An administrator created logical volume fs01l to contain a JFS2 file system. When trying to create the filesystem the crfs command gives an error. Given the following logical volume definition…

The crfs syntax shown would still fail because it does not address the underlying misconfigured LV type attribute; the LV must first be typed as jfs2 before crfs will succeed.

mklv creates a brand-new logical volume and would produce a duplicate-name error since fs01lv already exists; it does not correct the type attribute of the existing volume.

chdev modifies device driver attributes in the ODM but type=jfs2 is not a valid chdev attribute for a logical volume; logical volume type is managed through chlv, not chdev.

The chlv -t jfs2 fs01lv command sets the logical volume type attribute in the ODM to jfs2, which is a prerequisite for crfs to recognize the LV as a valid JFS2 container. Without this type assignment the crfs command fails because it checks the LV type before attempting filesystem creation.