Critical Design Flaw Found in WD Caviar Green HDDs

[D749]

TLER is the big issue with breaking the raids on higher capacity drives, parking/unparking the heads should be consistently fast enough not to break a raid.

Not to get off topic but is TLER required for RAID10? I'm trying to figure out if I have to go with the RE4 drives (which support TLER) for my future RAID10 setup with 2TB drives. Thanks.

[IanB]

Not to get off topic but is TLER required for RAID10? I'm trying to figure out if I have to go with the RE4 drives (which support TLER) for my future RAID10 setup with 2TB drives. Thanks.

Ask yourself why you are building a RAID 10. You want reliability - that's the mirror part. RE class drives are an order of magnitude more reliable (bit error rates). You want speed - that's the stripe part. RE4 drives are intrinsically faster than standard greens. And they are designed to run properly in RAID.

OK, you are going to pay more for that reliability, but surely that's worth it long-term (less disk replacements) if you're considering such a setup? So if you're not looking for an as-cheap-as-sh*t RAID solution, but you want the speed and reliability you expect from this setup, why on earth would you NOT want the RE4s?