Device: /dev/sda, 1 Currently unreadable (pending) sectors

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Version vom 2. Mai 2011, 14:07 Uhr von Niki (Diskussion | Beiträge)

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I sometimes get these annoying messages from smartd. They only occur with Samsung HD103SIS SATA disks. According to my google research, these messages are not harmful and a Samsung speciality. One reason for me to avoid Samsung in future. The messages should disappear after a reboot. However, since the disks are built into a RAID1 on a 24x7 server I want to avoid rebooting the server. Instead I can get rid of these messages without a reboot when overwriting the whole disk with zeros. Please click here for details.


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Comments

Niki Hammler meinte …

30. August 2012

One additional comment: The problem is NOT solved by rebooting. It seems that zeroing out is necessary :-(

--Niki Hammler

mike meinte …

26. Dezember 2012

hello! i have /dev/sdb 3TB

how to perform Zeroing the disk for 3TB


cat /dev/zero | pv -s 3000G | dd of=/dev/sda bs=100M


or this is not right ? please show the correct command


I'm afraid to make a mistake


--mike

Niki meinte …

29. Dezember 2012

Are you sure you have the same config as I (RAID1)?

Only in this case my howto makes sense, otherwise you will destroy all your data!!


If you are sure (really sure!) then the disk in the command must match:


cat /dev/zero | pv -s 3000G | dd of=/dev/sdb bs=100M



--Niki

James Hightower meinte …

13. Juni 2013

I think your can skip the zero-ing part. Unless you have write-intent bitmaps enabled, then just removing and re-adding a drive will cause MD to overwrite the entire disk, including your pending-bad blocks. Thiis has worked for me many times. Remember, though, that the SMART Offline_Uncorrectable won't get updated until the next offline collection occours, like with smartctl -t offline.

--James Hightower

Niki meinte …

14. Juni 2013

Dear James,


Thank your for your comment! I will try it our the next time I encounter the message!


Niki

--Niki
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