NAME

rmvol − Removes a volume from an existing domain

SYNOPSIS

/usr/sbin/rmvol [−f] [−v] special domain

OPTIONS

−fForces the removal of a volume that contains one or more stripe segments without first requesting confirmation. 

−vDisplays messages that describe which files are moved off the specified volume. Using this option slows the rmvol process. 

OPERANDS

special
Specifies the block device special file name, such as /dev/disk/dsk2c, of the volume that you are removing from the domain. This command supports shorthand device names for block special devices. For example, if you enter dsk2g, it will be translated to /dev/disk/dsk2g. 

domain
Specifies the name of the domain.

DESCRIPTION

The rmvol utility enables you to decrease the number of volumes within an existing domain. When you attempt to remove a volume, the file system automatically migrates the contents of that volume to another volume in the domain. 

The logical structure of the filesets in a domain is unaffected when you remove a volume. If you remove a volume that contains a stripe segment, the rmvol utility moves the segment to another volume that does not already contain a stripe segment of the same file. If a file is striped across all volumes in the domain, the utility requests confirmation before placing a second stripe segment on a volume that has one. 

Before you can remove a volume from a domain, all filesets in the domain must be mounted. If you try to remove a volume from an active domain that includes unmounted filesets, the system displays an error message indicating that a fileset is unmounted. This message is repeated until you mount all filesets in the domain. 

If you attempt to remove a volume from an inactive domain, the system returns the ENO_SUCH_DOMAIN error message. A domain is inactive when none of its filesets is mounted. In this case, the rmvol command does not remove the volume. 

If there is not enough free space on other volumes in the domain to accept the offloaded files from the departing volume, the rmvol utility moves as many files as possible to free space on other volumes. Then a message is sent to the console indicating that there is not enough space to complete the procedure. The files that were not yet moved remain on the original volume. 

You can interrupt the rmvol process without damaging your domain. AdvFS will stop removing files from the volume. Files already removed from the volume will remain in their new location. Interrupting an rmvol operation with a system crash, a power failure, loosing the remote login, or the kill command can leave the volume in an inaccessible state. If a volume does not allow new allocations after an rmvol operation, use the chvol −A command to reactivate the volume. 

RESTRICTIONS

You cannot run the rmvol utility while the defragment, balance, rmfset, or rmvol utility is running on the same domain. 

You must be the root user to use this utility. 

NOTES

This command supports shorthand names for LSM volume names. For example, if you enter the following:

# rmvol testdg.vol1 dom1

the volume name will be translated to:

# rmvol /dev/vol/testdg/vol1 dom1

EXAMPLES

     1.The following example removes a volume from an active domain called accounts_dmn. The domain contains two volumes, /dev/disk/dsk1c and /dev/disk/dsk2c. This example removes volume /dev/disk/dsk1c from the domain:

# rmvol dsk1c accounts_dmn

The /etc/fdmns/accounts_dmn subdirectory now has only one entry, the entry for /dev/disk/dsk2c. 

     2.The following example removes one volume from a three-volume domain. Each volume in the accounts_dmn domain contains one segment of /usr/myfile, which is a three-way striped file:

# rmvol dsk3c accounts_dmn
rmvol: Removing volume ’/dev/disk/dsk3c’ from domain ’accounts_dmn’
This volume contains one stripe segment of /usr/myfile, which will
be moved to another volume in the domain that already
contains a stripe segment of /usr/myfile.
Do you want to continue? (y/n):y

One volume in the accounts_dmn domain now contains two stripe segments of myfile, which is no longer an optimally striped file. 

FILES

/usr/sbin/rmvol
Specifies the command path.

/etc/fdmns
Contains domain names and devices.

SEE ALSO

addvol(8), advfs(4), advscan(8), chvol(8), fdmns(4), mkfdmn(8), stripe(8)