topic Re: ML370 G5 SAS drive in single cage - Can we configure an Array with more than 4 drives? in ProLiant Servers (ML,DL,SL)

ML370 G5 SAS drive in single cage - Can we configure an Array with more than 4 drives?

vin reddy — Thu, 24 Jul 2008 22:47:05 GMT

We have a ML370 G5
Single SAS drive cage - 2x36 5x72 drives
P600 Controller...using two internal channels

Configured 2x36 as the mirrored OS drives...OK

Want to configure 5x72 as a single RAID 5 array.

CANNOT DO..can only get 4 (bays 5-8)in RAID 5. The other 72GB drive can only go into bay 3 or 4 and cannot be added to the RAID 5 Array.

Is it possible to configure a RAID 5 array with all 5x72 drives with what I have?

Thanks

Re: ML370 G5 SAS drive in single cage - Can we configure an Array with more than 4 drives?

KarloChacon — Thu, 24 Jul 2008 23:20:53 GMT

hi vin

what do you mean by "can not be added to RAID 5"?

ACU is not letting you to add a 5Â° HDD to that RAID? are you getting an error?

can you post a screen of the error or configuration?

regards

Re: ML370 G5 SAS drive in single cage - Can we configure an Array with more than 4 drives?

TarunJain — Thu, 24 Jul 2008 23:48:08 GMT

Dear Vin,

As per server configuration it is not possible to attach more than 4 hdd to a single channel.
There are two connectors on the Hard Drive backplane. One is for slot no. 1-4 & another for slot no. 5-8.

Re: ML370 G5 SAS drive in single cage - Can we configure an Array with more than 4 drives?

vin reddy — Fri, 25 Jul 2008 17:50:02 GMT

Hi Karlo,
what do you mean by "can not be added to RAID 5"?

It seems like the 8 bays are seen as two different sets of 4 bays and in ACU you cannot RAID together 1-4 drive with 5-8 drives.

ACU is not letting you to add a 5Ã Â° HDD to that RAID? are you getting an error?

There are no errors, the drive from the different set of 4 are simply not available to be aded to an Array.

Thanks

Re: ML370 G5 SAS drive in single cage - Can we configure an Array with more than 4 drives?

vin reddy — Fri, 25 Jul 2008 17:54:04 GMT

Hi TarunJain

So do you mean to confirm that with my current configuration I cannot create a RAID 5 array with more that 4 drives in it?

I could not find any docs on HPs site to support this. Do you see anything?

Thanks

Re: ML370 G5 SAS drive in single cage - Can we configure an Array with more than 4 drives?

KarloChacon — Fri, 25 Jul 2008 19:01:20 GMT

hi

it does not make any sense to me even if controller has 2 channels ACU must let you use all 8 HDDS from drive cage and create a RAID using all of them if you want or mixing channels

can you post a screen of ACU?

do you have cabling properly connected?
page 40
http://bizsupport.austin.hp.com/bc/docs/support/SupportManual/c00710498/c00710498.pdf

regards