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mdadm.man add encouragement to shrink filesystem before shrinking array. 

Before resizing an array with --size or --array-size, then filesystem
should be resized.  mdadm cannot do this so the user should.

Reported-by: Gavin Flower <gavinflower@yahoo.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2011-02-15 12:40:21 +11:00
parent d4f9ad2de8
commit 66dedd88e6
1 changed files with 23 additions and 0 deletions
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mdadm.8.in
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@ -424,6 +424,18 @@ The size can be given as
.B max
which means to choose the largest size that fits on all current drives.
Before reducing the size of the array (with
.BR "\-\-grow \-\-size=" )
you should make sure that space isn't needed. If the device holds a
filesystem, you would need to resize the filesystem to use less space.
After reducing the array size you should check that the data stored in
the device is still available. If the device holds a filesystem, then
an 'fsck' of the filesystem is a minimum requirement. If there are
problems the array can be made bigger again with no loss with another
.B "\-\-grow \-\-size="
command.
This value can not be used with
.B CONTAINER
metadata such as DDF and IMSM.
@ -675,6 +687,17 @@ A value of
restores the apparent size of the array to be whatever the real
amount of available space is.
Before reducing the size of the array you should make sure that space
isn't needed. If the device holds a filesystem, you would need to
resize the filesystem to use less space.
After reducing the array size you should check that the data stored in
the device is still available. If the device holds a filesystem, then
an 'fsck' of the filesystem is a minimum requirement. If there are
problems the array can be made bigger again with no loss with another
.B "\-\-grow \-\-array\-size="
command.
.TP
.BR \-N ", " \-\-name=
Set a