Can I redirect block storage devices to each other?
Obviously what I'm about to describe is better handled by rsync or cp, but...
Say I have two drives on my computer. Could I make one a perfect image of the other with the following command? Would files on sda be accessible on sdb through the file system?
cat /dev/sda > /dev/sdb
My inclination is that each device could (potentially) be too different from the other for a blind write like this to work.
block-device storage
asked Dec 17 at 16:49
DeepDeadpool
275211
add a comment |
Obviously what I'm about to describe is better handled by rsync or cp, but...
Say I have two drives on my computer. Could I make one a perfect image of the other with the following command? Would files on sda be accessible on sdb through the file system?
cat /dev/sda > /dev/sdb
My inclination is that each device could (potentially) be too different from the other for a blind write like this to work.
block-device storage
asked Dec 17 at 16:49
DeepDeadpool
275211
add a comment |
Obviously what I'm about to describe is better handled by rsync or cp, but...
Say I have two drives on my computer. Could I make one a perfect image of the other with the following command? Would files on sda be accessible on sdb through the file system?
cat /dev/sda > /dev/sdb
My inclination is that each device could (potentially) be too different from the other for a blind write like this to work.
block-device storage
asked Dec 17 at 16:49
DeepDeadpool
275211
Obviously what I'm about to describe is better handled by rsync or cp, but...
Say I have two drives on my computer. Could I make one a perfect image of the other with the following command? Would files on sda be accessible on sdb through the file system?
cat /dev/sda > /dev/sdb
My inclination is that each device could (potentially) be too different from the other for a blind write like this to work.
block-device storage
block-device storage
asked Dec 17 at 16:49
DeepDeadpool
275211
asked Dec 17 at 16:49
DeepDeadpool
275211
asked Dec 17 at 16:49
DeepDeadpool
275211
asked Dec 17 at 16:49
DeepDeadpool
275211
asked Dec 17 at 16:49
DeepDeadpool
275211
275211
add a comment |
add a comment |
1 Answer
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Much better way to copy disk to disk is to use dd:
dd if=/dev/sda of=/dev/sdb
But this will work well only if sda is smaller or equivalent by size to sdb. The same is true about the files on sdb.
If you want to have files on smaller sdb use rsync with some filter (to be sure you will sync successfully the files from sda to sdb)
answered Dec 17 at 17:35
Romeo Ninov
5,20231827
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Much better way to copy disk to disk is to use dd:
dd if=/dev/sda of=/dev/sdb
But this will work well only if sda is smaller or equivalent by size to sdb. The same is true about the files on sdb.
If you want to have files on smaller sdb use rsync with some filter (to be sure you will sync successfully the files from sda to sdb)
answered Dec 17 at 17:35
Romeo Ninov
5,20231827
add a comment |
Much better way to copy disk to disk is to use dd:
dd if=/dev/sda of=/dev/sdb
But this will work well only if sda is smaller or equivalent by size to sdb. The same is true about the files on sdb.
If you want to have files on smaller sdb use rsync with some filter (to be sure you will sync successfully the files from sda to sdb)
answered Dec 17 at 17:35
Romeo Ninov
5,20231827
add a comment |
Much better way to copy disk to disk is to use dd:
dd if=/dev/sda of=/dev/sdb
But this will work well only if sda is smaller or equivalent by size to sdb. The same is true about the files on sdb.
If you want to have files on smaller sdb use rsync with some filter (to be sure you will sync successfully the files from sda to sdb)
answered Dec 17 at 17:35
Romeo Ninov
5,20231827
Much better way to copy disk to disk is to use dd:
dd if=/dev/sda of=/dev/sdb
But this will work well only if sda is smaller or equivalent by size to sdb. The same is true about the files on sdb.
If you want to have files on smaller sdb use rsync with some filter (to be sure you will sync successfully the files from sda to sdb)
answered Dec 17 at 17:35
Romeo Ninov
5,20231827
answered Dec 17 at 17:35
Romeo Ninov
5,20231827
answered Dec 17 at 17:35
Romeo Ninov
5,20231827
answered Dec 17 at 17:35
Romeo Ninov
5,20231827
5,20231827
add a comment |
add a comment |
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