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Both the WD and Segate green drives have newegg comments that they shouldn't or not meant to be used for RAID. Why? I wanted to put 3x2 TB in a ZFS raidz, is that ok or some how wear these drives out fast?
Thanks for the info.
What about software RAID like ZFS? Also I don't understand why it would work in RAID 1, but not RAID 5?
Do i need to use TLER or RAID edition harddrives?
No and if you use TLER you should disable it when using ZFS. TLER is only useful for mission-critical servers who cannot afford to be frozen for 10-60 seconds, and to cope with bad quality RAID controller that panic when a drive is not responding for multiple seconds because its performing recovery on some sector. Do not use TLER with ZFS!
Instead, allow the drive to recover its errors. ZFS will wait, the wait time can be configured. You won't have broken RAID arrays, which is common with Windows-based FakeRAID arrays.
RAID 5 on a software RAID is about the worst in terms of both performance and reliability. And when one drive drops out, it would take days or even weeks to rebuild that array - and during the rebuilding, the CPU utilization would be high enough to prevent using the computer at all even for non-critical use.
RAID 5 on a software RAID is about the worst in terms of both performance and reliability. And when one drive drops out, it would take days or even weeks to rebuild that array - and during the rebuilding, the CPU utilization would be high enough to prevent using the computer at all even for non-critical use.
Regarding ZFS:
Do i need to use TLER or RAID edition harddrives?
No and if you use TLER you should disable it when using ZFS. TLER is only useful for mission-critical servers who cannot afford to be frozen for 10-60 seconds, and to cope with bad quality RAID controller that panic when a drive is not responding for multiple seconds because its performing recovery on some sector. Do not use TLER with ZFS!
Instead, allow the drive to recover its errors. ZFS will wait, the wait time can be configured. You won't have broken RAID arrays, which is common with Windows-based FakeRAID arrays.
from http://hardforum.com/showthread.php?t=1500505
This is FUD. Rebuilding an array is not that intensive on the CPU - you READ from a few drives and write to ONE drive. And in the case of ZFS it is way more reliable than a hardware RAID5. Most people today use raidz2 to adress the real problem here - a disk failure in the middle of a recovery.
I wrote that text; a long time ago though. But it still applies:I have no idea why someone would write this. TLER does not make a huge difference on a day to day basis on ZFS - but on failing drives I would much rather have errors occur that is detectable, than a drive trying to fix them for me with terrible performance as a result.