Junichi Saito (
Wed, 18 Feb 1998 14:15:12 +0100 (CET)

Thank you for your answer.

On Wed, 18 Feb 1998, Alan Cox wrote:

>> Is a disk definitely lost after the following error ?
>Not always
>> scsi0: MEDIUM ERROR on channel 0, id 6, lun 0, CDB: Request Sense 00 00 00
>> 10 00
>> Current error sd08:01: sense key Medium Error
>> scsidisk I/O error: dev 08:01, sector 2, absolute sector 3
>> EXT2-fs: unable to read superblock
>> mount: wrong fs type, bad option, bad superblock on /dev/sda1,
>> or too many mounted file systems
>A medium error is indeed a disk error but there are things you can do.
>Firstly the superblock is duplicated at block 8193 and other places.
>Try doing a e2fsck -b 8193 /dev/sda1
>You may also want to run a scsi verify of the disk ( its often in
>the controller bios, I dunno if anyone ever wrote a linux native tool
>for this)

I tried the 'e2fsck -b 8193 /dev/sda1' suggested and could retrieve some
files. But while I was trying to retrieve files, the same error message
reappeared and the disk became unusable again.

                  Junichi Saito <>

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