MD3000 Performance

[Barry Allard]

Hi Guys,

Contact Max_Stemple at Dell.com and he'll know which dept to send you to.  

We have an MD3000 15x300GB pseudo-10k hooked up to a couple of 1950's. So
far, we're still testing it with Bonnie++ and iozone on RHEL 4/5 x86_64.
Ignoring the unusually-low design limit of 2 TB per LUN, this thing should
be fast.  Hopefully, Dell will support their products better by releasing
some performance optimization docs.  

Also, I wonder the performance of this compares to DAS enclosures from other
vendors?

Barry

-----Original Message-----
From: linux-poweredge-bounces at dell.com
[mailto:linux-poweredge-bounces at dell.com] On Behalf Of Andrey Dmitriev
Sent: Wednesday, July 18, 2007 1:29 PM
To: linux-poweredge at dell.com
Subject: MD3000 Performance

All,

We have an MD3000 with 8x15K SAS drives. I could not push this thing 
beyond 100 megs per second, in any RAID configuration (including RAID0). 
Which was kind of sad to me, b/c the 2950 it's attached to can do 
150-200 with raid5.

Anyone has a clue? Dell support so far has been pretty helpless, and 
they've been 'working on it' for about a month. They were not able to 
tell me how they achieved 1400Megs/sec.

I don't think it's a bad array, but it obviously doesn't seem to scale 
well with new spindles, as speeds were about the same with half disks or 
all disks in a RAID, which seems to indicate to be either a controller 
or a SAS card bottleneck.

-andrey

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