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Re: call for brave ext4 testers in F9, with caveats



Clyde Kunkel wrote:

> Today, 20080207, installed Fedora 9 Alpha on LV (except home is ext3 part). 
> Specified ext4 during partitioning.  Seems to be ok, but: system-config-lvm 
> says the LV is ext3.  I don't know how to disply the file system type for an 
> LV except with system-config-lvm.  

urgh another utility to teach about ext4dev... :)

> Does anyone reading this know of a safe 
> way to check?

A few ways; try blkid on the device itself:

[root magnesium]# blkid /dev/sda5
/dev/sda5: LABEL="/" UUID="eead86f1-51f5-4795-b46f-e05180df9ee8"
TYPE="ext4"

or once the filesystem is updated with Ted's new flag:

[root magnesium]# debugfs -w /dev/sda5
debugfs 1.40.5 (27-Jan-2008)
debugfs:  set_super_value s_flags 4
debugfs:  quit

it'll show as ext4dev (also needed for the most recent kernels to mount it):

[root magnesium]# blkid /dev/sda5
/dev/sda5: LABEL="/" UUID="eead86f1-51f5-4795-b46f-e05180df9ee8"
TYPE="ext4dev"

or use the file utility:
[root magnesium]# file -s /dev/sda5
/dev/sda5: Linux rev 1.0 ext4 filesystem data (extents) (large files)


-Eric


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