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Discussion on Article:
LSI MegaRAID SAS 9260-8i Controller Review

Started by: iieeann | Date 12/07/09 05:06:58 PM
Comments: 3 | Last Comment:  01/11/10 06:56:45 AM

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1. 
What is the POST time for this card?
0 0 [Posted by: iieeann  | Date: 12/07/09 05:06:58 PM]
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36 sec
0 0 [Posted by:  | Date: 01/11/10 06:56:45 AM]
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2. 
What is the reason for using the 64kb default stripe size?

In my (limited) experience using this card so far, I found far better results using a stripe size of 256k or 512k.

I currently have an 8 disk SATA Raid-0 array running off this card inside vmware esx 4.0. Using iometer I was able to generate 670 megabyte/sec read speed using a 100% sequential, 100% random, 4kb block size iometer test.

In fact, here are the other stats I came up with:

8x1.5TB Raid-0, 512kb stripe

**bonnie++ test**:
836mb/sec write,651mb/sec read,299cps, default block size

*IOMETER tests**:
a) 100% random, 100% read, 100 outstanding io, 4kb block
IOPS=167791
Tot.MB/sec=657
b) 100% sequential, 100% read, 100 outstanding io, 4kb block
IOPS=172442
Tot.MB/sec=673mb
c) 100% random, 100% read, 100 outstanding io, 512byte block
IOPS=175202
Tot.MB/sec=85.5mb/sec
d) 100% seqential, 100% read, 100 outstanding io, 1 mb block
Tot.MB/sec=5569mb/sec
IOPS=5569
e) 100% sequential, 100% write, 100 outstanding io, 4kb block
IOPS=107307
Tot.MB/sec=419mb/sec
f) 100% random, 100% write, 100 outstanding io, 4kb block
IOPS=1332
Tot.MB/sec=5.21mb/sec
g) 100% random, 100% write, 100 outstanding io, 512bytes block
IOPS=1663
Tot.MB/sec=0.81mb/sec
h) 100% random, 100% write, 100 outstanding io, 64kb block
IOPS=1481
Tot.MB/sec=92.6mb/sec
i) 100% random, 100% write, 100 outstanding io, 1mb block
IOPS=488
Tot.MB/sec=488mb/sec


My only thought is that I am running a more recent firmware release.
0 0 [Posted by: ecsrun  | Date: 12/14/09 01:45:37 PM]
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