Data Array RAID 5 on a windows 2003 server

Microsoft Windows xp pro with sp3 multil...
May 3, 2011 at 15:16:46
Specs: Windows 7
Hello all,

I have a windows server with a data array RAID 5. Basically, what I trying to figure out is how the data array is setup. I will explain as much as I can in detail. When I'm in disk management I see an a:drive on the server which is called data array. I see the total size is 2TB and RAID 5. I see Disk 0-Disk 8. Disk0 is the c:drive and isn't apart of the RAID. Disk1-Disk8 is shows as being apart of the RAID and each drive is 298GB.

When I physically look at the storage array I see 12 disks-4 bays (3 disks in each bay). Why in Windows do I only see 8 disks online when there is 12 disks in the array? Also, I see a green light on all the disk but the first 8 flash green and red. I believe the last 4 disks are spares? Shouldn't windows see the last 4 disks but see them as offline or unallocated? I'm unsure of this how do I check that? There is no make or model located on the data array nor any info on the disks themselves.

Any help would be great.

IT TECH, stuck on helpdesk


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#1
May 3, 2011 at 19:39:00
Searched with Bing - found this:

http://www.ehow.com/raid-configurat...


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#2
May 4, 2011 at 19:15:03
"I see 12 disks"
"Disk0 is the c:drive"
"Disk1-Disk8 is shows as being apart of the RAID and each drive is 298GB."

Things to understand.
If hardware raid disk management will see the raid array as one disk because that is what the hardware reports to the OS.
Since you see a raid5 array in disk management this is a software raid.
(8)disks x 295=2360 - 1 drive for parity space = 2096gig or 2TB so that is correct.

You are seeing a total of 9 disks in disk mangement. This leave 3 disks unaccounted for.

First question is does this server have a hardware raid controller. You can check this by cold booting the server and seeing if you see a raid controller announce itself and provide a key strokes [like control A] to access its config.

My hope is that you do have a raid controller and your OS drive is hardware mirrored which would only leave two drives unaccounted for.

Note: only a hardware raid can use hot spares. Software raid does not have this abiltiy.

Answers are only as good as the information you provide.
How to properly post a question:
Sorry no tech support via PM's


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