A-108Dell PowerVault 720N, 740N, and 760N System Administrator and Command Reference Guide
the filer is rebooted. If you change your mind after entering this command,
you can enter vol online volname before the reboot.
vol options volname optname optval
sets the option named optname of the volume named vol_name to the value
optval. The command remains effective after the filer is rebooted, so there is
no need to add vol options commands to the /etc/rc file. Some options have
values that are numbers. Some options have values that may be on (which
can also be expressed as yes, true, or 1) or off (which can also be expressed
as no, false, or 0). You can use a mixture of uppercase and lowercase charac-
ters when typing the value of an option. The root option is special in that it
does not have a value. To set the root option, use this syntax:
vol options volname root
The following describes the options and their possible values:
root The volume named volname will become the root volume for the filer on the
next reboot. This option can be used on one volume only at any given time.
The existing root volume will become a nonroot volume after the reboot. The
only way to remove the root status of a volume is to set the root option on
another volume.
raidsize number
The value of this option is the maximum size of a RAID group within the vol-
ume. Changing the value of this option will not cause existing RAID groups
to grow or shrink; it will only affect whether more disks will be added to the
last existing RAID group and how large new RAID groups will be.
minra on | off
If this option is on, the filer performs minimal read-ahead on the volume. By
default, this option is off, causing the filer to perform very aggressive read-
ahead on the volume.
no_atime_update on | off
If this option is on, it prevents the update of the access time on an inode
when a file is read. This option is useful for volumes with extremely high
read traffic, since it prevents writes to the inode file for the volume rom con-
tending with reads from other files. It should be used carefully. That is, use
this option when you know in advance that the correct access time for
inodes will not be needed for files on that volume.
nosnap on | off
If this option is on, it disables automatic snapshots on the volume.
nosnapdir on | off
If this option is on, it disables the visible .snapshot directory that is normally
present at client mount points, and turns off access to all other .snapshot
directories in the volume.
nvfail on | off
If this option is on, the filer performs additional status checking at boot time
to verify that the NVRAM is in a valid state. This option is useful when
vol