I had many HDD failures with LSI controllers but this is the first time I get such a notification. Should I worry more than the usual?
Meantime I have replaced the faulty HDD, it synced and the array is now Optimal.
1. Is this probable to have caused any filesystem errors? Or it's just a normal faulty HDD warning?
2. Can I find out what file(s) may has/have been affected?
3. Is there something specifically I need to do to get such a warning each time I have a faulty HDD in my arrays?
Are you using drives on the HCL? Enterprise drives?
That error looks like a write failed due to a bad sector or perhaps failed twice due to two bad sectors in a row. I'm speculating - LSI support can advise you better and maybe somebody else here will know for sure.
Make sure you use enterprise-level disks (or otherwise disks with TLER disabled) or you will always have drives dropping from time to time. Desktop grade disks will never work reliably over time with LSI cards.
The issue is that with TLER enabled and the disks reaches a bad sector, the disk tries to correct the problem itself instead of letting the RAID card do it. When the RAID card tries to correct (relocate) the sector, the disk is unresponsive trying to deal with the error itself... then, bam, it's kicked out of the array since it's not responding.
Sector relocation/errors are VERY normal for spinning disks. Anyone who has luck with modern desktop disks on RAID cards is just lucky -- the drives just haven't encountered errors or they aren't under enough load for the RAID card to notice.
Last edited by FastServ; 12-13-2013 at 06:59 PM.
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