How can you tell which HDD is failing in RAID-0?

Hello. I have 2 Western Digital black 7200rp 640GB in RAID-0

CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World :
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 48.106 MB/s
Sequential Write : 31.784 MB/s
Random Read 512KB : 22.920 MB/s
Random Write 512KB : 23.561 MB/s
Random Read 4KB (QD=1) : 0.419 MB/s [ 102.3 IOPS]
Random Write 4KB (QD=1) : 0.726 MB/s [ 177.3 IOPS]
Random Read 4KB (QD=32) : 0.972 MB/s [ 237.2 IOPS]
Random Write 4KB (QD=32) : 0.671 MB/s [ 163.7 IOPS]

Test : 4000 MB [C: 23.8% (284.0/1192.0 GB)] (x3)
Date : 2011/09/11 18:12:42
OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64)

Western Digital Lifeguard Test:
SMART status Fail.

Ok something is wrong here. How can I see which HDD is failing. I am not sure if it could just be 1 or both, I just don't know.
The guy that built my computer says it's the mobo that is not accepting my RAID-0 set up. (ASUS M3A78-CM)
6 answers Last reply
More about failing raid
  1. wow no one is really that helpful on this site.
  2. don't judge too fast, i have no experience with storage really but i will try to answer you as far as i know as i set up a RAID10,5,0 Arrays :)
    for the RAID0 array you'v set up if the status is Fail you gotta back up your data and reassign the array from the beginning as long as you won't be able to re-build a raid0 array
    for the low scores you had with crystal disk mark, i suggest you do a clean format and try to benchmrak each drive alone then put them back on a RAID0 and see what happens
  3. thank you I will try this and get back to you.
  4. infestedchris said:
    thank you I will try this and get back to you.

    ok, it's 6 AM now i guess it's time to sleep :D, just wait for a reply and people with more experience than me will answer you clearly on this section
  5. instead of using WD tools to test the raid... Disconnect one hdd and run the test to see which on if failing.
  6. AIUI, Data LifeGuard can't see a physical drive that is a member of a RAID. Therefore I suspect that the SMART failure is a false error.
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