Mount Option Mount Description
maxiowidth maxiowidth
princ Override for principal
auth Override for authorization type
key Override keytab type
keytab Override for keytab file
stage / nostage Default is stage. This overrides the COS setting. Application can override this by
specifying O_NONBLOCK on the open() system call. An application cannot override
the nostage setting. Most standard Linux commands / library functions do not
specify O_NONBLOCK so this mount point option will determine what happens.
nfs Only specify this if nfs is using this mount point.
14.4.4. Un-mounting an HPSS Filesystem
The mount(8) command (without command line parameters) can be used to view the list of hpssfs
mounted entries. An example of a mounted hpssfs entry is as follows:
hpssfs(2553:2554):/ on /tmnt type
hpssfs(rw,noauto,san,dio,ip=eth2,cos=96)
where:
•2553 is the HPSS VFS Daemon process ID
•2554 is the HPSS VFS Mount Helper group ID
The umount(8) command is used to unmount the above mounted file system. For example:
# su -
# umount /tmnt
14.4.5. Linux ‘proc’ Filesy stem Statistics
The VFS Interface provides a Linux proc filesystem that contains run-time statistic. The statistics can be
viewed by running the 'cat' utility on various proc filesystem files.
•Show kernel module version:
# cat /proc/fs/hpssfs/version
•List all active SAN3P LUNs and their associated path:
# cat /proc/fs/san
•Show or update current trace level for a mounted file system. Valid trace levels are 1 to 5 from
least to most.
# cat /proc/fs/hpssfs/<group ID>/trace
HPSS Management Guide November 2009
Release 7.3 (Revision 1.0) 354