is there a way to tell that you have ext4 filesystem vs ext3

[Antonio Olivares]

--- On Fri, 10/3/08, Jeremy Katz <katzj at redhat.com> wrote:

> From: Jeremy Katz <katzj at redhat.com>
> Subject: Re: is there a way to tell that you have ext4 filesystem vs ext3
> To: olivares14031 at yahoo.com, "For testers of Fedora Core development releases" <fedora-test-list at redhat.com>
> Date: Friday, October 3, 2008, 6:43 PM
> On Fri, 2008-10-03 at 17:23 -0700, Antonio Olivares wrote:
> > Is there a way to tell if one is running ext4
> filesystem vs. ext3?
> > 
> > I used ext4 boot parameter to install Fedora 10 Beta,
> but I am not sure that the filesystem is ext4 :(
> 
> libblkid can tell the difference
>    /sbin/blkid -s TYPE /path/to/blkdev
> 
> Jeremy

Jeremy,

Thank you very much, and to all who also have answered.  I have found out that i am running indeed ext4, but it says ext4dev, Here's the proof

[olivares at riohigh ~]$ su -
Password: 
[root at riohigh ~]# /sbin/blkid -s TYPE /path/to/blkdev
[root at riohigh ~]# /sbin/blkid -s TYPE /dev/
Display all 238 possibilities? (y or n)
[root at riohigh ~]# /sbin/blkid -s TYPE /dev/s
scd0        sda2        sda6        sg0         snapshot    stderr
scd1        sda3        sda7        sg1         snd/        stdin
sda         sda4        sequencer   sg2         sr0         stdout
sda1        sda5        sequencer2  shm/        sr1         systty
[root at riohigh ~]# /sbin/blkid -s TYPE /dev/sda1 
/dev/sda1: TYPE="ext3" 
[root at riohigh ~]# /sbin/blkid -s TYPE /dev/sda2
/dev/sda2: TYPE="ext3" 
[root at riohigh ~]# /sbin/blkid -s TYPE /dev/sda3
/dev/sda3: TYPE="lvm2pv" 
[root at riohigh ~]# /sbin/blkid -s TYPE /dev/sda4
[root at riohigh ~]# /sbin/blkid -s TYPE /dev/sda5
/dev/sda5: TYPE="ext4dev" 
[root at riohigh ~]# /sbin/blkid -s TYPE /dev/sda6
/dev/sda6: TYPE="swap" 
[root at riohigh ~]# /sbin/blkid -s TYPE /dev/sda7
/dev/sda7: TYPE="ext3" 
[root at riohigh ~]# /sbin/blkid -s TYPE /dev/sda8
[root at riohigh ~]# fdisk -l

Disk /dev/sda: 320.0 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xaf7caf7c

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          12       96358+  83  Linux
/dev/sda2           31841       31865      200812+  83  Linux
/dev/sda3           31866       38913    56613060   8e  Linux LVM
/dev/sda4              13       31840   255658410    5  Extended
/dev/sda5              13       26108   209616088+  83  Linux
/dev/sda6           26109       26239     1052226   82  Linux swap / Solaris
/dev/sda7           26240       31840    44990001   83  Linux

Partition table entries are not in disk order
[root at riohigh ~]# 


sda5 is the partion in which F10 Beta resides: 

[root at riohigh ~]# /sbin/blkid -s TYPE /dev/sda5
/dev/sda5: TYPE="ext4dev" 

Best regards,

Antonio