The latest in my obsession with SSD’s. I jumped on a $70 deal at NewEgg. I bought it to use as a SLOG (ZIL) in my ZFS server, because of its write speeds and because of its power loss protection.
I immediately updated the MU03 firmware to MU05.
This may be with a SATA II (3 Gbps) cable:
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----------------------------------------------------------------------- CrystalDiskMark 3.0.2 x64 (C) 2007-2013 hiyohiyo Crystal Dew World : http://crystalmark.info/ ----------------------------------------------------------------------- * MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s] Sequential Read : 268.487 MB/s Sequential Write : 144.591 MB/s Random Read 512KB : 252.690 MB/s Random Write 512KB : 144.619 MB/s Random Read 4KB (QD=1) : 23.558 MB/s [ 5751.4 IOPS] Random Write 4KB (QD=1) : 60.558 MB/s [ 14784.8 IOPS] Random Read 4KB (QD=32) : 202.598 MB/s [ 49462.4 IOPS] Random Write 4KB (QD=32) : 122.029 MB/s [ 29792.2 IOPS] Test : 1000 MB [F: 0.1% (0.1/111.7 GB)] (x5) Date : 2014/04/08 22:45:00 OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64) |
Wha? The 4K random write is quite low. Let’s repeat:
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----------------------------------------------------------------------- CrystalDiskMark 3.0.2 x64 (C) 2007-2013 hiyohiyo Crystal Dew World : http://crystalmark.info/ ----------------------------------------------------------------------- * MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s] Sequential Read : 268.109 MB/s Sequential Write : 146.449 MB/s Random Read 512KB : 248.750 MB/s Random Write 512KB : 145.732 MB/s Random Read 4KB (QD=1) : 23.962 MB/s [ 5850.1 IOPS] Random Write 4KB (QD=1) : 76.037 MB/s [ 18563.8 IOPS] Random Read 4KB (QD=32) : 202.476 MB/s [ 49432.7 IOPS] Random Write 4KB (QD=32) : 119.411 MB/s [ 29153.0 IOPS] Test : 1000 MB [F: 0.1% (0.1/111.7 GB)] (x5) Date : 2014/04/08 22:50:44 OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64) |
Little better at 76 MB/s random 4k write, but not the 120 MB/s that I expected.
Let’s try the native SATA III port and a shorter cable:
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----------------------------------------------------------------------- CrystalDiskMark 3.0.2 x64 (C) 2007-2013 hiyohiyo Crystal Dew World : http://crystalmark.info/ ----------------------------------------------------------------------- * MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s] Sequential Read : 477.494 MB/s Sequential Write : 143.072 MB/s Random Read 512KB : 434.218 MB/s Random Write 512KB : 143.168 MB/s Random Read 4KB (QD=1) : 24.571 MB/s [ 5998.7 IOPS] Random Write 4KB (QD=1) : 76.281 MB/s [ 18623.2 IOPS] Random Read 4KB (QD=32) : 232.590 MB/s [ 56784.6 IOPS] Random Write 4KB (QD=32) : 131.644 MB/s [ 32139.6 IOPS] Test : 1000 MB [F: 0.1% (0.1/111.7 GB)] (x5) Date : 2014/04/08 23:08:12 OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64) |
Wow! that sequential read is fast. But, the random write (QD=1) is still disappointing. What gives?
Post Script
Looks like someone else gets similar results, which don’t line up with what TweakTown measured.
Oh, well. The power loss protection is important, and it really only matters how the drive performs in the ZIL. Hopefully, I’ll see closer to 140MB/s rather than 65 MB/s.
Update 2014-04-09
Tried re-running with Intel’s RST driver:
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----------------------------------------------------------------------- CrystalDiskMark 3.0.2 x64 (C) 2007-2013 hiyohiyo Crystal Dew World : http://crystalmark.info/ ----------------------------------------------------------------------- * MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s] Sequential Read : 481.219 MB/s Sequential Write : 142.877 MB/s Random Read 512KB : 430.158 MB/s Random Write 512KB : 144.619 MB/s Random Read 4KB (QD=1) : 27.370 MB/s [ 6682.2 IOPS] Random Write 4KB (QD=1) : 77.415 MB/s [ 18900.1 IOPS] Random Read 4KB (QD=32) : 271.697 MB/s [ 66332.2 IOPS] Random Write 4KB (QD=32) : 142.077 MB/s [ 34686.8 IOPS] Test : 1000 MB [F: 0.1% (0.1/111.7 GB)] (x5) Date : 2014/04/09 22:28:03 OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64) |
Slightly better, but still no 120 MB/s. I have a feeling that something changed with the latest firmware. Wish I had run this before I upgraded.
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