topic RAID0 using SAS disk controller in rx2660 server in Integrity Servers

RAID0 using SAS disk controller in rx2660 server

Adrian Jang — Mon, 23 Mar 2009 00:48:29 GMT

Hello,

I have a rx2660 server with a SAS disk controller. It contains four disks (see below):

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

Mon Mar 23 12:32:18 2009

---------- PHYSICAL DRIVES ----------
LUN dsf SAS Address Enclosure Bay Size(MB)

/dev/rdsk/c1t0d0 0x5000c500092b0bc1 1 5 140014
/dev/rdsk/c1t1d0 0x5000c5000eb5d9c9 1 6 140014

---------- LOGICAL DRIVE 7 ----------

Raid Level : RAID 1
Volume sas address : 0xa053006191ac0d8
Device Special File : /dev/rdsk/c1t2d0
Raid State : OPTIMAL
Raid Status Flag : ENABLED
Raid Size : 139898
Rebuild Rate : 0.00 %
Rebuild Progress : 100.00 %

Participating Physical Drive(s) :

SAS Address Enc Bay Size(MB) Type State

0x5000c5000eb57975 1 8 140014 SECONDARY ONLINE
0x5000c5000eb57efd 1 7 140014 PRIMARY ONLINE

I'm trying to configure the disks in bays 5 and 6 into a *striped* (i.e. RAID0) array, but this doesn't seem possible, i.e.

# sasmgr add -D /dev/sasd0 -q raid -q level=0 -q enc_bay=1:5,1:6
ERROR: Unsupported RAID Volume level: Operation not supported

Does anyone know whether what I'm attempting is possible and, if so, the command to use?

Thanks.

Re: RAID0 using SAS disk controller in rx2660 server

Torsten. — Mon, 23 Mar 2009 04:12:01 GMT

The system already told you - this is unsupported. You can only built 2 pairs of mirrored disks.

Re: RAID0 using SAS disk controller in rx2660 server

Adrian Jang — Mon, 23 Mar 2009 04:17:48 GMT

Is there any way in which I can configure two (or more) *striped* internal disks in the rx2660 server, using the SAS RAID controller? Or do I need to attach an external disk array?

Re: RAID0 using SAS disk controller in rx2660 server

Stefan Stechemesser — Mon, 23 Mar 2009 12:15:50 GMT

Hi,

correct. It is impossible to configure striping with the (default) LSI SAS HBA in the rx2660.

But there is no need to order an external diskarray that cannot be connected to the same SAS controller anyway.

What you are looking for is to order the P400 Smartarray SAS controller which is an optional controller to access the internal disks of the rx2660.
With this P400 Smartarray Controller you can make RAID0 (and several other Raid types).

See also:
for "8-port SAS Smart Array P400 Controller Card" option:
http://h20341.www2.hp.com/integrity/cache/452309-0-0-0-121.html

and for the manual of the same:
http://docs.hp.com/en/J6369-90072/index.html

best regards

Stefan

Re: RAID0 using SAS disk controller in rx2660 server

Adrian Jang — Wed, 29 Apr 2009 00:46:52 GMT

Thanks for the responses. Apologies for the delay with this reply. I was waiting to communicate with a HP Sales Rep to obtain advise re a new RAID controller. Haven't done so yet, but a new RAID controller is the only way.