3.1.2 Matrix Server Administration Guide

Chapter 7: Configure PSFS Filesystems 95

The -o option has the following parameters:

• disable-fzbm

Create the filesystem without Full Zone Bit Maps (FZBM). See the

PolyServe Knowledge Base article “Using the FZBM On-Disk

Filesystem Format” for more information about this feature.

• enable-quotas

Enables quotas on the filesystem.

• userdefault=<size> and groupdefault=<size>

Set the default quota limit for users or groups, respectively, to size

bytes. (The defaults are rounded down to the nearest filesystem

block.) The <size> argument can include one of the following optional

modifiers to specify the unit: K (kilobytes), M (megabytes), G

(gigabytes), or T (terabytes). If one of these modifiers is not specified,

the <size> will be interpreted in bytes. If the default quota limit is not

specified on the command line, the limit will be set to 0, which means

there is no default limit.

The userdefault and groupdefault parameters are invalid if the enable-

quotas parameter is not also specified.

The following command shows the syntax for the quotas parameters:

mkpsfs -o enable-quotas,userdefault=#[T|G|M|K],groupdefault=#[T|G|M|K] dev

If no -o options are specified, the filesystem will be created with Full Zone

Bit Maps (FZBM) and without quotas.

Mount a Filesystem

You can mount a PSFS filesystem on any server that can access the storage

extent over the SAN. The directory mountpoint for the filesystem must

exist before the filesystem is mounted.

The filesystem must be mounted either read-write or read-only across the

matrix. It cannot be mounted read-only on one server and read-write on

another server. To change the way the filesystem is mounted, first

unmount it on all servers, then remount it.