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HP Storageworks MSA1500 - Array question

Posted on 2006-06-28
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Last Modified: 2008-01-09
MSA 1500 with MSA30 SCSI enclosures:

How many actual arrays can be created within a single storage enclosure?  I figured there would be a limit, but I create three so far.  So if there's 14 bays, can 7 Raid1 arrays actually be created?  Any recommendations or limitations?  Thanks in advance.
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Question by:rvthost
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by:Psyco_666
ID: 17007910
The limit would not be set by the enclosure, it will be down to your RAID card. What RAID card are you using?
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mutley69 earned 1500 total points
ID: 17008159
Within the enclosure you can create as many raid-containers as your disks allow you to do so - with raid-1 it may be limited to 7 as you say in your message (i'm not going to talk about efficiency - you may have reasons to do it this way).

I don't know what the impact on the caching and so on will be - but feel free to ask HP about how their technical people think about it.
I've a good feeling when it comes to their knowledge (in Belgium).

good luck
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by:rvthost
ID: 17008986
Thanks for your comments.  I did submit a case to HP last night and they responded this morning with some great info.

HP WROTE:
"The MSA1500cs can have a total of 4 MSA30 enclosures attached, with the maximum amount of raw capacity being 16.8 TB.  The limitation of the MSA1500 when creating arrays is there can only be a maximum of 32 logical drives.  These 32 logical drives can be 32 separate arrays, or you can have 32 separate logical drives in 1 array.  To answer your question regarding 7 different Raid 1 arrays, yes, it is possible to do this in the single storage enclosure as long as you do not exceed 32 logical drives.  Please note that these 32 logical drives are a total for all enclosures attached to the MSA1500.  Also, when creating your logical drives the maximum logical drive size is 2TB, and this cannot be exceeded.  Both of these values (32 LUNs, 2TB maximum per LUN) are limitations of the MSA controller."
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