On 22/09/2009, at 9:35 AM, Bazooka Joe wrote:
> I have a usb hd that I use for backup. Occasionally it dies.
>
> scsi 6:0:0:0: rejecting I/O to dead device
> scsi 6:0:0:0: rejecting I/O to dead device
> scsi 6:0:0:0: rejecting I/O to dead device
> scsi 6:0:0:0: rejecting I/O to dead device
> Buffer I/O error on device sdc1, logical block 0
> lost page write due to I/O error on sdc1
> EXT2-fs error (device sdc1): read_inode_bitmap: Cannot read inode
> bitmap - block_group = 129, inode_bitmap = 4227073
> scsi 6:0:0:0: rejecting I/O to dead device
> scsi 6:0:0:0: rejecting I/O to dead device
> scsi 6:0:0:0: rejecting I/O to dead device
> Buffer I/O error on device sdc1, logical block 0
> lost page write due to I/O error on sdc1
> EXT2-fs error (device sdc1): ext2_readdir: bad page in #2
> scsi 6:0:0:0: rejecting I/O to dead device
> scsi 6:0:0:0: rejecting I/O to dead device
> Buffer I/O error on device sdc1, logical block 0
> lost page write due to I/O error on sdc1
> EXT2-fs error (device sdc1): ext2_get_inode: unable to read inode
> block - inode=2, block=1027
> scsi 6:0:0:0: rejecting I/O to dead device
> scsi 6:0:0:0: rejecting I/O to dead device
> Buffer I/O error on device sdc1, logical block 0
> lost page write due to I/O error on sdc1
> EXT2-fs error (device sdc1): ext2_readdir: bad page in #2
>
> If i unmount it and try to remount it it says sdc1 does not exist.
>
> I am not at the location so physically unplugging then replugging in
> the drive isn't a convenient option.
>
> How can I get the os to rescan the usb device so I can remount?
The sg_reset command might work:
http://linux.die.net/man/8/sg_reset
Oliver
>
> thx
> bazooka
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