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I want use SSD drives in RAID 1 setup. Although performance is important, reliability comes first, so I'm going with Intel drives (either the 320 or 510 series).

This will be installed in a Dell 435T/9000 that has the Intel Matrix Storage ROM on the motherboard. The PC is about 1.5 years old, so it is SATA II, not SATA III.

From what I have read, TRIM is not supported in RAID setups for SSD drives.

Here are my questions:

  1. What issues will I run into using these SSD drives in RAID 1?
  2. Is there a substitute for TRIM for RAID 1?
  3. Does read or write performance decline in RAID 1, if so, by how much?
  4. Am I better off using Windows 7 software RAID 1 because that would allow TRIM support?
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migrated from serverfault.com Sep 22 '11 at 15:46

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1 Answer 1

up vote 2 down vote accepted

Trim is not normally support by hardware RAID controllers, because it's a command that has to come from the operating system level. But you might have luck with a software raid setup, because then the operating system still sees and knows about the individual disks first, and the raid array second. I wouldn't hold my breath, though, and I don't know how you'd test it.

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Any idea on the performance hit going to software vs hardware RAID 1? I'm assuming since TRIM would be supported that there is performance gain for SSD using software RAID. –  Josh Sep 22 '11 at 16:09
    
Very, very little performance hit for software RAID nowadays. –  BBlake Sep 22 '11 at 17:20
    
Testing if TRIM is enabled "should be" easy, Intel has the SSD Toolbox that tests if TRIM is turned on. This assumes that it can see both drives of course. –  Josh Sep 22 '11 at 18:09
2  
@Josh did you find out if TRIM was enabled? –  oleschri Apr 16 '12 at 12:38

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