Does order of mount operations matter when mounting into an existing mountpoint?
The question Best practice when mounting a new disk within an existing mount?
inspired me to ask this follow-up question:
The other question asked whether it is ok to
mount /dev/sdb1 /home
mount /dev/sdb2 /home/mythtv
so that /home/mythtv is a mountpoint within the mountpoint
/home. (spoiler: Yes, it is perfectly ok.).
What if I'd change the order of commands to
mount /dev/sdb2 /home/mythtv
mount /dev/sdb1 /home
Will that yield the same result or will /home/mythtv be hidden by /home?
I assume /home contains an (empty) directory /home/mythtv.
mount
asked 1 hour ago
PerlDuck
5,40411231
add a comment |
The question Best practice when mounting a new disk within an existing mount?
inspired me to ask this follow-up question:
The other question asked whether it is ok to
mount /dev/sdb1 /home
mount /dev/sdb2 /home/mythtv
so that /home/mythtv is a mountpoint within the mountpoint
/home. (spoiler: Yes, it is perfectly ok.).
What if I'd change the order of commands to
mount /dev/sdb2 /home/mythtv
mount /dev/sdb1 /home
Will that yield the same result or will /home/mythtv be hidden by /home?
I assume /home contains an (empty) directory /home/mythtv.
mount
asked 1 hour ago
PerlDuck
5,40411231
add a comment |
The question Best practice when mounting a new disk within an existing mount?
inspired me to ask this follow-up question:
The other question asked whether it is ok to
mount /dev/sdb1 /home
mount /dev/sdb2 /home/mythtv
so that /home/mythtv is a mountpoint within the mountpoint
/home. (spoiler: Yes, it is perfectly ok.).
What if I'd change the order of commands to
mount /dev/sdb2 /home/mythtv
mount /dev/sdb1 /home
Will that yield the same result or will /home/mythtv be hidden by /home?
I assume /home contains an (empty) directory /home/mythtv.
mount
asked 1 hour ago
PerlDuck
5,40411231
The question Best practice when mounting a new disk within an existing mount?
inspired me to ask this follow-up question:
The other question asked whether it is ok to
mount /dev/sdb1 /home
mount /dev/sdb2 /home/mythtv
so that /home/mythtv is a mountpoint within the mountpoint
/home. (spoiler: Yes, it is perfectly ok.).
What if I'd change the order of commands to
mount /dev/sdb2 /home/mythtv
mount /dev/sdb1 /home
Will that yield the same result or will /home/mythtv be hidden by /home?
I assume /home contains an (empty) directory /home/mythtv.
mount
mount
asked 1 hour ago
PerlDuck
5,40411231
asked 1 hour ago
PerlDuck
5,40411231
asked 1 hour ago
PerlDuck
5,40411231
asked 1 hour ago
PerlDuck
5,40411231
asked 1 hour ago
PerlDuck
5,40411231
5,40411231
add a comment |
add a comment |
1 Answer
1
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oldest
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Yes, it metters! Your first example:
mount /dev/sdb1 /home
mount /dev/sdb2 /home/mythtv
is the only right way, when mounting you must respect the tree order.
In your second examples
mount /dev/sdb2 /home/mythtv
mount /dev/sdb1 /home
If we assuming /home/mythtv exists on the filesystem is gonna mount it with no problem, but after you mount the second volume you cannot access anymore to the first one, this because you let system mount sdb2 on the path existing in to /home/mythtv when you mount the /home/ you are telling you system to mount it in the /home which also exist but is going to "cover" existing mount point, they are both mounted, but when you type cd /home/mythtv bash take you to sdb1:/mythtv instead sdb2:/home/mythtv because they are different path.
I hope to explain good. If not clear pleas ask in the comment, I'll try to get it to you more clear.
Update
as per @mook765 says, the order is important also in the fstab files:
fstab file when mount is read up to down, and when umount down to up, in other case if you try to umount /home before /home/mythtv mount will say to you the /home resource is busy, because have the /home/mythtv mounted and cannot handle it.
answered 1 hour ago
AtomiX84
2507
Yes, that sounds reasonable. Thank you.
– PerlDuck
1 hour ago
2
@PerlDuck This is also important for/etc/fstab, line order matters.
– mook765
58 mins ago
1
Yes Absolutely, @mook765 say the true, fstab file when mount is read up to down, and when umount down to up, in other case if you try to umount /home before /home/mythtv mount will say to you the /home resource is busy, because have the /home/mythtv mounted and cannot handle it.
– AtomiX84
49 mins ago
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
Yes, it metters! Your first example:
mount /dev/sdb1 /home
mount /dev/sdb2 /home/mythtv
is the only right way, when mounting you must respect the tree order.
In your second examples
mount /dev/sdb2 /home/mythtv
mount /dev/sdb1 /home
If we assuming /home/mythtv exists on the filesystem is gonna mount it with no problem, but after you mount the second volume you cannot access anymore to the first one, this because you let system mount sdb2 on the path existing in to /home/mythtv when you mount the /home/ you are telling you system to mount it in the /home which also exist but is going to "cover" existing mount point, they are both mounted, but when you type cd /home/mythtv bash take you to sdb1:/mythtv instead sdb2:/home/mythtv because they are different path.
I hope to explain good. If not clear pleas ask in the comment, I'll try to get it to you more clear.
Update
as per @mook765 says, the order is important also in the fstab files:
fstab file when mount is read up to down, and when umount down to up, in other case if you try to umount /home before /home/mythtv mount will say to you the /home resource is busy, because have the /home/mythtv mounted and cannot handle it.
answered 1 hour ago
AtomiX84
2507
Yes, that sounds reasonable. Thank you.
– PerlDuck
1 hour ago
2
@PerlDuck This is also important for/etc/fstab, line order matters.
– mook765
58 mins ago
1
Yes Absolutely, @mook765 say the true, fstab file when mount is read up to down, and when umount down to up, in other case if you try to umount /home before /home/mythtv mount will say to you the /home resource is busy, because have the /home/mythtv mounted and cannot handle it.
– AtomiX84
49 mins ago
add a comment |
Yes, it metters! Your first example:
mount /dev/sdb1 /home
mount /dev/sdb2 /home/mythtv
is the only right way, when mounting you must respect the tree order.
In your second examples
mount /dev/sdb2 /home/mythtv
mount /dev/sdb1 /home
If we assuming /home/mythtv exists on the filesystem is gonna mount it with no problem, but after you mount the second volume you cannot access anymore to the first one, this because you let system mount sdb2 on the path existing in to /home/mythtv when you mount the /home/ you are telling you system to mount it in the /home which also exist but is going to "cover" existing mount point, they are both mounted, but when you type cd /home/mythtv bash take you to sdb1:/mythtv instead sdb2:/home/mythtv because they are different path.
I hope to explain good. If not clear pleas ask in the comment, I'll try to get it to you more clear.
Update
as per @mook765 says, the order is important also in the fstab files:
fstab file when mount is read up to down, and when umount down to up, in other case if you try to umount /home before /home/mythtv mount will say to you the /home resource is busy, because have the /home/mythtv mounted and cannot handle it.
answered 1 hour ago
AtomiX84
2507
Yes, that sounds reasonable. Thank you.
– PerlDuck
1 hour ago
2
@PerlDuck This is also important for/etc/fstab, line order matters.
– mook765
58 mins ago
1
Yes Absolutely, @mook765 say the true, fstab file when mount is read up to down, and when umount down to up, in other case if you try to umount /home before /home/mythtv mount will say to you the /home resource is busy, because have the /home/mythtv mounted and cannot handle it.
– AtomiX84
49 mins ago
add a comment |
Yes, it metters! Your first example:
mount /dev/sdb1 /home
mount /dev/sdb2 /home/mythtv
is the only right way, when mounting you must respect the tree order.
In your second examples
mount /dev/sdb2 /home/mythtv
mount /dev/sdb1 /home
If we assuming /home/mythtv exists on the filesystem is gonna mount it with no problem, but after you mount the second volume you cannot access anymore to the first one, this because you let system mount sdb2 on the path existing in to /home/mythtv when you mount the /home/ you are telling you system to mount it in the /home which also exist but is going to "cover" existing mount point, they are both mounted, but when you type cd /home/mythtv bash take you to sdb1:/mythtv instead sdb2:/home/mythtv because they are different path.
I hope to explain good. If not clear pleas ask in the comment, I'll try to get it to you more clear.
Update
as per @mook765 says, the order is important also in the fstab files:
fstab file when mount is read up to down, and when umount down to up, in other case if you try to umount /home before /home/mythtv mount will say to you the /home resource is busy, because have the /home/mythtv mounted and cannot handle it.
answered 1 hour ago
AtomiX84
2507
Yes, it metters! Your first example:
mount /dev/sdb1 /home
mount /dev/sdb2 /home/mythtv
is the only right way, when mounting you must respect the tree order.
In your second examples
mount /dev/sdb2 /home/mythtv
mount /dev/sdb1 /home
If we assuming /home/mythtv exists on the filesystem is gonna mount it with no problem, but after you mount the second volume you cannot access anymore to the first one, this because you let system mount sdb2 on the path existing in to /home/mythtv when you mount the /home/ you are telling you system to mount it in the /home which also exist but is going to "cover" existing mount point, they are both mounted, but when you type cd /home/mythtv bash take you to sdb1:/mythtv instead sdb2:/home/mythtv because they are different path.
I hope to explain good. If not clear pleas ask in the comment, I'll try to get it to you more clear.
Update
as per @mook765 says, the order is important also in the fstab files:
fstab file when mount is read up to down, and when umount down to up, in other case if you try to umount /home before /home/mythtv mount will say to you the /home resource is busy, because have the /home/mythtv mounted and cannot handle it.
answered 1 hour ago
AtomiX84
2507
edited 44 mins ago
answered 1 hour ago
AtomiX84
2507
answered 1 hour ago
AtomiX84
2507
answered 1 hour ago
AtomiX84
2507
2507
Yes, that sounds reasonable. Thank you.
– PerlDuck
1 hour ago
2
@PerlDuck This is also important for/etc/fstab, line order matters.
– mook765
58 mins ago
1
Yes Absolutely, @mook765 say the true, fstab file when mount is read up to down, and when umount down to up, in other case if you try to umount /home before /home/mythtv mount will say to you the /home resource is busy, because have the /home/mythtv mounted and cannot handle it.
– AtomiX84
49 mins ago
add a comment |
Yes, that sounds reasonable. Thank you.
– PerlDuck
1 hour ago
2
@PerlDuck This is also important for/etc/fstab, line order matters.
– mook765
58 mins ago
1
Yes Absolutely, @mook765 say the true, fstab file when mount is read up to down, and when umount down to up, in other case if you try to umount /home before /home/mythtv mount will say to you the /home resource is busy, because have the /home/mythtv mounted and cannot handle it.
– AtomiX84
49 mins ago
Yes, that sounds reasonable. Thank you.
– PerlDuck
1 hour ago
Yes, that sounds reasonable. Thank you.
– PerlDuck
1 hour ago
2
2
@PerlDuck This is also important for
/etc/fstab, line order matters.– mook765
58 mins ago
@PerlDuck This is also important for
/etc/fstab, line order matters.– mook765
58 mins ago
1
1
Yes Absolutely, @mook765 say the true, fstab file when mount is read up to down, and when umount down to up, in other case if you try to umount /home before /home/mythtv mount will say to you the /home resource is busy, because have the /home/mythtv mounted and cannot handle it.
– AtomiX84
49 mins ago
Yes Absolutely, @mook765 say the true, fstab file when mount is read up to down, and when umount down to up, in other case if you try to umount /home before /home/mythtv mount will say to you the /home resource is busy, because have the /home/mythtv mounted and cannot handle it.
– AtomiX84
49 mins ago
add a comment |
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