to convert two of the Storedge 3310 unit to make it act exactly like a JBOD? So that I can daisy-chain them to make them all accessible to the host?
Or adding another HBA card to the host is the only option?
thank you.

What is the difference between the host/drive channel? Besides the fact that they are their for connecting to disk drive or to host. Because lets say I connect the first RAID controller to the second one, host-to-host configuration from one RAID to another, will the host see this transparently?
By the way, I tried the JBOD method you mention so basically just connect one of the RAID unit to the other one just as a JBOD and the RAID controller can see the disks on a difference channel but only half of the disk because the RAID I/O actually have internal conneciton to half of the disk, while the other half is jumper.

Raid 0 (Stripe) for OS X boot disk? Best Performance and block size

Hi,
so this is a new thread to an older question I had and would like some feedback on;
I have a new Mac Pro with 4 matched 1TB caviar black drives. I WILL be doing Full Time-Machine Backups, as well as an independant full-system backup regularly.
That being said, I have 4 drives open and am looking for suggestions. I am leaning toward 2 sets or stripes (one for the OS and one for 'work space', the former with a 32k stripe block size, the latter with 64k (will hold video, audio, scratch, and, yes, Games).
Does this sound alright? Is there an issue with Striping the boot drive? Is the block size or 32 (or 64) optimal?
Thanks!
Dan

Hi D# Shooter, regarding your question,
D3 Shooter wrote:
You brought to mind something I did not take into consideration, Time Machine. I really like the simplicity of TM as it saved me once before. So, could you tell me, for photo files, some video, how much does the striping (% wise) improve the accessing and filing of such files compared to no striping but, using internal drives (7200/WD/1TB/Caviar)? I have not done striping before and want to weigh in because of the back up storage issues now. Thanks.
J_ust give it a try and see if it is worth it for you_.
Striping:
• just enhances (reduces the access/transfer) because in practice the access is distributed in parallel across several DDM's (Old school but it works great!). I think for video and file work the advantage is that you can access the whole object sooner (rather than faster).
• this distribuition also reduces a load of old style queing on the device ove rthe path. THis was resolved in the late 1980's so no reall rocket science here.
the issues with striping are few and basically over all the raid implementations (except JBOD which of course is not raid) when compared to a single spindle. The discussions are enormous and plentiful via google and experiences and opinions vary widely.
Fir the I.T. peole its the advantage they get for access using a smart disk controller that caches goosies like indexes and stuff so that they can sustain a zillion trivial transactions/sec (i.e. banking & internet stuff).. stuff that is of no interest to me
For the creative people and many applications that are BLOB's (like video, film and remote sensing objects) getting use of the objects sooner (not faster) is of prime importance for workflow efficiencies. If you have this need then striping stiff across disks is for you!
TIMEMACHINE.app works fine as it seems fairly agnostic to whats implemented under the disk file system. MY issue with time machine is that I don't want it looking after my production stuff, only to keep an eye on my admin I.T. type stuff such as ~/ and data data files.
As posted on ths thread:
• availability is the major concern with any file system (cloud or raid or other). RAID with parity schemes and double parity schemes (Raid1,,3,5,6) and implementations such as RAID6+ LSF (log structured file) are all wonderful for this business workflows that need it.
• timely access in a workflow is another
• cost benefits are another
However a *great benefit* for me of *consolidating small storage components under one huge file system is that you dont have to COPY any thing around*. THis is marvelous especially when you think you have to move 2TB's of stuff from one place to anther. THis a takes a lot of time with elcheapo didks that dont have fast interfaces such as SATA/SAS of FC for example.
As always and has been addressed by others on this thread (Hatter) if you lose a component storage device the whole file system is hosed or severely degraded unless you spend a lot of money on full ranks of DDMs with hot spares and a very good RAID controller card. Again its money.
YEah sure you can carry some PARITY RAID implementation around across 3 didks but the storage capacity usage is dreadful. THis is why more complex RAID implemntatiosn are in groups of 10+ dDMs.. (yep poepl can argue.. but this is the mainstream).
My external disk arrays are merely two LUNs (SAS DOMAINSA) that have two file systems implemented using 2 x 4TB 1TBs DDMS - all RAID0 - no parity (no availability) - I just want speed. I look after my own "availability" withm= my archive solution. If the operation dies, I stat again. I'm happy wi that. RAID 5 has write penalty performace hits (well known +update in place+), , RAID 6+ is lousy for huge objects but good for I.T. but ok if you lose two disks in a stripe (RANK).
They all have their flaws... and mirroring a RAID0 (RAID1/0) seems to be popular with storage vendors because they can see you more disk and thats proper business workflow depends on it.
However you can achieve this stuff if you change your workflow slightly.
Other than these the rest is tech specs and stuff under the cover.
So you what is right for you and your business.
I dont like spending money on nasty elcheapo FW800 LeCIE disk enclosures with the their junky components and their ilk having been done badly on several corrupted devices and lsing TB;s of content - this is why I invested in a high speed LTO4 ULtrium data tape archive solution.
sorry for long post..
w

MacPro RAID SLOW?

I keep reading Disk Whack test results online using Aja's System Tester with setups just like mine and my results are pitifully slow. I have 2 Seagate 750 GB 7200rpm drives setup in a Raid 0 stripe and an Apple Raid Card. With NOTHING on the drive I'm getting roughly a write speed of 78MB/s and a read speed of about 90 MB/s. Everywhere else I've seen this config tested using all the same parameters I'm seeing results more than double that. I called Apple support and got nowhere. Any ideas would be GREATLY appreciated. I'm thinking of going with a CalDigit Raid Card and drives but I still want to know what's up with this config first.

I get almost identical readings on the RAID at 60% capacity and at 0% capacity. 78 write and 90 read.
Here is my Raid Utility setup. Maybe someone can spot an issue in here:
Mac Pro RAID Card:
PCI Slot: Slot-4
Hardware Version: 1.00
Firmware Version: M-2.0.3.3
Expansion ROM Version: 0018
Shutdown Status: Normal shutdown
Battery Info:
Firmware Revision: 1.0d19
First Installed: 3/8/08 12:19 AM
Last Date Conditioned: 10/22/08 1:41 PM
State: Working battery
Fault: Normal battery operation
Status:
Charging: Yes
Conditioning: No
Connected: Yes
Discharging: No
Sufficient Charge: Yes
Drives:
Bay 1:
Product ID: ST3750640AS P
Serial Number: 5QD1PT1P
Firmware Revision: 3.BTH
Type: SATA
SMART Status: Verified
Capacity: 698.64 GB
RAID Sets: R0-1
Status:
Assigned: Yes
Failed: No
Foreign: No
Missing: No
Reliable: Yes
Roaming: No
Spare: No
Bay 2:
Product ID: ST3750640AS P
Serial Number: 5QD1P9X5
Firmware Revision: 3.BTH
Type: SATA
SMART Status: Verified
Capacity: 698.64 GB
RAID Sets: R0-2
Status:
Assigned: Yes
Failed: No
Foreign: No
Missing: No
Reliable: Yes
Roaming: No
Spare: No
Bay 3:
Product ID: ST3750640AS P
Serial Number: 5QD1P96S
Firmware Revision: 3.BTH
Type: SATA
SMART Status: Verified
Capacity: 698.64 GB
RAID Sets: R0-2
Status:
Assigned: Yes
Failed: No
Foreign: No
Missing: No
Reliable: Yes
Roaming: No
Spare: No
RAID Sets:
R0-1:
RAID Level: Enhanced JBOD
Capacity: 698.45 GB
Available Capacity: 0 bytes
Drives: Bay 1
Volumes: Vol-R0-1
Status: Viable (Good)
R0-2:
RAID Level: 0
Capacity: 1.36 TB
Available Capacity: 0 bytes
Drives: Bay 2, Bay 3
Volumes: R2V1, Vol-R0-2
Status: Viable (Good)
Volumes:
R2V1:
BSD Name: disk3
Capacity: 698.57 GB
Read Command Size: 2 MB
Read Ahead Margin: 16 MB
RAID Set: R0-2
Status:
Degraded: No
Inited: Yes
In Transition: No
Viable: Yes
Vol-R0-1:
BSD Name: disk1
Capacity: 698.45 GB
Read Command Size: 2 MB
Read Ahead Margin: 16 MB
RAID Set: R0-1
Status:
Degraded: No
Inited: Yes
In Transition: No
Viable: Yes
Vol-R0-2:
BSD Name: disk2
Capacity: 698.45 GB
Read Command Size: 2 MB
Read Ahead Margin: 16 MB
RAID Set: R0-2
Status:
Degraded: No
Inited: Yes
In Transition: No
Viable: Yes

Px6-300d raid types problem

Just bought new px6-300d and installed into it 4 WDC_WD40EFRX (WD Red 4Tb)
In "Add storage" area in "Protection" combo there are only RAID 5, RAID 10, RAID 0 and None. I need RAID 1 and JBOD and i guess px6 should support such types of RAIDs. So how i can enable RAID 1 and JBOD on px6?
P.S. Firmware is 4.0.8.23976
Solved!
Go to Solution.

Just for information
I selected 2 disks and RAID 10 option and NAS created it as RAID 1, what i actualy needed
So it works but it's not very clear behaviour

K9A2 Platinum Raid 1 Setup / Installation Problem

I'm trying to setup a raid 1 with my new K9A2 Platinum board. I would prefer to use the promise controller but have had no luck with the SB600 or Promise.
My PC:
2 gig GSkill Ram 800mhz
2 Identical Seagate Barracuda 7200.10 hard drives
750w Corsair psu
AMD 5200+
Vista Home Premium
GeForce 8600GT
The first hard drive has everything loaded on it including all my business and personal data, so I don't want to reformat and start over with that drive. I just want to add another drive as a mirror for redundancy purposes.
Symptoms:
I can't select my RAID configuration in the Fastbuild Utility. It will show me the current drives as connected, Model, Capabilities, Capacity, RAID mode (showing JBOD), and Status (Functional). The bottom of the screen doesn't give me any options, it just says "Any Key to Continue" at which point it brings me back to the main page of Fastbuild. I have a pictures of the relevent screens, just haven't figured out how to post them here.
What I've already tried:
Enabled the SB600 as Raid while drives plugged into SATA1 and SATA2. (once each with Onboard controller Enabled and Disabled)
Enabled the OnBoard Controller while drives plugged into SATA5 and SATA6 (once each with SB600 set as RAID, set as IDE, and Disabled)
So how do I select RAID 1 as my configuration?
TIA.

Steps to RAID 1:
1) Backup your data to a third drive.
2) Connect both Seagate drives to the Promise controller.
3) Enable the Promise controller in your BIOS.
4) Enter the FastBuild utility using CTRL + F.
5) Select 'Define Array' (I believe it's option # 3).
6) Define parameters and asign drives to the array
7) Save and reboot.
The RAID 1 array is now active. If you plan to install an OS on it, you will need to load a driver during setup. For WinXP you will need to use a floppy and F6, for Vista you can use other media as well (CD-ROM, USB stick, etc.).
If you plan to run your OS from a third drive, you will just need to boot to the OS and access the Drive Manager. Create a partition on the RAID 1 array, the OS will format the array and it will prompt you to reboot when finished.
Regarding the external drive, it's best to use a hard drive of choice and an eSATA external enclosure. I use an ICY IB-351 BL Series for example, it has eSATA, Firewire and USB 2.0. I also have a Cooler Master X-Craft, same idea. It might come in handy to be able to swap drives...

Set up I guess in raid, need more storage now!

I am new to this, I bought WD Mycloud EX4 along with two WD Red 3 TB drives, set up to run (I am now thinking in Raid 1 / mirroring mode) and then my kids put two of their drives in. They are not recognized at all, and I am now out of storage which is only 3 TBs not the 6 TBs I want. Is there any way to switch to no raid, without reformatting and having to erase everything, I want to have eventually 9 TBs of storage, and one drive bay available to swap out drives. any hope of not erasing all

GuidoS wrote:
I am new to this, I bought WD Mycloud EX4 along with two WD Red 3 TB drives, set up to run (I am now thinking in Raid 1 / mirroring mode) and then my kids put two of their drives in. They are not recognized at all, and I am now out of storage which is only 3 TBs not the 6 TBs I want. Is there any way to switch to no raid, without reformatting and having to erase everything, I want to have eventually 9 TBs of storage, and one drive bay available to swap out drives. any hope of not erasing all Go to Storage - RAID - Chang RAID mode - JBOD See if you have "Downgrade RAID 1 to JBOD You will not lose any data.

Can I config. a SSD with two SATA drives on a RAID pro card?

Hello,
I'm planning to order the new Mac Pro (hexa 3.33) and want to run OS X and my main applications off of it for speed. I was planning to get two SATA drives and connect them with a RAID pro card. Is this set up compatible (i.e. running an SSD with a RAID pro card installed in the system)?
The reason why I'm asking is that on the APPLE build your MAC site there is a note about the RAID pro card:
"Note: Solid-state drives are not compatible with the Mac Pro RAID Card in either RAID or Enhanced JBOD mode. To add a solid-state drive to your Mac Pro in any drive bay, you must deselect the Mac Pro RAID Card."
Thanks for your help guys (and gals)

Thanks. I have the Apple RAID card in my Early 2008 Mac Pro and it's served me reasonably well. I use it for RAID-5 and I don't care about booting Windows so that's not an issue for me (though I confess that I hadn't even considered the implications for Windows).
I bought the system with one Apple drive (a 1TB Hitachi) and added three additional Seagate 1TB drives and have had no problems beyond the need to replace a failed drive, and in that case the array was rebuilt and the system is behaving well again.
Ah, so you're talking about third-party SATA controllers that go in a PCI Express slot, to which one would connect a third-party RAID enclosure via eSATA, is that correct?
Concerning the additional SATA ports on the Mac Pro motherboard: I don't know about the just-announced models, but MacSales was/is selling a SATA cable for the prior model--apparently that model has one additional SATA port (not two) on the motherboard.
By the way: I had a question in another thread (http://discussions.apple.com/thread.jspa?threadID=2545031) about whether it's possible to upgrade my Apple-card-managed RAID-5 array in place. If you (or anyone else with expertise) could take a quick look, I'd appreciate it.

Apple Raid Card Battery Failed

Hey guys !
I have an early 2008 Mac Pro with a Raid Card and i get this message battery failure other than expired
actually i got this message again about an year or so back ... so yes it happened before ... Apple replaced my battery
Now im out of warranty coverage.
Questions are :
How does this affect my Raid Set ?
Can my Raid Set survive without the battery ?
If yes ... what are the downsides ?
What can i do to manage the situation without changing again the battery ?
Hope to get some advice soon on this matter
Thank you very much.
PS
Down below i pasted some specs for my machine
Mac Pro RAID Card:
PCI Slot:          Slot-4
Hardware Version:          1.00
Firmware Version:          M-2.0.5.5
Expansion ROM Version:          0018
Shutdown Status:          Normal shutdown
Write Cache Enabled:          No
Battery Info:
Firmware Revision:          1.0.2
First Installed:          1/1/01 2:16 AM
Last Date Conditioned:          2/24/12 3:47 PM
State:          Faulted Battery
Fault:          Battery failed (other than expired)
Status:
Charging:          No
Conditioning:          No
Connected:          Yes
Discharging:          No
Sufficient Charge:          No
Drives:
Bay 1:
Product ID:          ST3300655SS
Serial Number:          3LM35BGK00009827PBXY
Firmware Revision:          A005
Type:          SAS
SMART Status:          Unsupported
Capacity:          300 GB (299,999,999,488 bytes)
RAID Sets:          RS1
Status:
Assigned:          Yes
Failed:          No
Foreign:          No
Missing:          No
Reliable:          Yes
Roaming:          No
Spare:          No
Bay 2:
Product ID:          ST3300655SS
Serial Number:          3LM622YT00009923HP5Q
Firmware Revision:          A005
Type:          SAS
SMART Status:          Unsupported
Capacity:          300 GB (299,999,999,488 bytes)
RAID Sets:          RS1
Status:
Assigned:          Yes
Failed:          No
Foreign:          No
Missing:          No
Reliable:          Yes
Roaming:          No
Spare:          No
Bay 3:
Product ID:          ST3300655SS
Serial Number:          3LM2Y49T00009827PAZV
Firmware Revision:          A005
Type:          SAS
SMART Status:          Unsupported
Capacity:          300 GB (299,999,999,488 bytes)
RAID Sets:          R0-3
Status:
Assigned:          Yes
Failed:          No
Foreign:          No
Missing:          No
Reliable:          Yes
Roaming:          No
Spare:          No
RAID Sets:
R0-3:
RAID Level:          Enhanced JBOD
Capacity:          299.8 GB (299,798,364,160 bytes)
Available Capacity:          Zero KB
Drives:          Bay 3
Volumes:          Vol-R0-3
Status:          Viable (Good)
RS1:
RAID Level:          0
Capacity:          599.73 GB (599,730,946,048 bytes)
Available Capacity:          Zero KB
Drives:          Bay 1, Bay 2
Volumes:          R1V1
Status:          Viable (Good)
Volumes:
R1V1:
BSD Name:          disk1
Capacity:          599.73 GB (599,730,946,048 bytes)
Read Command Size:          2 MB
Read Ahead Margin:          16 MB
RAID Set:          RS1
Status:
Degraded:          No
Inited:          Yes
In Transition:          No
Viable:          Yes
Vol-R0-3:
BSD Name:          disk2
Capacity:          299.8 GB (299,798,364,160 bytes)
Read Command Size:          2 MB
Read Ahead Margin:          16 MB
RAID Set:          R0-3
Status:
Degraded:          No
Inited:          Yes
In Transition:          No
Viable:          Yes
Hardware Overview:
Model Name:          Mac Pro
Model Identifier:          MacPro3,1
Processor Name:          Quad-Core Intel Xeon
Processor Speed:          3.2 GHz
Number Of Processors:          2
Total Number Of Cores:          8
L2 Cache (per processor):          12 MB
Memory:          8 GB
Bus Speed:          1.6 GHz
Boot ROM Version:          MP31.006C.B05

The RAID card battery backs up the memory buffers on the card. These are needed for calculating the checksum blocks used in RAID 5 and similar schemes.
If you are not running RAID 5 or similar, you do not need the battery. For that matter, you do not need the RAID card, either (unless you are running SAS drives).

Connecting OWC Mercury Elite-AL Pro Dual-Bay (RAID) Enclosure help setup

System info:
Enclosure: OWC Mercury Elite-Pro Dual Bay (RAID Enclosure)
Comps: Mac Pro & MacBook Pro 13"
OS: 10.6.4
Connected enclosure via firewire800 with 2x 2tb hitachi drives.
So I picked up an Open Box version of essentially this enclosure:
http://eshop.macsales.com/item/Other%20World%20Computing/MEFW936AL2/
(the differences is, the light is not in the direct center of the enclosure as pictured and the little blue switch is not on the logicboard under the fan like it was pictured in the instructional booklet).
Now going through the instructional manual, and wanting to set it up as a RAID 0 i noticed that on my enclosure there wasnt a place on the board for it to switch it to proper type of configuration i wanted.
And their site is a little messy (imho) to find the proper info and so many variants of their enclosures.
So heres what my enclosure board looks like:
http://img842.imageshack.us/img842/7708/owc.jpg
I put two 2TB drives in the enclosure (2 Hitachi Deskstar 7200s).
plug it in via FireWire800 to my MacBookPro and get the initialize the drive alert and thats where iam at. I havent set up this particular enclosure before so im not sure if its all software controlled now and the best way to go about configuring it the way I want it to (RAID 0 for now).
and how to go about in the future changing it if i say wanted RAID 1 or JBOD.
any help would be greatly appreciated!
Thank you!

thanks, though the problem has been resolved courtesy of Loudspeakermusic's link.
The problem is that the manual doesnt state anything about this particular drive.
As you can see from the image:
mine does not have the actual jumper settings like indicated of Page 5 of the PDF Manual (the same Manual i got with the actual enclosure).
So the firmwire utility helped as I was able to create the RAID or RAID 1 or SPAN/JBOD properly.
According to OWC if there drive was over 1TB in size I must click on the Enable Large Disk box to allow me to use 2x2TB drives then once I set the firmware to RAID 0, i can format them properly in Disk Utility.
So far I'm running the 2x2TB (4TB) in RAID 0 on my enclosure fine and can transfer just well.
Like Loudspeaker stated, i have to have the drive directly connected and not daisychained as I did not know why I wasnt able to change the firmware settings.
as shown:
Thanks for all the pointers!

KT6V-LSR Sata Raid 0 problems

have been experiencing the following problem running raid 0 on sata.
Running any game after a period the game either stops working and crashes to the desktop or I get bluescreened with various error including IRQL_NOT_LESS_OR_EQUAL or Stop 0x0000008e Win32k.sys.
Has anyone else suffered this problem and found a solution.
I have tried the following.
I have tried Raid 0 and jbod with no difference
Running a single Sata drive without raid the system appeared stable.
Games refused to run without XP SP2
The system ran fine on a single IDE
I have had long discussions with Microsoft who were very pleasant but unable to help.
I have rebuilt the system from scratch several times. It does not appear to matter what additional cards are installed.
My system is as follows.
Mother board MSI KT6V-LSR
Processor AMD XP3200+ 400fsb
Memory 2 x 512mb pc 3200 (Generic)
HDD 1 x maxtor 250gb 7Y250M0 1x WD 250gb WD2500JD
Sound Card Philips psc604
Tuner Pinnacle PCTV PRO
Fire wire Belkin 501
Window XP SP2
PSU 500w (Generic)

Quote
Originally posted by Fredrik Åsenius
Is this what Microsoft has been wondering?
http://support.microsoft.com/default.aspx?scid=kb;en-us;330187
What is your graphics card?
What are your temps?
Are there any error messages in Device Manager?
Final question: What optical devices, CD and DVD, do you have?
The thing about most of the 0x0000008e errors that Microsoft have reports on are pre XP SP2. They claim to have fixed that for SP2.
Graphics card is Gainward Ti4800SE
CD LG CRD-8522B
DVD LG DVD-RAM GSA-4120B
Temps processor 48 - 51
chipset 38 - 40
No errors in device manager

Revert RAID 6 to JBOD

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