On Dec 2, 2017 02:39, <customersupport@xxxxxxxxxxxxxx> wrote:
>
>
> There is no fsck function available, and I failed to copy the image and
> reinstall to a reformated partition- as explained below.
Using fsck when there are IO errors would cause even more data lost.
>
> I get an I/O error "Error while mounting... Input/output error"
>
> output of dmesg
>
>
> [ 3521.639526] NILFS (sdb2): mounting unchecked fs
> [ 3524.672660] ata2.00: exception Emask 0x0 SAct 0x3e000 SErr 0x0 action 0x0
> [ 3524.672668] ata2.00: irq_stat 0x40000008
> [ 3524.672673] ata2.00: failed command: READ FPDMA QUEUED
> [ 3524.672681] ata2.00: cmd 60/40:68:c0:5d:ba/05:00:e3:00:00/40 tag 13
> ncq dma 688128 in
> res 41/40:00:e0:60:ba/00:00:e3:00:00/40 Emask
> 0x409 (media error) <F>
> [ 3524.672684] ata2.00: status: { DRDY ERR }
> [ 3524.672687] ata2.00: error: { UNC }
> [ 3524.686112] ata2.00: configured for UDMA/133
> [ 3524.686206] sd 1:0:0:0: [sdb] tag#13 FAILED Result: hostbyte=DID_OK
> driverbyte=DRIVER_SENSE
> [ 3524.686210] sd 1:0:0:0: [sdb] tag#13 Sense Key : Medium Error [current]
> [ 3524.686213] sd 1:0:0:0: [sdb] tag#13 Add. Sense: Unrecovered read
> error - auto reallocate failed
> [ 3524.686218] sd 1:0:0:0: [sdb] tag#13 CDB: Read(10) 28 00 e3 ba 5d c0
> 00 05 40 00
> [ 3524.686221] print_req_error: I/O error, dev sdb, sector 3820642528
> [ 3524.686272] ata2: EH complete
When you see this message in the log, your best bet is to use ddrescue
to copy thee disk onto a new one and try to mount again. Anything else
will only damage the disk even more.
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