Migrating /home to ZFS [duplicate]
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This question already has an answer here:
How do I move /home/user to a zfs pool?
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I created a zpool, called zstorage, on two mirrored drives, on Ubuntu 18.04. The OS is installed on an SSD, with the /home directory on its own partition on that same SSD. I want to migrate /home to the ZFS pool. As you can see, the pool has been set up and ready - as far as I know. Where do I go from here?
Ordinarily, when moving /home to another drive, one can edit fstab, but ZFS doesn't use fstab. I'm rather stuck at knowing how to move my existing /home to /zstorage/home and how to mount /zstorage/home. The command
sudo zfs set mountpoint=/home zstorage/home
gives me the error
cannot mount '/home': directory is not empty.
property may be set but unable to remount filesystem
zfs
asked Oct 5 at 17:21
Kelley
19.2k21626
marked as duplicate by karel, muru, Eric Carvalho, Fabby, Charles Green yesterday
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
add a comment |
up vote
0
down vote
favorite
This question already has an answer here:
How do I move /home/user to a zfs pool?
3 answers
I created a zpool, called zstorage, on two mirrored drives, on Ubuntu 18.04. The OS is installed on an SSD, with the /home directory on its own partition on that same SSD. I want to migrate /home to the ZFS pool. As you can see, the pool has been set up and ready - as far as I know. Where do I go from here?
Ordinarily, when moving /home to another drive, one can edit fstab, but ZFS doesn't use fstab. I'm rather stuck at knowing how to move my existing /home to /zstorage/home and how to mount /zstorage/home. The command
sudo zfs set mountpoint=/home zstorage/home
gives me the error
cannot mount '/home': directory is not empty.
property may be set but unable to remount filesystem
zfs
asked Oct 5 at 17:21
Kelley
19.2k21626
marked as duplicate by karel, muru, Eric Carvalho, Fabby, Charles Green yesterday
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
Please don't use screenshots for terminal output. Instead paste the text into your question, select it with your mouse, and press the{}button in the editor to format it properly.
– Chai T. Rex
Oct 7 at 14:02
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
This question already has an answer here:
How do I move /home/user to a zfs pool?
3 answers
I created a zpool, called zstorage, on two mirrored drives, on Ubuntu 18.04. The OS is installed on an SSD, with the /home directory on its own partition on that same SSD. I want to migrate /home to the ZFS pool. As you can see, the pool has been set up and ready - as far as I know. Where do I go from here?
Ordinarily, when moving /home to another drive, one can edit fstab, but ZFS doesn't use fstab. I'm rather stuck at knowing how to move my existing /home to /zstorage/home and how to mount /zstorage/home. The command
sudo zfs set mountpoint=/home zstorage/home
gives me the error
cannot mount '/home': directory is not empty.
property may be set but unable to remount filesystem
zfs
asked Oct 5 at 17:21
Kelley
19.2k21626
This question already has an answer here:
How do I move /home/user to a zfs pool?
3 answers
I created a zpool, called zstorage, on two mirrored drives, on Ubuntu 18.04. The OS is installed on an SSD, with the /home directory on its own partition on that same SSD. I want to migrate /home to the ZFS pool. As you can see, the pool has been set up and ready - as far as I know. Where do I go from here?
Ordinarily, when moving /home to another drive, one can edit fstab, but ZFS doesn't use fstab. I'm rather stuck at knowing how to move my existing /home to /zstorage/home and how to mount /zstorage/home. The command
sudo zfs set mountpoint=/home zstorage/home
gives me the error
cannot mount '/home': directory is not empty.
property may be set but unable to remount filesystem
This question already has an answer here:
How do I move /home/user to a zfs pool?
3 answers
zfs
zfs
asked Oct 5 at 17:21
Kelley
19.2k21626
asked Oct 5 at 17:21
Kelley
19.2k21626
edited Oct 6 at 9:24
asked Oct 5 at 17:21
Kelley
19.2k21626
asked Oct 5 at 17:21
Kelley
19.2k21626
asked Oct 5 at 17:21
Kelley
19.2k21626
19.2k21626
marked as duplicate by karel, muru, Eric Carvalho, Fabby, Charles Green yesterday
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
marked as duplicate by karel, muru, Eric Carvalho, Fabby, Charles Green yesterday
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
Please don't use screenshots for terminal output. Instead paste the text into your question, select it with your mouse, and press the{}button in the editor to format it properly.
– Chai T. Rex
Oct 7 at 14:02
add a comment |
Please don't use screenshots for terminal output. Instead paste the text into your question, select it with your mouse, and press the{}button in the editor to format it properly.
– Chai T. Rex
Oct 7 at 14:02
Please don't use screenshots for terminal output. Instead paste the text into your question, select it with your mouse, and press the
{} button in the editor to format it properly.– Chai T. Rex
Oct 7 at 14:02
Please don't use screenshots for terminal output. Instead paste the text into your question, select it with your mouse, and press the
{} button in the editor to format it properly.– Chai T. Rex
Oct 7 at 14:02
add a comment |
1 Answer
1
active
oldest
votes
up vote
0
down vote
First you need to the zstorage/home filesystem to a different mountpoint like /zstorage/home to transfer the files from /home to /zstorage/home.
To transfer the data, best would be to do this while no user is logged in and you are logged in as root directly to not have any operations in the home directory. To copy the data, use either of the two commands as follows, whereas rsync is better if the copy process is interrupted and has to be rerun.
cp -a /home/* /zstorage/home/
rsync -axHAX --delete /home/ /zstorage/home/
After the copy process, you can mount the ZFS filesystem to /home, but as you already mentioned ZFS by default rejects mount points that contain something. You can alter that with the command as follows.
zfs set overlay=on zstorage
The property is normally inherited to child filesystems, but you can check it with zfs get overlay zstorage. Now you should be able to mount the ZFS filesystem on /home.
To do that, you may want to change the mount point in ZFS as follows.
zfs set mountpoint=/home zstorage/home
It also might be that /home is a separate mount point, in that case you need to remove, comment or alter the corresponding entry in /etc/fstab.
You also might want to keep the original data and overmount /home while testing your new setup and delete it later when everything is as expected. Just in case something goes wrong or you want to go back.
During boot, the ZFS filesystems should be mounted automatically without the need to configure /etc/fstab.
answered Oct 7 at 12:14
Thomas
3,45081427
You say that first I need to mount the filesystem to something like /zstorage/home, but that's exactly what I tried to do and it wouldn't let me. What am I missing?
– Kelley
Oct 8 at 19:50
1
From your df output, it is mounted top /zstorage/home.
– Thomas
Oct 9 at 4:07
Right! And that's what I thought, too, but then I got that error message: "cannot mount '/home': directory is not empty" and then "property may be set but unable to remount filesystem."
– Kelley
Oct 9 at 14:47
Just updated the answer and included the part to move the mountpoint to/homeafter the copy has been done.
– Thomas
Oct 9 at 14:59
Thanks for your help! I went ahead and made the attempt, but then was unable to login: it gets as far as having me click on my userid and enter my password, but doesn't accept it. I figure I'll need to wipe out my zpool and start over again. I must have made a mistake somewhere.
– Kelley
Oct 10 at 14:51
|
show 1 more comment
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
First you need to the zstorage/home filesystem to a different mountpoint like /zstorage/home to transfer the files from /home to /zstorage/home.
To transfer the data, best would be to do this while no user is logged in and you are logged in as root directly to not have any operations in the home directory. To copy the data, use either of the two commands as follows, whereas rsync is better if the copy process is interrupted and has to be rerun.
cp -a /home/* /zstorage/home/
rsync -axHAX --delete /home/ /zstorage/home/
After the copy process, you can mount the ZFS filesystem to /home, but as you already mentioned ZFS by default rejects mount points that contain something. You can alter that with the command as follows.
zfs set overlay=on zstorage
The property is normally inherited to child filesystems, but you can check it with zfs get overlay zstorage. Now you should be able to mount the ZFS filesystem on /home.
To do that, you may want to change the mount point in ZFS as follows.
zfs set mountpoint=/home zstorage/home
It also might be that /home is a separate mount point, in that case you need to remove, comment or alter the corresponding entry in /etc/fstab.
You also might want to keep the original data and overmount /home while testing your new setup and delete it later when everything is as expected. Just in case something goes wrong or you want to go back.
During boot, the ZFS filesystems should be mounted automatically without the need to configure /etc/fstab.
answered Oct 7 at 12:14
Thomas
3,45081427
You say that first I need to mount the filesystem to something like /zstorage/home, but that's exactly what I tried to do and it wouldn't let me. What am I missing?
– Kelley
Oct 8 at 19:50
1
From your df output, it is mounted top /zstorage/home.
– Thomas
Oct 9 at 4:07
Right! And that's what I thought, too, but then I got that error message: "cannot mount '/home': directory is not empty" and then "property may be set but unable to remount filesystem."
– Kelley
Oct 9 at 14:47
Just updated the answer and included the part to move the mountpoint to/homeafter the copy has been done.
– Thomas
Oct 9 at 14:59
Thanks for your help! I went ahead and made the attempt, but then was unable to login: it gets as far as having me click on my userid and enter my password, but doesn't accept it. I figure I'll need to wipe out my zpool and start over again. I must have made a mistake somewhere.
– Kelley
Oct 10 at 14:51
|
show 1 more comment
up vote
0
down vote
First you need to the zstorage/home filesystem to a different mountpoint like /zstorage/home to transfer the files from /home to /zstorage/home.
To transfer the data, best would be to do this while no user is logged in and you are logged in as root directly to not have any operations in the home directory. To copy the data, use either of the two commands as follows, whereas rsync is better if the copy process is interrupted and has to be rerun.
cp -a /home/* /zstorage/home/
rsync -axHAX --delete /home/ /zstorage/home/
After the copy process, you can mount the ZFS filesystem to /home, but as you already mentioned ZFS by default rejects mount points that contain something. You can alter that with the command as follows.
zfs set overlay=on zstorage
The property is normally inherited to child filesystems, but you can check it with zfs get overlay zstorage. Now you should be able to mount the ZFS filesystem on /home.
To do that, you may want to change the mount point in ZFS as follows.
zfs set mountpoint=/home zstorage/home
It also might be that /home is a separate mount point, in that case you need to remove, comment or alter the corresponding entry in /etc/fstab.
You also might want to keep the original data and overmount /home while testing your new setup and delete it later when everything is as expected. Just in case something goes wrong or you want to go back.
During boot, the ZFS filesystems should be mounted automatically without the need to configure /etc/fstab.
answered Oct 7 at 12:14
Thomas
3,45081427
You say that first I need to mount the filesystem to something like /zstorage/home, but that's exactly what I tried to do and it wouldn't let me. What am I missing?
– Kelley
Oct 8 at 19:50
1
From your df output, it is mounted top /zstorage/home.
– Thomas
Oct 9 at 4:07
Right! And that's what I thought, too, but then I got that error message: "cannot mount '/home': directory is not empty" and then "property may be set but unable to remount filesystem."
– Kelley
Oct 9 at 14:47
Just updated the answer and included the part to move the mountpoint to/homeafter the copy has been done.
– Thomas
Oct 9 at 14:59
Thanks for your help! I went ahead and made the attempt, but then was unable to login: it gets as far as having me click on my userid and enter my password, but doesn't accept it. I figure I'll need to wipe out my zpool and start over again. I must have made a mistake somewhere.
– Kelley
Oct 10 at 14:51
|
show 1 more comment
up vote
0
down vote
up vote
0
down vote
First you need to the zstorage/home filesystem to a different mountpoint like /zstorage/home to transfer the files from /home to /zstorage/home.
To transfer the data, best would be to do this while no user is logged in and you are logged in as root directly to not have any operations in the home directory. To copy the data, use either of the two commands as follows, whereas rsync is better if the copy process is interrupted and has to be rerun.
cp -a /home/* /zstorage/home/
rsync -axHAX --delete /home/ /zstorage/home/
After the copy process, you can mount the ZFS filesystem to /home, but as you already mentioned ZFS by default rejects mount points that contain something. You can alter that with the command as follows.
zfs set overlay=on zstorage
The property is normally inherited to child filesystems, but you can check it with zfs get overlay zstorage. Now you should be able to mount the ZFS filesystem on /home.
To do that, you may want to change the mount point in ZFS as follows.
zfs set mountpoint=/home zstorage/home
It also might be that /home is a separate mount point, in that case you need to remove, comment or alter the corresponding entry in /etc/fstab.
You also might want to keep the original data and overmount /home while testing your new setup and delete it later when everything is as expected. Just in case something goes wrong or you want to go back.
During boot, the ZFS filesystems should be mounted automatically without the need to configure /etc/fstab.
answered Oct 7 at 12:14
Thomas
3,45081427
First you need to the zstorage/home filesystem to a different mountpoint like /zstorage/home to transfer the files from /home to /zstorage/home.
To transfer the data, best would be to do this while no user is logged in and you are logged in as root directly to not have any operations in the home directory. To copy the data, use either of the two commands as follows, whereas rsync is better if the copy process is interrupted and has to be rerun.
cp -a /home/* /zstorage/home/
rsync -axHAX --delete /home/ /zstorage/home/
After the copy process, you can mount the ZFS filesystem to /home, but as you already mentioned ZFS by default rejects mount points that contain something. You can alter that with the command as follows.
zfs set overlay=on zstorage
The property is normally inherited to child filesystems, but you can check it with zfs get overlay zstorage. Now you should be able to mount the ZFS filesystem on /home.
To do that, you may want to change the mount point in ZFS as follows.
zfs set mountpoint=/home zstorage/home
It also might be that /home is a separate mount point, in that case you need to remove, comment or alter the corresponding entry in /etc/fstab.
You also might want to keep the original data and overmount /home while testing your new setup and delete it later when everything is as expected. Just in case something goes wrong or you want to go back.
During boot, the ZFS filesystems should be mounted automatically without the need to configure /etc/fstab.
answered Oct 7 at 12:14
Thomas
3,45081427
edited Oct 9 at 14:58
answered Oct 7 at 12:14
Thomas
3,45081427
answered Oct 7 at 12:14
Thomas
3,45081427
answered Oct 7 at 12:14
Thomas
3,45081427
3,45081427
You say that first I need to mount the filesystem to something like /zstorage/home, but that's exactly what I tried to do and it wouldn't let me. What am I missing?
– Kelley
Oct 8 at 19:50
1
From your df output, it is mounted top /zstorage/home.
– Thomas
Oct 9 at 4:07
Right! And that's what I thought, too, but then I got that error message: "cannot mount '/home': directory is not empty" and then "property may be set but unable to remount filesystem."
– Kelley
Oct 9 at 14:47
Just updated the answer and included the part to move the mountpoint to/homeafter the copy has been done.
– Thomas
Oct 9 at 14:59
Thanks for your help! I went ahead and made the attempt, but then was unable to login: it gets as far as having me click on my userid and enter my password, but doesn't accept it. I figure I'll need to wipe out my zpool and start over again. I must have made a mistake somewhere.
– Kelley
Oct 10 at 14:51
|
show 1 more comment
You say that first I need to mount the filesystem to something like /zstorage/home, but that's exactly what I tried to do and it wouldn't let me. What am I missing?
– Kelley
Oct 8 at 19:50
1
From your df output, it is mounted top /zstorage/home.
– Thomas
Oct 9 at 4:07
Right! And that's what I thought, too, but then I got that error message: "cannot mount '/home': directory is not empty" and then "property may be set but unable to remount filesystem."
– Kelley
Oct 9 at 14:47
Just updated the answer and included the part to move the mountpoint to/homeafter the copy has been done.
– Thomas
Oct 9 at 14:59
Thanks for your help! I went ahead and made the attempt, but then was unable to login: it gets as far as having me click on my userid and enter my password, but doesn't accept it. I figure I'll need to wipe out my zpool and start over again. I must have made a mistake somewhere.
– Kelley
Oct 10 at 14:51
You say that first I need to mount the filesystem to something like /zstorage/home, but that's exactly what I tried to do and it wouldn't let me. What am I missing?
– Kelley
Oct 8 at 19:50
You say that first I need to mount the filesystem to something like /zstorage/home, but that's exactly what I tried to do and it wouldn't let me. What am I missing?
– Kelley
Oct 8 at 19:50
1
1
From your df output, it is mounted top /zstorage/home.
– Thomas
Oct 9 at 4:07
From your df output, it is mounted top /zstorage/home.
– Thomas
Oct 9 at 4:07
Right! And that's what I thought, too, but then I got that error message: "cannot mount '/home': directory is not empty" and then "property may be set but unable to remount filesystem."
– Kelley
Oct 9 at 14:47
Right! And that's what I thought, too, but then I got that error message: "cannot mount '/home': directory is not empty" and then "property may be set but unable to remount filesystem."
– Kelley
Oct 9 at 14:47
Just updated the answer and included the part to move the mountpoint to
/home after the copy has been done.– Thomas
Oct 9 at 14:59
Just updated the answer and included the part to move the mountpoint to
/home after the copy has been done.– Thomas
Oct 9 at 14:59
Thanks for your help! I went ahead and made the attempt, but then was unable to login: it gets as far as having me click on my userid and enter my password, but doesn't accept it. I figure I'll need to wipe out my zpool and start over again. I must have made a mistake somewhere.
– Kelley
Oct 10 at 14:51
Thanks for your help! I went ahead and made the attempt, but then was unable to login: it gets as far as having me click on my userid and enter my password, but doesn't accept it. I figure I'll need to wipe out my zpool and start over again. I must have made a mistake somewhere.
– Kelley
Oct 10 at 14:51
|
show 1 more comment
Please don't use screenshots for terminal output. Instead paste the text into your question, select it with your mouse, and press the
{}button in the editor to format it properly.– Chai T. Rex
Oct 7 at 14:02