volmend(8) System Manager's Manual volmend(8)
NAME
volmend - Mends simple problems in configuration records
SYNOPSIS
/usr/sbin/volmend [-g diskgroup] [-U usetype] [-o useopt] [-Vfrvps] clear field name...
/usr/sbin/volmend [-g diskgroup] [-U usetype] [-o useopt] [-Vfrvp] fix how name [arg...]
/usr/sbin/volmend [-g diskgroup] [-U usetype] [-o useopt] [-Vfrvp] off name...
/usr/sbin/volmend [-g diskgroup] [-U usetype] [-o useopt] [-Vfrvp] on name...
OPTIONS
The following options are recognized: Specifies the disk group for the operation, either by disk group ID or by disk group name. By
default, the disk group is chosen based on the name operands. Limits the operation to apply to the specified usage type. Attempts to
affect volumes with a different usage type will fail. Passes in usage-type-specific options to the operation.
The fsgen, gen, and raid5 usage types support the following useopt argument: Forces an operation that internal consistency checks
consider to be questionable. This applies to attempts to use volmend fix empty to uninitialize a volume that has plexes in the
ACTIVE state, and also to attempts to disable the last plex, or the last complete (non-sparse) plex, in a volume. This flag is the
same as -f.
The fsgen and gen usage types support the following additional useopt arguments: Requires that any named plex or subdisk record be
associated, directly or indirectly, with a volume named volume. Several vol options can be specified to indicate a list of allowed
volume names. Requires that any named subdisk record be associated with a plex named plexname. Several plex options can be speci-
fied to indicate a list of allowed plex names. Displays a list of utilities that would be called from volmend, along with the argu-
ments that would be passed. The -V option performs a ``mock run'' so the utilities are not actually called. Forces an operation
that the Logical Storage Manager considers potentially dangerous or unnecessary. This enables a limited set of additional operations
that would normally not be allowed. Some operations may be disallowed even with this flag. Operates recursively on records associ-
ated with the named volume or plex record. Operations applied to a volume will apply to the associated plexes and subdisks. Like-
wise, operations applied to a plex may be applied to the associated subdisks. Requires that name operands name volume records.
Requires that name operands name plex records. Requires that name operands name subdisk records.
DESCRIPTION
The volmend utility performs various Logical Storage Manager usage-type-specific operations on subdisk, plex, and volume records. The first
operand is a keyword that determines the specific operation to perform. The remaining operands specify the configuration objects to which
the operation is applied.
Each invocation can be applied to only one disk group at a time, due to internal implementation constraints. Any name operands will be used
as record names to determine a default disk group, according to the standard disk group selection rules described in volintro(8). A spe-
cific disk group can be forced with -g diskgroup.
These are the recognized operation keywords for volmend: Clears specified utility fields for each named record in the disk group. An option
of -v, -p, or -s specifies that the utility operates only on volumes, plexes, or subdisks, respectively. If a record is a volume, or is
associated directly or indirectly with a volume, the clear operation is performed according to rules used by the usage type appropriate for
that volume.
The field operand is a comma-separated list of keywords specifying fields to be cleared. Valid keywords for the field operand are:
Clears all clearable utility fields. Normally, this clears all of the persistent and non-persistent utility fields. A usage-type
utility may choose a different set of fields, as appropriate. Clears all persistent utility fields. Clears all non-persistent
(temporary) utility fields. Clears a specific persistent utility field. Clears a specific non-persistent utility field.
For the fsgen and gen usage types, the number of plexes currently being attached, either directly or as part of a compound opera-
tion, is stored in the tutil0 field of the volume record as a string in the form ATTnumber. If the number drops to zero, the tutil0
field is cleared. Some operations on a volume require that the tutil0 field be cleared.
The fsgen and gen usage types support the following additional field keyword: Removes locks on a volume for a particular number of
concurrent plex attach operations.
This operation can be used to clear a volplex att operation that fails to terminate cleanly. For example, suppose that the following
command was issued and then abruptly terminated by pressing the INTERRUPT key (or equivalent): volplex att v1 v1-01
The volplex command would respond to the interruption by displaying a list of commands to run. For this example, you would run the
following commands from the list: volmend clear tutil0 v1-01 volmend clear att1 v1 volplex dis v1-01
Changes the state of a volume, plex, or subdisk named by the name operand, in a manner specified by the how string. The meaning of
this operation is entirely usage-type specific. This operation applies to volumes, or to plexes associated with a volume, or to sub-
disks of a raid5 volume. Usage-type rules appropriate for the volume are used to interpret the command. Additional arguments, after
name, are interpreted according to rules defined by the usage type.
The fsgen, gen, and raid5 usage types support the following volmend fix operations: Sets the state for the named plex to CLEAN. The
associated volume must be disabled, the named plex must be in the STALE state, and the volume must have no additional plexes in the
CLEAN state.
A volume is not startable if one plex is in the CLEAN state and some plexes are in the ACTIVE state. Thus, several volmend fix oper-
ations are normally used in conjunction to set all plexes in a volume to STALE and then to set one plex to CLEAN. A volume start
operation will then enable the CLEAN plex and recover the STALE plexes by copying data from the one CLEAN plex. Sets the state for
the named plex to ACTIVE. The state for the volume is set to SYNC. The associated volume must be disabled, and the named plex must
be in the STALE state.
When starting a volume in the SYNC state, all ACTIVE plexes are enabled and are synchronized to have the same contents using a spe-
cial read/write-back recovery mode. Any STALE plexes are then recovered by copying data from the ACTIVE plexes. Sets the state for
the named plex to STALE. The associated volume must be disabled, and the named plex must be ACTIVE or CLEAN. This operation names
plexes that will be recovered by copying data from other plexes by a volume start operation. Sets the named volume and all of its
associated plexes to the EMPTY state. The volume can then be re-initialized using volume start or any of the volume init operations.
This operation requires that the volume be disabled.
The raid5 usage type supports the following additional volmend fix operation: Clears any flags indicating that a subdisk of a RAID-5
plex is invalid. This will prevent the data on the subdisk from being recovered when the volume is started. Puts the named plexes
or volumes into an offline state. This operation can be applied only to volumes, or to plexes associated with a volume. Usage type
rules appropriate for the volume are used to perform the operation.
The fsgen and gen usage types allow volumes and plexes to be specified as operands to volmend off. A volume can be named only if -r
is used to specify recursion, and is applied to all plexes in the volume. Offlining a plex disables the plex and sets its state to
OFFLINE.
Offlining the last enabled read-write plex in a volume, or the last complete plex (if there are additional sparse plexes) will nor-
mally fail unless -f is specified. Applying this operation to a volume also disables the volume, and does not require use of -f.
If a volume is disabled, the checks for the last plex or the last complete plex are performed on the set of ACTIVE and CLEAN plexes,
rather than on enabled read-write plexes.
An offline state for a plex can be cleared with volmend on. Alternatively, an offline plex can be reattached with volplex att.
Takes the named plexes or volumes out of the offline state. This operation can be applied only to volumes, or to plexes associated
with a volume. Usage-type rules appropriate for the volume are used to perform the operation.
The fsgen and gen usage types allow volumes and plexes to be specified as operands to volmend on. The volmend on operation applied
to a plex will change the OFFLINE state for a plex to STALE, allowing the plex to be recovered by the next volume start or volume
startall. Applying volmend on to a volume will change the state for all associated OFFLINE plexes to STALE.
EXIT CODES
The volmend utility exits with a nonzero status if the attempted operation fails. A nonzero exit code is not a complete indicator of the
problems encountered but rather denotes the first condition that prevented further execution of the utility. See volintro(8) for a list of
standard exit codes.
FILES
The utility that performs volmend operations for a particular volume usage type.
SEE ALSO
volintro(8), volplex(8), volume(8)
volmend(8)