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How to tell ddrescue to skip large portion of the disk mid-way recovery

Almost formatted my main disk with GParted. Is it safe to reboot?Can I use testdisk to recover the Windows partition over which Ubuntu was installed?Mounting ddrescue image after recovery (in over my head)rollback GPT after failed 13.10 installationUbuntu installation went wrongDuring boot, 18.04.1 no longer automounts external USB drive at /media/usb0Using ddrescue to recover hard drive - Don't know if image is being createdDDRESCUE - How to re-run first pass (don't do reverse yet)?

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I am doing a 1TB partition recovery from /dev/sdX3 to a file on a different disk. I am running booted from Live Ubuntu usb.

ddrescue was initially run with simple:
ddrescue --no-scrape /dev/sdc3 /target/sdc3.mg /target/sdc3.log

Eventually around 700GB it got to a place on disk where it gets a lot of sector errors. After 10-15 of those the disk goes offline and the usb host gets reset. The only way to get it back is to power down the disk, unplug USB and then power up and plug it back in. I am not making any progress on the remaining 300gb.

I wanted to skip 100gb or so to get the most from the disk. So I tried to specify "-i 800000000000". This allowed the recovery to work a bit but I noticed that journal/log file got completely wiped out and the image seems different now too (smaller).

Luckily I have saved prior image/log so I can go back.

My question - is it possible to restart ddrescue with different set of the options (adding to original ones) to tell it to skip large area of disk but continue using the same image/log. So I can come back to non-tried areas later.

Thank you!

partitioning hard-drive data-recovery ddrescue

share|improve this question

asked Jul 15 at 17:04

Dave CollinsDave Collins

1

add a comment
 | 

0

I am doing a 1TB partition recovery from /dev/sdX3 to a file on a different disk. I am running booted from Live Ubuntu usb.

ddrescue was initially run with simple:
ddrescue --no-scrape /dev/sdc3 /target/sdc3.mg /target/sdc3.log

Eventually around 700GB it got to a place on disk where it gets a lot of sector errors. After 10-15 of those the disk goes offline and the usb host gets reset. The only way to get it back is to power down the disk, unplug USB and then power up and plug it back in. I am not making any progress on the remaining 300gb.

I wanted to skip 100gb or so to get the most from the disk. So I tried to specify "-i 800000000000". This allowed the recovery to work a bit but I noticed that journal/log file got completely wiped out and the image seems different now too (smaller).

Luckily I have saved prior image/log so I can go back.

My question - is it possible to restart ddrescue with different set of the options (adding to original ones) to tell it to skip large area of disk but continue using the same image/log. So I can come back to non-tried areas later.

Thank you!

partitioning hard-drive data-recovery ddrescue

share|improve this question

asked Jul 15 at 17:04

Dave CollinsDave Collins

1

add a comment
 | 

I am doing a 1TB partition recovery from /dev/sdX3 to a file on a different disk. I am running booted from Live Ubuntu usb.

ddrescue was initially run with simple:
ddrescue --no-scrape /dev/sdc3 /target/sdc3.mg /target/sdc3.log

Eventually around 700GB it got to a place on disk where it gets a lot of sector errors. After 10-15 of those the disk goes offline and the usb host gets reset. The only way to get it back is to power down the disk, unplug USB and then power up and plug it back in. I am not making any progress on the remaining 300gb.

I wanted to skip 100gb or so to get the most from the disk. So I tried to specify "-i 800000000000". This allowed the recovery to work a bit but I noticed that journal/log file got completely wiped out and the image seems different now too (smaller).

Luckily I have saved prior image/log so I can go back.

My question - is it possible to restart ddrescue with different set of the options (adding to original ones) to tell it to skip large area of disk but continue using the same image/log. So I can come back to non-tried areas later.

Thank you!

partitioning hard-drive data-recovery ddrescue

share|improve this question

asked Jul 15 at 17:04

Dave CollinsDave Collins

1

share|improve this question

asked Jul 15 at 17:04

Dave CollinsDave Collins

1

share|improve this question

asked Jul 15 at 17:04

Dave CollinsDave Collins

1

asked Jul 15 at 17:04

Dave CollinsDave Collins

1

asked Jul 15 at 17:04

Dave CollinsDave Collins

1