from man resize2fs
If you wish to shrink an ext2 partition, first use resize2fs to
shrink the size of filesystem. Then you may use fdisk(8) to shrink the
size of the partition. When
shrinking the size of the partition, make sure you do not make it
smaller than the new size of the ext2 filesystem!
i think the correct steps are:
resize2fs /dev/mapper/localhost-home -2G
lvresize --size -2G /dev/mapper/localhost-home
2014-06-01 22:00 GMT+02:00 Miroslav Skoric <sko...@eunet.rs>:
> Hi,
>
> I have encrypted LVM on one of my Wheezy machines, and recently noticed
> that /tmp space was too low for one application (In fact it was about 350
> MB and I wanted it to be around 2.5 GB). So I tried to make /tmp space
> bigger while I was mounted and online, but vgdisplay reported no free space
> for that action (something like that):
>
> sys@localhost:~$ sudo vgdisplay
> --- Volume group ---
> VG Name localhost
> System ID
> Format lvm2
> Metadata Areas 1
> Metadata Sequence No 9
> VG Access read/write
> VG Status resizable
> MAX LV 0
> Cur LV 6
> Open LV 6
> Max PV 0
> Cur PV 1
> Act PV 1
> VG Size 297.85 GiB
> PE Size 4.00 MiB
> Total PE 76249
> Alloc PE / Size 76249 / 297.85 GiB
> Free PE / Size 0 / 0
> VG UUID fbCaw1-u3SN-2HCy-
>
> Then I decided to shrink /home for some 2 gig and to add to /tmp :
>
> sys@localhost:~$ sudo lvresize --size -2G /dev/mapper/localhost-home
> sys@localhost:~$ sudo lvresize --size +2G /dev/mapper/localhost-tmp
>
> According to df, it did so:
>
> sys@localhost:~$ df
> Filesystem 1K-blocks Used Available Use% Mounted on
> rootfs 329233 219069 93166 71% /
> udev 10240 0 10240 0% /dev
> tmpfs 304560 756 303804 1% /run
> /dev/mapper/localhost-root 329233 219069 93166 71% /
> tmpfs 5120 0 5120 0% /run/lock
> tmpfs 609100 80 609020 1% /run/shm
> /dev/sda1 233191 31650 189100 15% /boot
> /dev/mapper/localhost-home 289312040 11966292 262649508 5% /home
> /dev/mapper/localhost-tmp 2408315 11231 2273129 1% /tmp
> /dev/mapper/localhost-usr 8647944 5745732 2462916 70% /usr
> /dev/mapper/localhost-var 2882592 916600 1819560 34% /var
> sys@localhost:~$
>
> It seems that /dev/mapper/localhost-tmp was about 2.4 GB so I wanted to
> resize newly changed filesystems:
>
> sys@localhost:~$ sudo resize2fs /dev/mapper/localhost-home
> resize2fs 1.42.5 (29-Jul-2012)
> Filesystem at /dev/mapper/localhost-home is mounted on /home; on-line
> resizing required
> resize2fs: On-line shrinking not supported
>
> Similar output was with e2fsck:
>
> sys@localhost:~$ sudo e2fsck -p /dev/mapper/localhost-home
> /dev/mapper/localhost-home is mounted.
> e2fsck: Cannot continue, aborting.
>
>
> sys@localhost:~$
>
> Obviously I should not have done that while being mounted (or did not know
> the proper syntax), however it did not complain with resize2fs
> /dev/mapper/localhost-tmp
>
> But after the next reboot, it stopped when tried to perform Checking file
> systems:
>
> /dev/mapper/localhost-home: The filesystem size (according to the
> superblock) is 73481216 blocks
> The physical size of the device is 72956928 blocks
> Either the superblock or the partition table is likely to be corrupt!
>
> /dev/mapper/localhost-home: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.
> (i.e., without -a or -p options)
>
> Anyway, the other segments of the filesystem were clean, so by CONTROL-D
> it was possible to terminate the shell, so to resume system boot.
>
> My question is how to solve that inconsistency issue now? At first I tried
> with dumpe2fs in searching for backup superblocks, then with e2fsck -b
> <one_of_those_backup_superblocks_from_the_list>, but without resolution.
> I mean the inconsistency is not fixed. Probably I do not use e2fsck
> properly even when /home is not mounted. So the machine still keeps
> stopping during the boot at filesystem check, so I have to continue booting
> by pressing CONTROL-D.
>
> Any suggestion?
>
>
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--
esta es mi vida e me la vivo hasta que dios quiera
