Re: [gentoo-user] [OT] Badblocks on my harddisk

[meino.cramer@gmx.de]

Mick <michaelkintzios@gmail.com> [14-07-26 11:28]:
> On Saturday 26 Jul 2014 02:49:15 meino.cramer@gmx.de wrote:
> > Hi,
> > 
> > After running smartctl for an extended offline test I got
> > a badblock (information extracted from the report):
> > 
> > SMART Self-test log structure revision number 1
> > Num  Test_Description    Status                  Remaining  LifeTime(hours)
> >  LBA_of_first_error # 1  Extended offline    Completed: read failure      
> > 90%     14460         4288352511 197 Current_Pending_Sector  0x0032   200 
> >  200   000    Old_age   Always       -       1
> > 
> > I found a explanation to map the LBA to a partition here:
> > http://smartmontools.sourceforge.net/badblockhowto.html
> > 
> > My partition layout is:
> > #> sudo fdisk -lu /dev/sda
> > 
> > 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/sda4        222402560 1953525167 865561304   5 Extended
> > /dev/sda5        222404608  232890367   5242880  83 Linux
> > /dev/sda6        232892416  442607615 104857600  83 Linux
> > /dev/sda7        442609664  652324863 104857600  83 Linux
> > /dev/sda8        652326912  862042111 104857600  83 Linux
> > /dev/sda9        862044160 1071759359 104857600  83 Linux
> > /dev/sda10      1071761408 1281476607 104857600  83 Linux
> > /dev/sda11      1281478656 1491193855 104857600  83 Linux
> > /dev/sda12      1491195904 1953525167 231164632  83 Linux
> >                 4288352511  <<< The number reported by smartctl
> > 
> > 
> > Following the linked document...
> > It seems the bad LBA is not on the checked harddisk.
> > 
> > Or (more obvious) I did something wrong...
> 
> You are probably comparing different units.  The Start and End of fdisk are 
> reporting sectors, each sector being 512 bytes.  Therefore if the LBA is 
> reported by smartctl in bytes, you have:
> 
> 4,288,352,511 ÷ 512 = 8,375,688.5
> 
> which would place it within your swap partition.
> 
> I would do this:
> 
>  swapoff /dev/sda2
> 
>  dd if=/dev/zero of=/dev/sda2 bs=512 conv=notrunc
> 
>  mkswap -L swap -c /dev/sda2
> 
>  swapon /dev/sda2
> 
> and hopefully the problem will be gone when you run the next smartctl test.
> 
> -- 
> Regards,
> Mick

Hi MIck, 

thanks a lot for the clearification!

It also solves "the problem", that fsck does not report any problem
for the partitions...because there is none ;)
Which are good news.

I will clear the swap and report later what happens!

Best regards and have a nice weekend!
mcc