dd-backup of corrupted disk
I used dd to create a imagefile of a partition of my external hdd. I used the 'conv=noerror,sync' option to skip readerrors and it did a full copy.
'sudo dd if=/dev/sdd of="/media/me/out/theimage.img" conv=noerror,sync'
Now I noticed that fsck returns some errors on the source-disk /dev/sdd. I had fsck repair the disk, which went well.
Now the question is: Should I make a new imagefile? Could it be that dd missed some data due to corrupted filesystem or some such?
Or can I use fsck to fix the imagefile just like it fixed the disk?
Right now if I run fsck on the image file, it screams at me that there are issues with the filesystem...
partitioning hard-drive dd fsck
asked Dec 18 at 22:08
bernd feinman
133
add a comment |
I used dd to create a imagefile of a partition of my external hdd. I used the 'conv=noerror,sync' option to skip readerrors and it did a full copy.
'sudo dd if=/dev/sdd of="/media/me/out/theimage.img" conv=noerror,sync'
Now I noticed that fsck returns some errors on the source-disk /dev/sdd. I had fsck repair the disk, which went well.
Now the question is: Should I make a new imagefile? Could it be that dd missed some data due to corrupted filesystem or some such?
Or can I use fsck to fix the imagefile just like it fixed the disk?
Right now if I run fsck on the image file, it screams at me that there are issues with the filesystem...
partitioning hard-drive dd fsck
asked Dec 18 at 22:08
bernd feinman
133
add a comment |
I used dd to create a imagefile of a partition of my external hdd. I used the 'conv=noerror,sync' option to skip readerrors and it did a full copy.
'sudo dd if=/dev/sdd of="/media/me/out/theimage.img" conv=noerror,sync'
Now I noticed that fsck returns some errors on the source-disk /dev/sdd. I had fsck repair the disk, which went well.
Now the question is: Should I make a new imagefile? Could it be that dd missed some data due to corrupted filesystem or some such?
Or can I use fsck to fix the imagefile just like it fixed the disk?
Right now if I run fsck on the image file, it screams at me that there are issues with the filesystem...
partitioning hard-drive dd fsck
asked Dec 18 at 22:08
bernd feinman
133
I used dd to create a imagefile of a partition of my external hdd. I used the 'conv=noerror,sync' option to skip readerrors and it did a full copy.
'sudo dd if=/dev/sdd of="/media/me/out/theimage.img" conv=noerror,sync'
Now I noticed that fsck returns some errors on the source-disk /dev/sdd. I had fsck repair the disk, which went well.
Now the question is: Should I make a new imagefile? Could it be that dd missed some data due to corrupted filesystem or some such?
Or can I use fsck to fix the imagefile just like it fixed the disk?
Right now if I run fsck on the image file, it screams at me that there are issues with the filesystem...
partitioning hard-drive dd fsck
partitioning hard-drive dd fsck
asked Dec 18 at 22:08
bernd feinman
133
asked Dec 18 at 22:08
bernd feinman
133
asked Dec 18 at 22:08
bernd feinman
133
asked Dec 18 at 22:08
bernd feinman
133
asked Dec 18 at 22:08
bernd feinman
133
133
add a comment |
add a comment |
1 Answer
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You can do either: fix the image file or make a new one.
However, I would use ddrescue instead of dd as it was designed to be able to read bad sectores / skip over them / ...:
sudo apt install gddrescue
ddrescue --retry-passes=3 /dev/sdd /media/me/out/theimage.img /media/me/out/theimage.log
For more info: man ddrescue
answered Dec 19 at 0:01
Fabby
26.4k1360159
Thanks. Ironically, ddrescue hangs on me... log: # current_pos current_status current_pass 0x6F3170000 ? 1 # pos size status 0x00000000 0x6F3180000 + 0x6F3180000 0xD4C6E80000 ?
– bernd feinman
Dec 19 at 1:16
Read all of the documentation: you have a bad sector and it doesn't hang: it's trying to continue...
– Fabby
Dec 19 at 1:16
1
How long can that take though? It's been stuck for at least 15 min. I'll let it run overnight.
– bernd feinman
Dec 19 at 1:22
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You can do either: fix the image file or make a new one.
However, I would use ddrescue instead of dd as it was designed to be able to read bad sectores / skip over them / ...:
sudo apt install gddrescue
ddrescue --retry-passes=3 /dev/sdd /media/me/out/theimage.img /media/me/out/theimage.log
For more info: man ddrescue
answered Dec 19 at 0:01
Fabby
26.4k1360159
Thanks. Ironically, ddrescue hangs on me... log: # current_pos current_status current_pass 0x6F3170000 ? 1 # pos size status 0x00000000 0x6F3180000 + 0x6F3180000 0xD4C6E80000 ?
– bernd feinman
Dec 19 at 1:16
Read all of the documentation: you have a bad sector and it doesn't hang: it's trying to continue...
– Fabby
Dec 19 at 1:16
1
How long can that take though? It's been stuck for at least 15 min. I'll let it run overnight.
– bernd feinman
Dec 19 at 1:22
add a comment |
You can do either: fix the image file or make a new one.
However, I would use ddrescue instead of dd as it was designed to be able to read bad sectores / skip over them / ...:
sudo apt install gddrescue
ddrescue --retry-passes=3 /dev/sdd /media/me/out/theimage.img /media/me/out/theimage.log
For more info: man ddrescue
answered Dec 19 at 0:01
Fabby
26.4k1360159
Thanks. Ironically, ddrescue hangs on me... log: # current_pos current_status current_pass 0x6F3170000 ? 1 # pos size status 0x00000000 0x6F3180000 + 0x6F3180000 0xD4C6E80000 ?
– bernd feinman
Dec 19 at 1:16
Read all of the documentation: you have a bad sector and it doesn't hang: it's trying to continue...
– Fabby
Dec 19 at 1:16
1
How long can that take though? It's been stuck for at least 15 min. I'll let it run overnight.
– bernd feinman
Dec 19 at 1:22
add a comment |
You can do either: fix the image file or make a new one.
However, I would use ddrescue instead of dd as it was designed to be able to read bad sectores / skip over them / ...:
sudo apt install gddrescue
ddrescue --retry-passes=3 /dev/sdd /media/me/out/theimage.img /media/me/out/theimage.log
For more info: man ddrescue
answered Dec 19 at 0:01
Fabby
26.4k1360159
You can do either: fix the image file or make a new one.
However, I would use ddrescue instead of dd as it was designed to be able to read bad sectores / skip over them / ...:
sudo apt install gddrescue
ddrescue --retry-passes=3 /dev/sdd /media/me/out/theimage.img /media/me/out/theimage.log
For more info: man ddrescue
answered Dec 19 at 0:01
Fabby
26.4k1360159
answered Dec 19 at 0:01
Fabby
26.4k1360159
answered Dec 19 at 0:01
Fabby
26.4k1360159
answered Dec 19 at 0:01
Fabby
26.4k1360159
26.4k1360159
Thanks. Ironically, ddrescue hangs on me... log: # current_pos current_status current_pass 0x6F3170000 ? 1 # pos size status 0x00000000 0x6F3180000 + 0x6F3180000 0xD4C6E80000 ?
– bernd feinman
Dec 19 at 1:16
Read all of the documentation: you have a bad sector and it doesn't hang: it's trying to continue...
– Fabby
Dec 19 at 1:16
1
How long can that take though? It's been stuck for at least 15 min. I'll let it run overnight.
– bernd feinman
Dec 19 at 1:22
add a comment |
Thanks. Ironically, ddrescue hangs on me... log: # current_pos current_status current_pass 0x6F3170000 ? 1 # pos size status 0x00000000 0x6F3180000 + 0x6F3180000 0xD4C6E80000 ?
– bernd feinman
Dec 19 at 1:16
Read all of the documentation: you have a bad sector and it doesn't hang: it's trying to continue...
– Fabby
Dec 19 at 1:16
1
How long can that take though? It's been stuck for at least 15 min. I'll let it run overnight.
– bernd feinman
Dec 19 at 1:22
Thanks. Ironically, ddrescue hangs on me... log: # current_pos current_status current_pass 0x6F3170000 ? 1 # pos size status 0x00000000 0x6F3180000 + 0x6F3180000 0xD4C6E80000 ?
– bernd feinman
Dec 19 at 1:16
Thanks. Ironically, ddrescue hangs on me... log: # current_pos current_status current_pass 0x6F3170000 ? 1 # pos size status 0x00000000 0x6F3180000 + 0x6F3180000 0xD4C6E80000 ?
– bernd feinman
Dec 19 at 1:16
Read all of the documentation: you have a bad sector and it doesn't hang: it's trying to continue...
– Fabby
Dec 19 at 1:16
Read all of the documentation: you have a bad sector and it doesn't hang: it's trying to continue...
– Fabby
Dec 19 at 1:16
1
1
How long can that take though? It's been stuck for at least 15 min. I'll let it run overnight.
– bernd feinman
Dec 19 at 1:22
How long can that take though? It's been stuck for at least 15 min. I'll let it run overnight.
– bernd feinman
Dec 19 at 1:22
add a comment |
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