EMC Celerra Command Reference Manual page 175

The nas Commands
System Extension is turned on, the file system is automatically
extended up to the maximum size specified when the high water
mark is reached. The default for -auto_extend is no.
Virtual provisioning reports the maximum file system size to the
CIFS, NFS, and FTP users, even if the actual size of the file system
is smaller. If disabled, the true file system size and maximum file
system sizes are reported to the system administrator. Virtual
provisioning requires that a maximum file system size also be set.
Note: SRDF pools are not supported.
[-hwm <50-99>%]
Specifies the size threshold that must be reached before the file
system is automatically extended. Enter an integer between the
range of 50 and 99 to represent the percentage of file system
usage. The default is 90.
[-max_size <integer> [T|G|M]]
Sets the maximum file system size to which a file system can be
extended. Enter an integer and specify T for terabytes, G for
gigabytes (default), M for megabytes. If the -max_size is not
specified, then it defaults to the maximum limit of the file system
size which is 16 terabytes. Maximum size must be set to enable
virtual provisioning. The maximum size is what is presented to
users as the file system size through virtual provisioning.
[-option <options>]
Specifies the following comma-separated option(s):
nbpi= <number>
The number of bytes per inode block. The default is 8192 bytes.
mover=<movername>
Assigns an optional Data Mover on which to build a file system.
If no Data Mover is assigned, the system will automatically pick
the first available Data Mover to build the file system.
slice={y|n}
Specifies whether the disk volumes used by the new file system
may be shared with other file systems using a slice. The slice=y
option allows the file system to share disk volumes with other file
systems. The slice=n option insures that the new file system has
exclusive access to the disk volumes it uses, and is relevant when
using TimeFinder/FS.
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