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

[Volker Armin Hemmann <volkerarmin@googlemail.com>]

Am 26.07.2014 12:26, schrieb 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
>
> Sorry for stuutering postings...overlocked this one:
> #>dd if=/dev/zero of=/dev/sda2 bs=512 conv=notrunc
> dd: error writing ‘/dev/sda2’: Input/output error
>
> Hrrrmpfff...
>
> Why does it nt remap those ones?
>
> Best regards,
> mcc
>
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smartctl -a /dev/sda

without those information: crystal ball.

that said: it is swap. You shouldn't have to do anything. Don't touch dd.