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BL860C has 2 drives I see one

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Jo Davis
Advisor

BL860C has 2 drives I see one

I am not familiar with BL860C's. Just received 3 new ones and am setting up. Normally I have 2 drives in each of my servers and mirror them for reliability. These 3 blades which all physically have 2 disk drives in each of them only show 1 drive in the ioscan. Both drives have green LED status lights on the server and appear just fine but I only see one.
Am I missing something with these servers are drives managed differently somehow?
# ioscan -fnNC disk
Class I H/W Path Driver S/W State H/W Type Description
===================================================================
disk 1 64000/0xfa00/0x0 esdisk CLAIMED DEVICE HP IR Volume
/dev/disk/disk1 /dev/rdisk/disk1
/dev/disk/disk1_p1 /dev/rdisk/disk1_p1
/dev/disk/disk1_p2 /dev/rdisk/disk1_p2
/dev/disk/disk1_p3 /dev/rdisk/disk1_p3
7 REPLIES
Robert-Jan Goossens_1
Honored Contributor

Re: BL860C has 2 drives I see one

Hi Jo,

You might have hardware raid enabled.

# sasmgr get_info -D /dev/sasd0 -q raid

Regards,
Robert-Jan
Andrew Rutter
Honored Contributor

Re: BL860C has 2 drives I see one

hi,

the bl860c has built in hardware raid, this is what you have and can see.

this is visible fron your ioscan output and can be identified by the

HP IR Volume at the end of the line

(HP Integrated Raid Volume)

The two drives will already be mirrored and give you better performance then LVM mirroring

check with robert's command

Andy
Andrew Rutter
Honored Contributor

Re: BL860C has 2 drives I see one

hi,

quickspecs for BL860C here

http://h18000.www1.hp.com/products/quickspecs/12671_na/12671_na.PDF

scroll down to storage controller, and you will see it has raid

Embedded LSI 1068 SAS RAID Controller integrated on system board
Standard RAID 1 controller

Andy
The Brit
Honored Contributor

Re: BL860C has 2 drives I see one

Hi Jo.
I am not a Unix person, however I do have bl860c's. I have seen a problem similar to what you are describing.

Check the part# for your drives. If I was at work I could give you the correct number, but there is a specific set of part#'s for the internal harddrives in bl860c's

The drives which work in Proliant Blades will not necessarily work in Integrity blades.

I installed two of the proliant drives in an integrity blade and had the problem of only being able to see one (from the shell).

I dont know if this is your problem, but it might be worth checking.

HTH

Dave.
Jo Davis
Advisor

Re: BL860C has 2 drives I see one

Is there somewhere that I can find more info in the integrated RAID (LSI 1068) controller.
Torsten.
Acclaimed Contributor
Solution

Re: BL860C has 2 drives I see one

This controller can either present the "plain" disks or (better solution) can provide a hardware mirrored pair (this is what you have) - Integrated RAID = IR.


Download the doc before it is away:

http://docs.hp.com/en/5900-0112/index.html

Hope this helps!
Regards
Torsten.

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Jo Davis
Advisor

Re: BL860C has 2 drives I see one

Thanks, that was very helpfull