'Unreadable (pending) sectors'
in [UK Linux]
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From: Martin Gregorie on 8 Apr 2010 18:40 Smartd is reporting Device: /dev/sda, 2 Currently unreadable (pending) sectors on one of me computers. Can anybody explain what this means and how harmful it is or point me at a suitable explanation. The machine has had 1 unreadable (pending) sector for a few months without and apparent problems being caused. The last Smartd test has just reported a second one. -- martin@ | Martin Gregorie gregorie. | Essex, UK org |
From: Gordon Henderson on 9 Apr 2010 03:41 In article <hplm01$1h2$2(a)localhost.localdomain>, Martin Gregorie <martin(a)address-in-sig.invalid> wrote: >Smartd is reporting > >Device: /dev/sda, 2 Currently unreadable (pending) sectors > >on one of me computers. Can anybody explain what this means and how >harmful it is or point me at a suitable explanation. > >The machine has had 1 unreadable (pending) sector for a few months >without and apparent problems being caused. The last Smartd test has just >reported a second one. smartd is asking the drive to do a self-test and report the results - it may not be an actual bad sector, but one that might be marginal. Check the full results with: smartctl -a /dev/sda then force the issue with: badblocks -s -c 256 /dev/sda and see what happens. If it passes, then you're probably OK - for a while. But be prepared to change the disk. Gordon
From: Martin Gregorie on 9 Apr 2010 12:58 On Fri, 09 Apr 2010 07:41:37 +0000, Gordon Henderson wrote: > In article <hplm01$1h2$2(a)localhost.localdomain>, Martin Gregorie > <martin(a)address-in-sig.invalid> wrote: >>Smartd is reporting >> >>Device: /dev/sda, 2 Currently unreadable (pending) sectors >> >>on one of me computers. Can anybody explain what this means and how >>harmful it is or point me at a suitable explanation. >> >>The machine has had 1 unreadable (pending) sector for a few months >>without and apparent problems being caused. The last Smartd test has >>just reported a second one. > > smartd is asking the drive to do a self-test and report the results - it > may not be an actual bad sector, but one that might be marginal. > > Check the full results with: > > smartctl -a /dev/sda > Oddly, this only reported a single unreadable (pending) error. > then force the issue with: > > badblocks -s -c 256 /dev/sda > Didn't find any bad blocks. > and see what happens. If it passes, then you're probably OK - for a > while. > Yep, looks like this is the case. Thanks, Gordon. I've filed your advice for future reference. -- martin@ | Martin Gregorie gregorie. | Essex, UK org |
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