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how can I sync 2 almost identical disk after dd
How to set up disk cloning with dd, netcat and ssh tunnel?Mount new partition on a removable disk after dd?After using dd new disk cannot be booted and partition tables lostClone Flash Drive in Linux using DDhow to boot from a backup disk created by ddrsync, dd and then add to RAID 1, could cause database corrupted?On a system with 64GB mem the Linux Buffer run full while copying with dd to dev null and io stops till manual drop_cachesLinux page cache slows down IO on dual cpu server with 64GB ramHow can I resume a dd operation after a “error writing in file” status?Copy LVM volume group spanning two physical volumes on two disks
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Lets say I have /dev/sda and /dev/sdb.
Before, I run dd if=/dev/sda of=/dev/sdb bs=128M, and it succeeded.
Then after some time, there is update on first disk, and I want to clone it to second disk. But I don't want to run dd from beginning, because ... well it takes time.
Any solution to update on the /dev/sdb without dd'ing from start?
UPDATE : the disk actually is ntfs, so rsync is not a solution. Also, I want the second disk to be bootable like the source disk, using rsync would break so many things.
dd
asked May 28 at 6:30
Rinaldo JonathanRinaldo Jonathan
114
add a comment |
Lets say I have /dev/sda and /dev/sdb.
Before, I run dd if=/dev/sda of=/dev/sdb bs=128M, and it succeeded.
Then after some time, there is update on first disk, and I want to clone it to second disk. But I don't want to run dd from beginning, because ... well it takes time.
Any solution to update on the /dev/sdb without dd'ing from start?
UPDATE : the disk actually is ntfs, so rsync is not a solution. Also, I want the second disk to be bootable like the source disk, using rsync would break so many things.
dd
asked May 28 at 6:30
Rinaldo JonathanRinaldo Jonathan
114
How can you know which blocks are updated? What is the reason for this?
– Michael Hampton♦
May 28 at 6:45
@MichaelHampton I'm trying to clone server to server over ssh, but I don't want to shutdown the old server just for dd'ing 1TB data over 100mbps connection.
– Rinaldo Jonathan
May 28 at 6:46
add a comment |
Lets say I have /dev/sda and /dev/sdb.
Before, I run dd if=/dev/sda of=/dev/sdb bs=128M, and it succeeded.
Then after some time, there is update on first disk, and I want to clone it to second disk. But I don't want to run dd from beginning, because ... well it takes time.
Any solution to update on the /dev/sdb without dd'ing from start?
UPDATE : the disk actually is ntfs, so rsync is not a solution. Also, I want the second disk to be bootable like the source disk, using rsync would break so many things.
dd
asked May 28 at 6:30
Rinaldo JonathanRinaldo Jonathan
114
Lets say I have /dev/sda and /dev/sdb.
Before, I run dd if=/dev/sda of=/dev/sdb bs=128M, and it succeeded.
Then after some time, there is update on first disk, and I want to clone it to second disk. But I don't want to run dd from beginning, because ... well it takes time.
Any solution to update on the /dev/sdb without dd'ing from start?
UPDATE : the disk actually is ntfs, so rsync is not a solution. Also, I want the second disk to be bootable like the source disk, using rsync would break so many things.
dd
dd
asked May 28 at 6:30
Rinaldo JonathanRinaldo Jonathan
114
asked May 28 at 6:30
Rinaldo JonathanRinaldo Jonathan
114
edited May 28 at 6:54
Rinaldo Jonathan
asked May 28 at 6:30
Rinaldo JonathanRinaldo Jonathan
114
asked May 28 at 6:30
Rinaldo JonathanRinaldo Jonathan
114
asked May 28 at 6:30
Rinaldo JonathanRinaldo Jonathan
114
114
How can you know which blocks are updated? What is the reason for this?
– Michael Hampton♦
May 28 at 6:45
@MichaelHampton I'm trying to clone server to server over ssh, but I don't want to shutdown the old server just for dd'ing 1TB data over 100mbps connection.
– Rinaldo Jonathan
May 28 at 6:46
add a comment |
How can you know which blocks are updated? What is the reason for this?
– Michael Hampton♦
May 28 at 6:45
@MichaelHampton I'm trying to clone server to server over ssh, but I don't want to shutdown the old server just for dd'ing 1TB data over 100mbps connection.
– Rinaldo Jonathan
May 28 at 6:46
How can you know which blocks are updated? What is the reason for this?
– Michael Hampton♦
May 28 at 6:45
How can you know which blocks are updated? What is the reason for this?
– Michael Hampton♦
May 28 at 6:45
@MichaelHampton I'm trying to clone server to server over ssh, but I don't want to shutdown the old server just for dd'ing 1TB data over 100mbps connection.
– Rinaldo Jonathan
May 28 at 6:46
@MichaelHampton I'm trying to clone server to server over ssh, but I don't want to shutdown the old server just for dd'ing 1TB data over 100mbps connection.
– Rinaldo Jonathan
May 28 at 6:46
add a comment |
2 Answers
2
active
oldest
votes
You can try using blocksync, bdsync or even rsync --inplace --copy-device (if your rsync version supports it) to achieve what you ask.
Be aware that all these methods will read the entire source and destination drives, but they will transfer only changed blocks.
answered May 28 at 7:00
shodanshokshodanshok
27.9k35194
I never know that there is rsync with --copy-device. Thanks!
– Rinaldo Jonathan
May 28 at 7:01
I was thinking of a more complex solution. Good thing this works.
– Overmind
May 28 at 7:11
add a comment |
I bet RSync will do the job perfectly. Actually, you could also have used it to clone your disks at first instead of using dd.
answered May 28 at 6:46
HttqmHttqm
1557
the disk is ntfs. but I want solution to be as general as possible. and I want the destination disk to be bootable like the source disk, and using rsync would make different uuid, broken bootloader and things like that.
– Rinaldo Jonathan
May 28 at 6:47
@RinaldoJonathan Got it ;-) You should have said this (and other details you gave in other comments) while asking your question. Can you, please, update your initial question with these constraints ?
– Httqm
May 28 at 6:50
okay, will do. /15char
– Rinaldo Jonathan
May 28 at 6:51
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
You can try using blocksync, bdsync or even rsync --inplace --copy-device (if your rsync version supports it) to achieve what you ask.
Be aware that all these methods will read the entire source and destination drives, but they will transfer only changed blocks.
answered May 28 at 7:00
shodanshokshodanshok
27.9k35194
I never know that there is rsync with --copy-device. Thanks!
– Rinaldo Jonathan
May 28 at 7:01
I was thinking of a more complex solution. Good thing this works.
– Overmind
May 28 at 7:11
add a comment |
You can try using blocksync, bdsync or even rsync --inplace --copy-device (if your rsync version supports it) to achieve what you ask.
Be aware that all these methods will read the entire source and destination drives, but they will transfer only changed blocks.
answered May 28 at 7:00
shodanshokshodanshok
27.9k35194
I never know that there is rsync with --copy-device. Thanks!
– Rinaldo Jonathan
May 28 at 7:01
I was thinking of a more complex solution. Good thing this works.
– Overmind
May 28 at 7:11
add a comment |
You can try using blocksync, bdsync or even rsync --inplace --copy-device (if your rsync version supports it) to achieve what you ask.
Be aware that all these methods will read the entire source and destination drives, but they will transfer only changed blocks.
answered May 28 at 7:00
shodanshokshodanshok
27.9k35194
You can try using blocksync, bdsync or even rsync --inplace --copy-device (if your rsync version supports it) to achieve what you ask.
Be aware that all these methods will read the entire source and destination drives, but they will transfer only changed blocks.
answered May 28 at 7:00
shodanshokshodanshok
27.9k35194
answered May 28 at 7:00
shodanshokshodanshok
27.9k35194
answered May 28 at 7:00
shodanshokshodanshok
27.9k35194
answered May 28 at 7:00
shodanshokshodanshok
27.9k35194
27.9k35194
I never know that there is rsync with --copy-device. Thanks!
– Rinaldo Jonathan
May 28 at 7:01
I was thinking of a more complex solution. Good thing this works.
– Overmind
May 28 at 7:11
add a comment |
I never know that there is rsync with --copy-device. Thanks!
– Rinaldo Jonathan
May 28 at 7:01
I was thinking of a more complex solution. Good thing this works.
– Overmind
May 28 at 7:11
I never know that there is rsync with --copy-device. Thanks!
– Rinaldo Jonathan
May 28 at 7:01
I never know that there is rsync with --copy-device. Thanks!
– Rinaldo Jonathan
May 28 at 7:01
I was thinking of a more complex solution. Good thing this works.
– Overmind
May 28 at 7:11
I was thinking of a more complex solution. Good thing this works.
– Overmind
May 28 at 7:11
add a comment |
I bet RSync will do the job perfectly. Actually, you could also have used it to clone your disks at first instead of using dd.
answered May 28 at 6:46
HttqmHttqm
1557
the disk is ntfs. but I want solution to be as general as possible. and I want the destination disk to be bootable like the source disk, and using rsync would make different uuid, broken bootloader and things like that.
– Rinaldo Jonathan
May 28 at 6:47
@RinaldoJonathan Got it ;-) You should have said this (and other details you gave in other comments) while asking your question. Can you, please, update your initial question with these constraints ?
– Httqm
May 28 at 6:50
okay, will do. /15char
– Rinaldo Jonathan
May 28 at 6:51
add a comment |
I bet RSync will do the job perfectly. Actually, you could also have used it to clone your disks at first instead of using dd.
answered May 28 at 6:46
HttqmHttqm
1557
the disk is ntfs. but I want solution to be as general as possible. and I want the destination disk to be bootable like the source disk, and using rsync would make different uuid, broken bootloader and things like that.
– Rinaldo Jonathan
May 28 at 6:47
@RinaldoJonathan Got it ;-) You should have said this (and other details you gave in other comments) while asking your question. Can you, please, update your initial question with these constraints ?
– Httqm
May 28 at 6:50
okay, will do. /15char
– Rinaldo Jonathan
May 28 at 6:51
add a comment |
I bet RSync will do the job perfectly. Actually, you could also have used it to clone your disks at first instead of using dd.
answered May 28 at 6:46
HttqmHttqm
1557
I bet RSync will do the job perfectly. Actually, you could also have used it to clone your disks at first instead of using dd.
answered May 28 at 6:46
HttqmHttqm
1557
answered May 28 at 6:46
HttqmHttqm
1557
answered May 28 at 6:46
HttqmHttqm
1557
answered May 28 at 6:46
HttqmHttqm
1557
1557
the disk is ntfs. but I want solution to be as general as possible. and I want the destination disk to be bootable like the source disk, and using rsync would make different uuid, broken bootloader and things like that.
– Rinaldo Jonathan
May 28 at 6:47
@RinaldoJonathan Got it ;-) You should have said this (and other details you gave in other comments) while asking your question. Can you, please, update your initial question with these constraints ?
– Httqm
May 28 at 6:50
okay, will do. /15char
– Rinaldo Jonathan
May 28 at 6:51
add a comment |
the disk is ntfs. but I want solution to be as general as possible. and I want the destination disk to be bootable like the source disk, and using rsync would make different uuid, broken bootloader and things like that.
– Rinaldo Jonathan
May 28 at 6:47
@RinaldoJonathan Got it ;-) You should have said this (and other details you gave in other comments) while asking your question. Can you, please, update your initial question with these constraints ?
– Httqm
May 28 at 6:50
okay, will do. /15char
– Rinaldo Jonathan
May 28 at 6:51
the disk is ntfs. but I want solution to be as general as possible. and I want the destination disk to be bootable like the source disk, and using rsync would make different uuid, broken bootloader and things like that.
– Rinaldo Jonathan
May 28 at 6:47
the disk is ntfs. but I want solution to be as general as possible. and I want the destination disk to be bootable like the source disk, and using rsync would make different uuid, broken bootloader and things like that.
– Rinaldo Jonathan
May 28 at 6:47
@RinaldoJonathan Got it ;-) You should have said this (and other details you gave in other comments) while asking your question. Can you, please, update your initial question with these constraints ?
– Httqm
May 28 at 6:50
@RinaldoJonathan Got it ;-) You should have said this (and other details you gave in other comments) while asking your question. Can you, please, update your initial question with these constraints ?
– Httqm
May 28 at 6:50
okay, will do. /15char
– Rinaldo Jonathan
May 28 at 6:51
okay, will do. /15char
– Rinaldo Jonathan
May 28 at 6:51
add a comment |
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How can you know which blocks are updated? What is the reason for this?
– Michael Hampton♦
May 28 at 6:45
@MichaelHampton I'm trying to clone server to server over ssh, but I don't want to shutdown the old server just for dd'ing 1TB data over 100mbps connection.
– Rinaldo Jonathan
May 28 at 6:46