How to check the FS is in largefile or not.

[Kenny Chau]

Hi,
Besides looking at the fstab, I want to know how to check the File system is in largefiles. Any commands can do this?

Thanks.

[Patrick Wallek]

You can use the fsadm command to check if a LV supports large files. For more info see 'man fsadm'

To check for largefiles do:

fsadm /dev/vg??/lvol??

To set the largefiles option do:

fsadm -o largefiles /dev/vg??/lvol??

[Michael Tully]

Hi,

You would normally look in /etc/fstab for that
type of information.
To change an existing filesystem you need to use the fsadm command.

# fsadm -F vxfs -o largefiles /dev/yourvg/yourlv

See the man page for more details

man fsadm
man fsadm_vxfs

HTH
Michael

[Wieslaw Krajewski · Accepted solution]

Hi,

Just to add to Patric's answer, you should use character device file:

fsadm /dev/vg##/rlvol##

or mount point

fsadm /dir_mount_point

To configure to admmit large files a file system should be umounted.

Rgds.

[federico_3]

To check if a FS is largefiles:

fsadm /dev/vgxx/rlvolxx

or:

cat /etc/fstab | grep lvolxx


Federico

[Bill McNAMARA_1]

Normally
fstyp on the /dev/vgXYZ/lvolXY
will tell this, but in either case if a filesystem is created with the largefiles option it should also be mounted with the largefiles option and the mount command will tell you that.

Later,
Bill

[Magdi KAMAL]

Hi,

1. fsadm /dev/vg##/rlvol##
Attention to character device in the path.

fsadm /mountPointDirectory


Magdi

[Joseph Hoh]

fstyp -v /dev/vgxx/lvolxx

f_flag=16 (largefiles)
f_flag=0 (no largefiles)

[Mark Landin]

You could always cat two 1.5GB files together and see if it fails. :)

[David Child_1]

What I usually use to find out info like this is:
# mkfs -m /dev/vg??/lvol??

This will show you all the options that were used when the file system was created.

$ man mkfs
...
-m Display the command line that was used to create the file system. The file system must already exist. This option provides a means of determining the parameters used to construct the file system.

Hope you find this as useful as I do ;^)

David