dumpfs Command
Purpose
Dumps file system information.
Syntax
dumpfs { FileSystem | Device }
Description
The dumpfs command prints out the superblock, i-node map, and disk map information for the file system or special device specified. This listing is used to find out file system information. Primarily, the dumpfs command is for debugging purposes.
The dumpfs command can also run against a JFS2 snapshot. The dumpfs command
prints out the superblock, snapshot map, and block map xtree copy
for the specified snapshot.
Note: The dumpfs command will not work on UDF, NFS, or JFS diskettes.
Security
Attention RBAC users: This command can
perform privileged operations. Only privileged users can run privileged operations. For more
information about authorizations and privileges, see Privileged Command Database in Security. For a list of privileges and the
authorizations that are associated with this command, see the lssecattr
command or the getcmdattr subcommand.
Examples
To print the information for /dev/hd4, enter:
dumpfs /dev/hd4