On Fri, 16 Mar 2007 at 2:11pm, Florin Andrei wrote
Joshua Baker-LePain wrote:
On Fri, 16 Mar 2007 at 2:41pm, Mark Hull-Richter wrote
What is the best way to accomplish step two of this - reformatting the
partition? I've only done this so far during the installation phase,
and that was for partitions I knew I could destroy with impunity. I'm
guessing I unmount the drive, <do something magic here> and remount it.
It's the magic part I don't know.
'man mke2fs' has all the details. I usually do:
mke2fs -b 4096 -j -m 1 -O dir_index $DEVICE
What are the parameters used by the installer to format a partition?
I believe it's simply "mke2fs -j $DEVICE" but I may be wrong.
Have a look with tune2fs (see below). Default mke2fs behavior (on centos4
at least) does *not* turn on dir_index, thus why I included it above.
Also, mke2fs defaults to having the new filesystem checked every so many
days or mounts, which anaconda turns off. So a mke2fs should be followed
by:
tune2fs -c0 -i0 $DEVICE
[jlb@chaos ~]$ sudo tune2fs -l /dev/hda1
tune2fs 1.35 (28-Feb-2004)
Filesystem volume name: /1
Last mounted on: <not available>
Filesystem UUID: 5679b769-446c-48f4-aea9-a72cfe61f38a
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: has_journal ext_attr resize_inode dir_index
filetype needs_recovery sparse_super large_file
Default mount options: (none)
Filesystem state: clean
Errors behavior: Continue
Filesystem OS type: Linux
Inode count: 1048576
Block count: 2096474
Reserved block count: 104823
Free blocks: 969847
Free inodes: 889498
First block: 0
Block size: 4096
Fragment size: 4096
Reserved GDT blocks: 511
Blocks per group: 32768
Fragments per group: 32768
Inodes per group: 16384
Inode blocks per group: 512
Filesystem created: Thu Sep 22 03:59:32 2005
Last mount time: Thu Feb 8 12:36:33 2007
Last write time: Thu Feb 8 12:36:33 2007
Mount count: 29
Maximum mount count: -1
Last checked: Thu Sep 22 03:59:32 2005
Check interval: 0 (<none>)
Reserved blocks uid: 0 (user root)
Reserved blocks gid: 0 (group root)
First inode: 11
Inode size: 128
Journal inode: 8
First orphan inode: 776382
Default directory hash: tea
Directory Hash Seed: 1c2cefd8-ed4a-49f0-9048-1de30d1ac4b6
Journal backup: inode blocks
--
Joshua Baker-LePain
Department of Biomedical Engineering
Duke University
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