Hello,
Question:
What would be the steps required to 'Shrink an Empty Reiser4 partition' ?
Is their some code to do this or could be used/adapted to 'Shrink an
Empty Reiser4 partition' ?
Thanks
--Glenn
# fdisk -l
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
Disk label type: dos
Disk identifier: 0x0009a8dd
Device Boot Start End Blocks Id System
/dev/sdb2 3221225472 3907028991 342901760 83 Linux
b2 3221225472 3907028991 342901760 83 Linux
orac:~ # debugfs.reiser4 /dev/sdb2
debugfs.reiser4 1.1.0
Format release: 4.0.1
Copyright (C) 2001-2005 by Hans Reiser, licensing governed by
reiser4progs/COPYING.
Master super block (16):
magic: ReIsEr4
blksize: 4096
format: 0x0 (format40)
uuid: 139d06a8-1886-44a0-a058-8f9da1ab88cf
label: <none>
Format super block (17):
plugin: format40
description: Disk-format plugin.
version: 1
magic: ReIsEr40FoRmAt
mkfs id: 0x14b9244f
flushes: 18446744073709551615
blocks: 85725440
free blocks: 85722778
root block: 31
tail policy: 0x2 (smart)
next oid: 0x1961e
file count: 1
tree height: 3
key policy: LARGE
FS status block (21):
FS marked consistent
# debugfs.reiser4 /dev/sdb2 --print-tree
debugfs.reiser4 1.1.0
Format release: 4.0.1
Copyright (C) 2001-2005 by Hans Reiser, licensing governed by
reiser4progs/COPYING.
NODE (31) LEVEL=3 ITEMS=1 SPACE=4022 MKFS ID=0x14b9244f
FLUSH=0xffffffffffffffff
#0 NPTR (nodeptr40): [29:1(SD):0:2a:0] OFF=28, LEN=8, flags=0x0 [32]
==============================================================================
NODE (32) LEVEL=2 ITEMS=1 SPACE=4022 MKFS ID=0x14b9244f FLUSH=0x0
#0 NPTR (nodeptr40): [29:1(SD):0:2a:0] OFF=28, LEN=8, flags=0x0 [33]
==============================================================================
NODE (33) LEVEL=1 ITEMS=2 SPACE=3796 MKFS ID=0x14b9244f FLUSH=0x0
#0 SD (stat40): [29:1(SD):0:2a:0] OFF=28, LEN=94, flags=0x0
exts: 3
mask: 0x13
plugin: sdext_lw
offset: 2
len: 14
mode: drwxr-xr-x
nlink: 3
size: 2
plugin: sdext_unix
offset: 16
len: 28
uid: 0
gid: 0
atime: Tue Apr 11 18:24:21 2017
mtime: Tue Apr 11 21:57:42 2017
ctime: Tue Apr 11 21:57:42 2017
rdev: 100
bytes: 100
plugin: sdext_plugin_set
offset: 44
len: 50
Pset count: 12
permission : id = 0
formatting : id = 2 (smart)
hash : id = 1 (r5_hash)
fibration : id = 2 (ext_1_fibre)
statdata : id = 0 (stat40)
diritem : id = 2 (cde40)
crypto : id = 0
digest : id = 0
compress : id = 0 (lzo1)
compressMode : id = 4 (conv)
cluster : id = 0 (64K)
create : id = 4 (ccreg40)
------------------------------------------------------------------------------
#1 DIRITEM (cde40): [2a:0(NAME):0:0:0] OFF=122, LEN=102, flags=0x0
NR(2) NAME OFFSET HASH
SDKEY
0 . 54
0000000000000000:0000000000000000 0000291:000002a
1 .. 78
0000000000000000:0000000000000000 0000291:000002a
==============================================================================
# mount /dev/sdb2 /media/disk2
# ll /media/disk2
total 0
# umount /dev/sdb2
# debugfs.reiser4 -P /dev/sdb2 | gzip -9 > /tmp/r4metadata-sdb2.gz
debugfs.reiser4 1.1.0
Format release: 4.0.1
Copyright (C) 2001-2005 by Hans Reiser, licensing governed by
reiser4progs/COPYING.
# ll /tmp/r4metadata-sdb2.gz
-rw-r--r-- 1 root users 14916 Apr 23 19:14 /tmp/r4metadata-sdb2.gz
Attachment:
r4metadata-sdb2.gz
Description: GNU Zip compressed data
