Poor Raid0 benchmarks for intel x25 g2
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11-06-2009 07:39 AM
Shouldn't I be seeing a read average of about 400+ for hd tune here? This is set up in a dell xps8000 raid 0 with 128 blocks on Win7. Thanks for any Help.
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11-07-2009 01:16 AM
Your experience after having done a clean reinstall of Win7 certifies what I previously have written: Nothing will be changed.
Here is my comment:
1. Your RAID0 benchmark results are not as poor as you think. I didn't see any similar read speeds with a non-RAID SSD system.
2. Wait for the upcoming bug-free Intel SSD firmware, flash it into your SSD and redo a benchmark.
3. As long as we don't get an Intel RAID driver, which is able to give the TRIM command to the SSD, our SSD RAID systems will not be perfect.
Notice:
This is the way I have partitioned my 2x160 GB RAID:
Drive0: Boot partition (size: 8 GB, containing the MBR and the pagefile)
Drive1: Win7 x64 partition (size: 70 GB, no pagefile)
Drive2: another OS partition (size: 70 GB, no pagefile)
Drive3: Data partition (size: 150 GB)
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11-07-2009 07:48 AM
Here is what HD tune looks like when I set HD tune block size to 512kb(compared to the 64kb default). Why is there such a huge variation in read performance with these settings?
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11-08-2009 07:59 AM
strip size?
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11-09-2009 06:10 PM
Stripe size is 128.
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11-10-2009 03:34 PM
I *think* with a strip size of 128KB that it reads/writes 128KB for the 64KB block size test. Another factor may also be the page and block sizes of the SSD. Hopefully somebody with more expertise can confirm this??
I also have RAID0 running on 2 160GB g2 drives under windows 7. My read transfers are:
64KB block = 172 MB/sec
128KB block = 225 MB/sec
512KB block = 418 MB/sec
1MB block = 450 MB/sec
As for driver I am using c:\Windows\system32\DRIVERS\iaStorV.sys version 8.6.2.1012 (comes with OS)
7.9 for disk transfer under Windows Experience is nice but franky I am scared to make any changes since it's rather uncertain re X25M firmware and support for SSDs in RAID under Storage Manager appears to be lacking.
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