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Array Configuration

Scott Watkins
Occasional Visitor

Array Configuration

Hi all,
My company just purchased a ML530 w/10 drives and a 2 channel 6x series Smart Array Controller. I would like to know if its possible to configure the following using the default ACU:

disk 1 & 2 - RAID1 (mirror the OS)
disk 3,4,5,6,7 - RAID5 (Databases)
disk 8 & 9 - RAID 1 (mirror log files)
disk 10 - SPARE

Thanks in advance!
5 REPLIES
Doug de Werd
Honored Contributor

Re: Array Configuration

shouldn't be any problem. just configure it that way in the ACU

Thanks,
Doug
Expert in ProLiant Clusters
Gordon Leonard
Honored Contributor

Re: Array Configuration

This is not an optimum configuration. Best performance would be obtained by adding one more disk then taking disk 1-10 and creating ONE array [Note you could also use one less disk the array must contain an even number if disk]. From this you should create your arrays (Size and RAID type). Use disk 11 as a hot spare.

This will provide maximum performance since the bottleneck to storage is the hard disk.

General rule of thumb:
Load balance across all channels (you can RAID across channels not cards)
Use as many drives as possible to create and array
Create Logical drive from the array set.

Scott Watkins
Occasional Visitor

Re: Array Configuration

I should have stated, this is for Exchange Server 2003. Which I understand runs best with this configuration... thoughts?
Doug de Werd
Honored Contributor

Re: Array Configuration

You might find some useful info on the HP Active Answers web site

http://h71019.www7.hp.com/ActiveAnswers/Render/1,1027,6183-6-100-225-1,00.htm

Thanks,
Doug
Expert in ProLiant Clusters
Gordon Leonard
Honored Contributor

Re: Array Configuration

All HP Smart controllers support Virtual RAID.

Your confusing Array and RAID.

Using an EVEN number of drives create an ARRAY.

*Then*

Create your logical drives (enter the size and the RAID type â 0, 1, 5, 5ADG).

**Example**
Drive 1 â 100MB
Drive 2 â 100MB
Drive 3 â 100MB
Drive 4 â 100MB

Add 1-4 to ARRAY A (400MB RAW Space)

Create Logical Drive (Logical Drive 1, 50MB RAID 1).

You now have ARRAY a with 300MB RAW space and one drive 50MB-RAID 1 (50MB mirror requires 100MB RAW).

Now you can create a Logical drive with X space using RAID 5.

You have just created 2 virtual RAID sets â you do not need to tie physical drives to RAID sets. This allows for maximum performance since I use ALL the drives for