[CentOS] rescan usb hd

Bazooka Joe

fastfish at gmail.com
Tue Sep 22 00:05:57 UTC 2009


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?

thx
bazooka



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