HP-UX Reference (11i v2 07/12) - 1M System Administration Commands A-M (vol 3)

m
mount_vxfs(1M) mount_vxfs(1M)
The closesync , dsync, unbuffered , and
direct values all cause the equivalent of
an fsync(2) to be run when the file is closed.
The
tmpcache value disables delayed extending writes, trading off integrity for perfor-
mance. When this option is chosen, VxFS does not zero out new extents allocated as files are
sequentially written. Uninitialized data may appear in files being written at the time of a
system crash. See vxfsio(7) for an explanation of
VX_DIRECT, VX_DSYNC, and
VX_UNBUFFERED .
Note: mincache=direct, mincache=dsync
, mincache=unbuffered , and
mincache=tmpcache are available only with the HP OnLineJFS product.
noatime
Directs the file system to ignore file access time updates except when they coincide with
updates to ctime or mtime (see the stat(2)) manual page. By default, the file system is
mounted with access time (
atime) recording. You can use the
noatime option to reduce
disk activity on file systems where access times are not important.
qio|noqio
Enables or disables the VERITAS Quick I/O for Databases option for the given file system.
Quick I/O is available as a licensed feature of VxFS. By default,
mount enables Quick I/O on
the file system. If Quick I/O is not available,
mount mounts the file system without Quick
I/O. If qio is specified, but the feature is not licensed, mount prints an error message and
terminates without mounting the file system. If noqio is specified, mount disables Quick
I/O even if the license is installed.
For cluster file systems, qio is also the default if a Quick I/O license is present.
qlog[=special]
Enables the file system to use VERITAS QuickLog. QuickLog threads multiple file system
logs together and redirects the file system log writes to the special device. If special is not
specified, the file system selects one of the QuickLog special devices. This option improves
the performance of NFS servers. QuickLog is available only through other VERITAS pro-
ducts. See the VERITAS File System Release Notes for current product information.
quota Enable disk quotas (valid only for rw type file systems). VxFS maintains quota information in
a private area of the file system. If the file system is mounted with quotas enabled, and the
file system was previously mounted with quotas disabled and was modified, then the quota
information is rebuilt. This may take a while.
remount
Change the mount options for a mounted file system. In particular, remount changes the
logging and caching policies. It also changes a files system from read-only to read/write.
remount cannot change a file system from read/write to read-only, nor can it set the
sna-
pof
or snapsize attributes.
remount does not check possible changes in /etc/fstab . If you use any specific option,
you must explicitly pass it in the command line.
rw|ro Read/write or read-only. The default is
rw.
seconly
Mounts a shared file system as a secondary only. A secondary-only file system cannot assume
the primaryship for the specified shared file system. For a mount with the seconly option
to succeed, primary must already be mounted. seconly must be specified with the -o
cluster
option. The seconly option overrides any policy that was set using the
fsclustadm command. This option can be set or reset using the -o remount option. A
remount with seconly fails if the file system node is already the primary for the file sys-
tem.
snapof=filesystem
Mount the file system as a snapshot of filesystem, where filesystem is either the directory on
which a VxFS file system is mounted, or is the block special file containing a mounted VxFS
file system. An explicit -F vxfs option is required to mount a snapshot file system.
Note: snapof=filesystem is available only with the HP OnLineJFS product.
snapsize=size
Used in conjunction with snapof. size is the size in sectors of the snapshot file system being
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