4.0.0 HP Polyserve Matrix Server Administration Guide (T5392-96052, March 2010)

8.3 Short File Names and name tunneling
By default, PSFS filesystems do not support the creation of 8.3 short file names (SFN)
and name tunneling; however, support for these features can be enabled on specific
filesystems. These features should be enabled only if you have a specific need for
them, as the use of 8.3 files causes degradation in filesystem performance. The
degradation is proportional to the number of 8.3 files created. If 8.3 SFN support
is later disabled but 8.3 filenames exist, the performance degradation will continue.
Use the following psfscheck command to enable these features on a specific PSFS
filesystem. Before running the command, be sure that the volume is not in use.
psfscheck -e enable8dot3 <device>
In the command, device can be specified in several ways:
• By the drive letter, such as X:
• By the mount point (junction), such as C:\san\vol2
• By the psd or psv name, such as psd2p2 or psv1
When 8.3 support is enabled, applications requiring 8.3 short file names and name
tunneling will work correctly. Filesystems enabled for 8.3 support cannot be mounted
on Matrix Server versions earlier than 3.6.1, even if the 8.3 support is later disabled.
8.3 support can be disabled on a filesystem by using the following command. Before
running the command, be sure that the volume is not in use.
psfscheck -e disable8dot3 <device>
When 8.3 support is disabled, 8.3 file names will no longer be created and the
name tunnel cache will be purged and removed.
Using the extended character set
Using the extended character set in 8.3 file names can be allowed or disallowed
cluster-wide. (By default, it is disallowed.) Use the following commands to allow or
disallow the use of the extended character set. Before running the commands, be
sure that the volume is not in use.
psfscheck -e allowextchar
psfscheck -e disallowextchar
You can combine options in a single command. For example, you can specify both
8.3 support and the extended character set:
Configure PSFS filesystems122