I am attempting to recover the data from a failing Seagate external hard drive. I was going to attempt using ddrescue or safecopy. I am currently using Kali. The drive will not mount and the output from dmesg is:

[  657.245471] sd 7:0:0:0: Attached scsi generic sg3 type 0

[  657.245713] sd 7:0:0:0: [sdc] Spinning up disk...

[  668.496738] sd 7:0:0:0: [sdc] 732566645 4096-byte logical blocks: (3.00 TB/2.73 TiB)

[  699.452260] sd 7:0:0:0: tag#1 uas_eh_abort_handler 0 uas-tag 1 inflight: CMD IN 

[  699.452270] sd 7:0:0:0: tag#1 CDB: Mode Sense(6) 1a 00 3f 00 04 00

[  743.428575] sd 7:0:0:0: Device offlined - not ready after error recovery

[  743.428602] sd 7:0:0:0: [sdc] Write Protect is off

[  743.428606] sd 7:0:0:0: [sdc] Mode Sense: 00 00 00 00

[  743.428617] sd 7:0:0:0: rejecting I/O to offline device

[  743.428625] sd 7:0:0:0: [sdc] Asking for cache data failed

[  743.428627] sd 7:0:0:0: [sdc] Assuming drive cache: write through

[  743.428636] sd 7:0:0:0: [sdc] Optimal transfer size 268431360 bytes

[  743.448448] sd 7:0:0:0: [sdc] Read Capacity(16) failed: Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK

[  743.448452] sd 7:0:0:0: [sdc] Sense not available.

[  743.448461] sd 7:0:0:0: [sdc] Read Capacity(10) failed: Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK

when I run fdisk -l obviously the device does not show up. I attempted to use safecopy --stage1 /dev/sdc /dev/sdb where sdc is the failing drive as shown in dmesg and sdb is the destination drive. Safecopy fails because it cannot find sdc.

Any thoughts on the way forward. Thank you.

1 Answer 1


First of all, do NOT try to mount the failing disk in write-mode, as this may cause additional damage. Just try to save what you can from it -- this post may help:


  • Thanks, I am attempting to use safecopy vice ddrescue. The process seems to be working, but I am not sure how long safecopy takes using a --stage1 recovery. Safecopy seems to be hungup, however, I cannot tell. I will just let it run and see where it goes from there. Does anyone know the approximate time safecopy takes, or how to determine if it is hung-up?
    – tanker1812
    Mar 21, 2021 at 17:43
  • thanks for the post referral as well. Super helpful.
    – tanker1812
    Mar 21, 2021 at 20:33

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .