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General Operating Guidelines and Limitations
StorNext User’s Guide 345
All Be aware of the following limitations regarding file systems and stripe
groups:
• The maximum number of disks per file system is 512
• The maximum number of disks per data stripe group is 128
• The maximum number of stripe groups per file system is 256
• The maximum number of tape drives is 256
To prevent data loss and aid disaster recovery, Quantum recommends
adjusting policy settings to retain two copies of critical data. In addition, data
stored to a storage disk should be stored on RAID (or, if only one copy is
retained, the RAID should be mirrored). This way, in the event of a disk
failure, no data is lost.
The trashcan feature has been removed in StorNext 3.0. Before upgrading to
StorNext 3.0, you must empty the trashcan on all file systems where this
feature is enabled. If the trashcan directories are not removed, the upgrade
will fail.
To empty the trashcan on a file system where it is enabled, change to the file
system directory (for example
/stornext/snfs1). Then, at the command
prompt, type:
rm -rf TrashCan
Repeat this procedure for all file systems.
StorNext File System is incompatible with third-party portmappers.
Hot re-zoning of SAN fabrics is not supported.
Affinity names cannot be longer than eight characters. StorNext truncates
affinity names after the eighth character, so if you have two or more affinities
whose first eight characters are identical, StorNext considers them the same
affinity. For example, if you have affinities called “affdata01” and
“affdata02,” StorNext sees them both as “affdata0” and treats them as the
same affinity.
For managed file systems only, the maximum directory capacity is 50,000
files per single directory. (This limitation does not apply to unmanaged file
systems.)
Operating System /
Affected Component Description