Dear Timothy, some USB-bridges are not very suitable for recovering a failing drive. In addition to the limited power supply available for bus powered devices there are also issues with possibly poor error handling done by the bridge. If possible you should try to connect the drive via sata directly.
Does the drive make any sounds (at startup, while running, when you try to access it)? Are any messages referring to sdb or usb in general being logged to dmesg, /var/log/syslog, /var/log/messages, etc.? Also I noticed that you apparently are not using a log file. This is not recommended. Did you read the manual? If your data is important it's really worth spending the time to read it completely. Also if you have sufficient storage I would recommend to recover to an image file first. At a later time you will probably start using other tools to access the data in the recovered image - make sure to use these tools on a copy of your image, so you dont suffer additional data loss because the "repair" activity of some other tool (e.g. a file system check) causes damage to your image file. If you must use a device as destination for recovery make sure that it has been zeroed before you use it. This is especially important if you do not use a log file (which would allow you to zero out the unreadable areas at a later time). Kind Regards Felix Ehlermann -----Ursprüngliche Nachricht----- Von: [email protected] [mailto:[email protected]] Im Auftrag von Tim Johnson Gesendet: Mittwoch, 29. Oktober 2014 15:29 An: [email protected] Betreff: [Bug-ddrescue] Problem using ddrescue I am using ddrescue v 1.17 to try and recover a disk that seems to have had its partition table corrupted. The disk is a 1T Seagate s/n NA4AHSB6 usb 3.0 I have tried running ddrescue to copy the disk onto a backup, both disk-to-disk and disk-to-image, but it fails to do anything. I can see the device with the command "ls /dev/sdb" ( confirmed by dmesg) but it does not appear in fdisk I have run: ddrescue -v -v -v -v -f -n /dev/sdb /dev/sdc /home/timj/Desktop/ddrescue.log: no messages, no logfile created and ps -ax reports no time spent running ddrescue ddrescue -v -v -v -v -f -n /dev/sdb /dev/sdc /media/timj/iomega/seagate.img /home/timj/Desktop/ddrescue.log/ddrescue.log: no messages, no image file, no logfile created and ps -ax reports no time spent running ddrescue ddrescue -v -v -v -v -f -n -R /dev/sdb /dev/sdc /media/timj/iomega/seagate.img /home/timj/Desktop/ddrescue.log/ddrescue.log: no messages, no image file, no logfile created and ps -ax reports no time spent running ddrescue Any advice or is the disk long gone? -- Dr Timothy Johnson Department of Actuarial Mathematics and Statistics and the Maxwell Institute for Mathematical Sciences, School of Mathematical and Computer Sciences Heriot-Watt University Edinburgh EH14 4AS UK tel: +44 (0) 131 451 8343 fax: +44 (0) 131 451 3249 http://www.ma.hw.ac.uk/~timj/ Heriot Watt University is a Charity registered in Scotland, SC000278 ----- We invite research leaders and ambitious early career researchers to join us in leading and driving research in key inter-disciplinary themes. Please see www.hw.ac.uk/researchleaders for further information and how to apply. Heriot-Watt University is a Scottish charity registered under charity number SC000278. _______________________________________________ Bug-ddrescue mailing list [email protected] https://lists.gnu.org/mailman/listinfo/bug-ddrescue _______________________________________________ Bug-ddrescue mailing list [email protected] https://lists.gnu.org/mailman/listinfo/bug-ddrescue
