topic SA-641 and two raid sets in HPE ProLiant Storage Systems

SA-641 and two raid sets

Rossiau — Wed, 22 Sep 2004 08:31:21 GMT

Hello,

Maybe stupdid question but is it possible to have a RAID-1 (OS) and a RAID-5 (userdata) set on a Smart Array 641 (single channel)?

I know it is possible to use RAID 0+1 but does this also mean that you can have two seperate RAID sets on this controller, being low budget and so?

Thanks in advance.

Jos Rossiau

Re: SA-641 and two raid sets

JohnWRuffo — Wed, 22 Sep 2004 11:41:14 GMT

The SmartArray 641 can run a total of 6 disks in a number of configurations.

You can have a root mirror (two drives) and a RAID5 data array (3 drives) and a hot spare for both arrays or make a 4 drive RAID5

Yes, you can have two arrays on the controller through one SCSI Channel.

http://h18004.www1.hp.com/products/quickspecs/12067_na/12067_na.html
Single Channel--Provides the ability to support up to 6 drives or 1.80 TB

Re: SA-641 and two raid sets

Nick Walton — Thu, 23 Sep 2004 10:09:18 GMT

Just to illustrate John's excellent answer:

I just built a ML350 G4 server with a 641 array controller. I used 6 x 18 GB drives in the drive cage. I configured two arrays:

1) A RAID 1 mirror using 2 drives for the operating system and applications.

2) A RAID 0+1 array using the other 4 drives for data (Exchange server databases).

HTH.

Re: SA-641 and two raid sets

Rossiau — Mon, 27 Sep 2004 01:48:59 GMT

Thanks for the quick reply.

I suspected that it should be possible, but the one channel thing made me a bit nervous about it.

I can safely choose the SA-641 for our server then.

Greetings,

Jos

Re: SA-641 and two raid sets

Rossiau — Mon, 27 Sep 2004 01:51:46 GMT

Yes it is possible to have more RAID sets on the SA-641 with only one channel.

Thanks for clearing up the misunderstanding on my part.