HPE ProLiant Storage Systems

ACU default settings for RAID-5

 
BAA_
Occasional Contributor

ACU default settings for RAID-5

Hi,

 

We recently had a problem with a dropped RAID-5 array, i'm trying to reconstruct it but i'm complettely in the dark, just guessing the correct parameters for it. I'm pretty sure that the person who configured the array the first time did it with the default settings (with ACU).

Would be of great help to know the defaults for Stripe Size and Block Order.

 

Thanks in Advance.

3 REPLIES 3
gregersenj
Honored Contributor

Re: ACU default settings for RAID-5

Your question doesn't compute. :

What are you trying to do?

What are the current status?

What are the root caurse for the lost RAID?

 

Give me more details, and I will help you.

 

below find some good reading.

 

BR

/jag

 

ACU "user guide":

http://www.cs.uwaterloo.ca/~brecht/servers/docs/HP-DL-585-G6/HP-Smart-Array-P410-Controller.pdf

 

Smart Array Technology brief:

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00687518/c00687518.pdf

 

Smart Array user guide

http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/c01608507/c01608507.pdf

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BAA_
Occasional Contributor

Re: ACU default settings for RAID-5

I'm trying to get the array the way it was. To be recognized as it were along with the data it has.

To do so, i'm using RAID reconstructing software, but i need to feed it the right parameters from the original RAID (Disk Order, Stripe Size and  Block Order).

It was originally configured with ACU and i'm pretty sure the default parameters were used to do it. I readed somewere that the default stripe size used by ACU is 64K, and i think i have the right disk order, but still missing the block order (none actually seems to work).

Current status: Still making combinations trying to obtain the right parameters.

The original cause of the problem was that the RAID was thought to be a RAID-1 so i took off a disk to perform some tests and backup.

 

Thanks again.

gregersenj
Honored Contributor

Re: ACU default settings for RAID-5

"The original cause of the problem was that the RAID was thought to be a RAID-1 so i took off a disk to perform some tests and backup"

 

How many disks do you hvae?

 

Sure it's not a RAID 0?

 

What does the ACU say?

 

Have you deletet the old RAID?

If a Smart Array controller suffer from a catastrophic failure, it will stop using the affected logical drive(s).

If you are able to restart the failed disks, then the logical drives can be re-enabled.

 

So if you have a RAID 0, and you have removed a disk. You can re-insert the disks, and  re-enable the logical drive(s).

 

The chunk size does depend on Controller model/ FW version/RAID level.

 

BR

/jag

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