tool for mapping away bad blocks on an external disk

[Matthias Apitz]

Hello,

I have an older external disk, connected through USB, which has bad
blocks:

Apr 17 09:16:38 c720-r292778-amd64 kernel: ugen0.3: <Freecom> at usbus0
Apr 17 09:16:38 c720-r292778-amd64 kernel: umass0: <Bulk Only Interface> on usbus0
Apr 17 09:16:38 c720-r292778-amd64 kernel: umass0:  SCSI over Bulk-Only; quirks = 0x0100
Apr 17 09:16:38 c720-r292778-amd64 kernel: umass0:1:0: Attached to scbus1
Apr 17 09:16:38 c720-r292778-amd64 kernel: da0 at umass-sim0 bus 0 scbus1 target 0 lun 0
Apr 17 09:16:38 c720-r292778-amd64 kernel: da0: <Freecom Hard Drive XS 1.00> Fixed Direct Access SCSI-2 device
Apr 17 09:16:38 c720-r292778-amd64 kernel: da0: Serial Number FAFFFFF0FDF1F6F90FA46017
Apr 17 09:16:38 c720-r292778-amd64 kernel: da0: 40.000MB/s transfers
Apr 17 09:16:38 c720-r292778-amd64 kernel: da0: 1430799MB (2930277168 512 byte sectors)
Apr 17 09:16:38 c720-r292778-amd64 kernel: da0: quirks=0x2<NO_6_BYTE>


# fsck /dev/da0s1a 
** /dev/da0s1a
** Last Mounted on /
** Phase 1 - Check Blocks and Sizes

CANNOT READ BLK: 1512063104
CONTINUE? [yn] y

THE FOLLOWING DISK SECTORS COULD NOT BE READ: 1512063180, 1512063219,

CANNOT READ BLK: 1794212160
CONTINUE? [yn] 

Do we have some good tool to perform an analyse of the full disk and map
away all bad blocks? There is no important data on this disk and if I
can not get rid of the bad blocks I must throw it to dustbin.

Thanks

	matthias

-- 
Matthias Apitz, ✉ guru at unixarea.de, ⌂ http://www.unixarea.de/  ☎ +49-176-38902045