How to identify the HP-UX file system type ?

[Kenn Chen]

Whether online or non-online JFS ?

[A. Clay Stephenson]

Hi:

There is no such thing as an OnlineJFS (or VxFS) filesystem type. If your have the OnlineJFS extensions you simply have more features available. Simply do a swlist and
look for OnlineJFS (or Advanced JFS). If it's there, you have it and can use all the features and mount options. If not ...

Clay

[James R. Ferguson · Accepted solution]

Hi:

Do this:

To see if you have Online JFS installed, do:

# swlist -l bundle|grep -i JFS

If the output of this command does *not* show a component with the word "Online" then you do not have Online JFS. The Online version is a separate add-on to the base product.

...JRF...

[Frank Li]

You can use "fstye " command to identify the file system type .
eg: fstyp /dev/vg00/lvol1

OnlineJFS is added furture of JFS/VxFS if you install Online JFS product . It's also the JFS/VxFS filesystem.

[James R. Ferguson]

Hi (again):

If you are interested in the *version* of JFS a filesytem exists in, then do:

# fstyp -v /dev/vgXX/lvolX

From the mkfs_vxfs(1M) man page:

'mkfs' builds a file system with a root directory and a lost+found directory (see fsck_vxfs(1M)). The file system can have disk layout Version 2, disk layout Version 3, or disk layout Version 4. Version 2 supports dynamic inode allocation. Version 3 adds support forlarge files and large UIDs. Version 4 adds support for Access Control Lists. On HP-UX 11.1x systems, the default is Version 4. On HP-UX 11.0 systems, the default is Version 3.

Document #S3100004807 notes:

Both vxupgrade and fstyp report the layout version. The JFS version (3.1 vs. 3.3) and the layout version (3 vs. 4) need to be clearly separated. Disk layout 3 can be used by either JFS version, while layout version 4 can only be used by JFS version 3.3. The filesystem is not stamped with anything to indicate if it was created with JFS version 3.1 or 3.3, it is just created with a layout version that can be understood by the version of JFS used to create it.

To ascertain whether you have JFS 3.1 or 3.3, do:

# swlist -l fileset B5118BA #...for 3.1
# swlist -l fileset B3929CA #...for 3.3

...JRF...