Are there any tools/code to list 'used blocks' on reiser4 volume ? [sdb] ?
 

Hello,
Are there any tools/code to list 'used blocks' on reiser4 volume ? [/dev/sdb] ?

The reason I ask is 57% unused space on volume so [100% - 43% used = 57% unused]

# df -h shows:
Filesystem Size Used Avail Use% Mounted on
/dev/sdb 1.8T 747G 1.0T 43% /media/disk


- To identify used blocks of a reiser4 volume,
- resize volume to ['last' used block allocated to a file + 1 ]
- Is that possible and safe to do so ?
- Frees up a lot of the allowable space [ 1.8T - 747G used]
- Are there any tools/code to re-size a reiser4 partition-volume ?

Thanks
--Glenn


# fsck.reiser4 --check /dev/sdb shows:
file count: 188,313

# fsck.reiser4 --check /dev/sdb
Reiser4 fs was detected on /dev/sdb.

Master super block (16):
magic: ReIsEr4
blksize: 4096
format: 0x0 (format40)
uuid: 3006ced1-7490-4ea8-a9b8-d82143c6bede
label: <none>

Format super block (17):
plugin: format40
description: Disk-format plugin.
version: 0
magic: ReIsEr40FoRmAt
mkfs id: 0x1ddaf754
flushes: 0
blocks: 488378640
free blocks: 217146980
root block: 37017218
tail policy: 0x2 (smart)
next oid: 0xedade
file count: 188313
tree height: 6
key policy: LARGE


Now using,
# rpm -qa |grep -i reiser4 |sort
kernel-reiser4-4.7.0-9.2.x86_64
libreiser4-1_1-0-1.1.0-13.1.x86_64

libreiser4-minimal-1_1-0-1.1.0-13.1.x86_64

reiser4progs-1.1.0-13.1.x86_64

reiser4progs-devel-1.1.0-13.1.x86_64


kernel now in use:
linux-4.7.tar.xz

latest reiser4 patch used:
reiser4-for-4.7.0.patch

# fdisk -l shows:
Disk /dev/sdb: 2000.4 GB, 2000398934016 bytes, 3907029168 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

references used:
http://www.spinics.net/lists/reiserf.../msg05155.html
http://www.spinics.net/lists/reiserf.../msg05154.html

Not a good idea. Unmount the filesystem, shrink it with resize_reiserfs, then reduce the block device.