Public domain
root@uranus:~# df -hT
Filesystem Type Size Used Avail Use% Mounted on
/dev/root reiserfs 49G 48G 1.3G 98% /
/dev/sda3 reiserfs 416G 2.0G 414G 1% /storage
tmpfs tmpfs 986M 0 986M 0% /dev/shm
root@uranus:~# umount /dev/sda3
root@uranus:~# reiserfsck --check /dev/sda3
reiserfsck 3.6.21 (2009 www.namesys.com)
*************************************************************
** If you are using the latest reiserfsprogs and it fails **
** please email bug reports to reiserfs-list@namesys.com, **
** providing as much information as possible -- your **
** hardware, kernel, patches, settings, all reiserfsck **
** messages (including version), the reiserfsck logfile, **
** check the syslog file for any related information. **
** If you would like advice on using this program, support **
** is available for $25 at www.namesys.com/support.html. **
*************************************************************
Will read-only check consistency of the filesystem on /dev/sda3
Will put log info to 'stdout'
Do you want to run this program?[N/Yes] (note need to type Yes if you do):Yes
###########
reiserfsck --check started at Thu Apr 5 18:01:14 2012
###########
Replaying journal: Done.
Reiserfs journal '/dev/sda3' in blocks [18..8211]: 0 transactions replayed
Checking internal tree.. finished
Comparing bitmaps..finished
Checking Semantic tree:
finished
No corruptions found
There are on the filesystem:
Leaves 499
Internal nodes 4
Directories 4
Other files 56
Data block pointers 501231 (0 of them are zero)
Safe links 0
###########
reiserfsck finished at Thu Apr 5 18:01:38 2012
###########
root@uranus:~# resize_reiserfs -s 50G /dev/sda3
resize_reiserfs 3.6.21 (2009 www.namesys.com)
You are running BETA version of reiserfs shrinker.
This version is only for testing or VERY CAREFUL use.
Backup of you data is recommended.
Do you want to continue? [y/N]:y
Processing the tree: 0%....20%....40%....60%....80%....100% left 0, 9837 /sec
nodes processed (moved):
int 4 (4),
leaves 499 (481),
unfm 501231 (486441),
total 501734 (486926).
check for used blocks in truncated region
ReiserFS report:
blocksize 4096
block count 13107200 (109034240)
free blocks 12596856 (108520968)
bitmap block count 400 (3328)
Syncing..done
resize_reiserfs: Resizing finished successfully.
root@uranus:~# fdisk /dev/sda
Command (m for help): p
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x33683367
Device Boot Start End Blocks Id System
/dev/sda1 2048 2099199 1048576 82 Linux swap
/dev/sda2 2099200 104499199 51200000 83 Linux
/dev/sda3 104499200 976773167 436136984 83 Linux
Command (m for help): d
Partition number (1-4): 3
Command (m for help): p
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x33683367
Device Boot Start End Blocks Id System
/dev/sda1 2048 2099199 1048576 82 Linux swap
/dev/sda2 2099200 104499199 51200000 83 Linux
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4, default 3): 3
First sector (104499200-976773167, default 104499200):
Using default value 104499200
Last sector, +sectors or +size{K,M,G} (104499200-976773167, default 976773167): +50G
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
reboot
BY: Pejman Moghadam
TAG: partitioning, reiserfs, shrink, resize, fdisk
DATE: 2012-04-07 16:21:54