HP MSA 2040 CLI Reference Guide

show volume-reservations 339
show volume-reservations
Description Shows persistent reservations for all or specified volumes. The persistent group reservations (PGR)
mechanism enables application clients on multiple hosts to control access to a storage volume, and
limits access by other hosts.
Each host must be registered with the storage system in order to establish a persistent reservation for
a volume, thereby becoming a reservation holder.
If the system gets into an abnormal state and you need to remove all registrations and reservations
for specified volumes to return them to a “clean” state, you can use the release volume command.
This command must be used with care, as described in its help.
For more information about persistent reservations, see the SPC-3 specification at
http://www.t10.org
.
Syntax
show volume-reservations
all|
volumes
Parameters all| volumes
Specifies all volumes, or the names or serial numbers of specific volumes. For volume syntax,
"Command syntax" (page 20).
Output Name
The name of the volume.
Serial Number
The serial number of the volume.
Volume Reserved
• Free: The volume is not reserved.
• Reserved: The volume has been reserved by a host.
Host ID
The host WWPN or iSCSI node name.
Port
The controller host-port identifiers.
Reservation Type
• Write Exclusive: Write commands are only allowed for a single reservation holder.
• Exclusive Access: Certain access (read, write) commands are only allowed for a single
reservation holder.
• Write Exclusive - Registrants Only: Write commands are only allowed for registered
hosts. There is a single reservation holder.
• Exclusive Access - Registrants Only: Certain access (read, write) commands are
only allowed for registered hosts. There is a single reservation holder.
• Write Exclusive - All Registrants: Write commands are only allowed for registered
hosts. There is a single reservation holder.
• Exclusive Access - All Registrants: Certain access (read, write) commands are only
allowed for registered hosts. There is a single reservation holder.
• Undefined: The volume has no persistent reservations.