[olug] How to tell the FS type of a partition?

[Brian Roberson]

no, fstab does not get updated by the mount command, so if you converted the
fs to ext3, fstab would not show you this.

the only way to be sure is to use the tune2fs command to look at the
superblock, OR the mount command to force a suberblock discovery.


here is the output of a ext2 fs:

linux13:~ # tune2fs -l /dev/sda1
tune2fs 1.19, 13-Jul-2000 for EXT2 FS 0.5b, 95/08/09
Filesystem volume name:   <none>
Last mounted on:          <not available>
Filesystem UUID:          25a79d53-77bc-4bf4-9587-31df77d38bfa
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      filetype sparse_super
Filesystem state:         not clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              78312
Block count:              312007
Reserved block count:     15600
Free blocks:              187601
Free inodes:              68943
First block:              1
Block size:               1024
Fragment size:            1024
Blocks per group:         8192
Fragments per group:      8192
Inodes per group:         2008
Inode blocks per group:   251
Last mount time:          Mon Jun 10 06:05:02 2002
Last write time:          Tue Jul 16 13:01:36 2002
Mount count:              1
Maximum mount count:      20
Last checked:             Mon Jun 10 06:05:02 2002
Check interval:           15552000 (6 months)
Next check after:         Sat Dec  7 05:05:02 2002
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:               128
linux13:~ #


here is the output of an ext3 fs:


users:~ # tune2fs -l /dev/hda1
tune2fs 1.24a (02-Sep-2001)
Filesystem volume name:   <none>
Last mounted on:          <not available>
Filesystem UUID:          9ab1ec90-360f-45a2-a0ba-29063088b899
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal filetype sparse_super
Filesystem state:         not clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              78312
Block count:              313236
Reserved block count:     15661
Free blocks:              113224
Free inodes:              59350
First block:              1
Block size:               1024
Fragment size:            1024
Blocks per group:         8192
Fragments per group:      8192
Inodes per group:         2008
Inode blocks per group:   251
Last mount time:          Mon Mar 18 04:56:25 2002
Last write time:          Tue Jul 16 02:00:10 2002
Mount count:              1
Maximum mount count:      25
Last checked:             Mon Mar 18 04:56:16 2002
Check interval:           15552000 (6 months)
Next check after:         Sat Sep 14 05:56:16 2002
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:               128
Journal UUID:             <none>
Journal inode:            8
Journal device:           0x0000
First orphan inode:       0
users:~ #




----- Original Message -----
From: "Jeff Hinrichs" <JeffH at delasco.com>
To: <olug at olug.org>
Sent: Tuesday, July 16, 2002 2:06 PM
Subject: RE: [olug] How to tell the FS type of a partition?


> Would fstab be a reliable source of information?
>
> thanks
>
> > -----Original Message-----
> > From: Phil Brutsche [mailto:phil at brutsche.us]
> > Sent: Tuesday, July 16, 2002 1:57 PM
> > To: olug at olug.org
> > Subject: Re: [olug] How to tell the FS type of a partition?
> >
> >
> > Jeff Hinrichs wrote:
> > > How do you find out what File system a partition is
> > formatted as? i.e.
> > > ext2 or ext3?
> >
> > Just about the only way to reliably find out is to try to
> > mount it.  All
> > Linux partitions are of type 0x82 or 0x83 :(
> >
> >
> > Phil
> >
> >
> > -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
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