Re: Weird result while smart testing a Winchester Digital drive
Nathan Stratton Treadway <[email protected]>
| Newsgroups | gmane.linux.utilities.smartmontools |
|---|---|
| Message-ID | <[email protected]> |
On Sun, Jul 27, 2014 at 15:21:23 +0200, [email protected] wrote: > User Capacity: 1,000,204,886,016 bytes [1.00 TB] > Sector Size: 512 bytes logical/physical [...] > #14 Extended offline Completed: read failure 90% 14484 4288352511 [...] > > My partitionlayout is: > > > Disk /dev/sda: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors > Units: sectors of 1 * 512 = 512 bytes > Sector size (logical/physical): 512 bytes / 512 bytes > I/O size (minimum/optimal): 512 bytes / 512 bytes > Disklabel type: dos > Disk identifier: 0x07ec16a2 > > Device Boot Start End Blocks Id System > /dev/sda1 * 2048 104447 51200 83 Linux > /dev/sda2 104448 12687359 6291456 82 Linux swap / Solaris > /dev/sda3 12687360 222402559 104857600 83 Linux [...] > /dev/sda12 1491195904 1953525167 231164632 83 Linux > > > With > > 4288352511 / 512 = 8375688 I found that the swap (/dev/sda) > partition has been affected by the bad sector. Note that the "LBA" parameter in the self-test log is expressed in sectors, so you should not divide it by 512 in order to map it into the "Units: sectors" partition table. As Christian pointed out, the LBA value of "4288352511" here is bogus; the correct value must be something below 1953525168 (and thus could be used without any division to find the partition Start-End range it fell between...). > dd if=/dev/zero of=/dev/sda2 bs=512 conv=notrunc > > and it fails with an I/O-error at a certain point. > > Another offline test shows my, that the bad sector was still there (no > remapping). Also note that if the write to the disk succeeds in remapping the sector no I/O error will be generated. Usually the sequence I go through is something like 1) try to read failed sector -> I/O error 2) write to failed sector -> no error (at this point, the Current_Pending_Sector count will have gone down) 3) read sector again -> no error Nathan ---------------------------------------------------------------------------- Nathan Stratton Treadway - [email protected] - Mid-Atlantic region Ray Ontko & Co. - Software consulting services - http://www.ontko.com/ GPG Key: http://www.ontko.com/~nathanst/gpg_key.txt ID: 1023D/ECFB6239 Key fingerprint = 6AD8 485E 20B9 5C71 231C 0C32 15F3 ADCD ECFB 6239 ------------------------------------------------------------------------------ Infragistics Professional Build stunning WinForms apps today! Reboot your WinForms applications with our WinForms controls. Build a bridge from your legacy apps to the future. http://pubads.g.doubleclick.net/gampad/clk?id=153845071&iu=/4140/ostg.clktrk