Computer Drive User Manual

heavily used controller, then a more distant drive will be selected.
Retry Mount Time Limit. The default value for this field is -1. When the default value (-1) is used, if an
error is encountered during a PVR mount operation, the mount will pend and be retried every 5 minutes.
Setting a value in this field will change the mount behavior to periodically retry the mount until the
specified time limit is exceeded. Once exceeded, an error is generated and the mount request is canceled.
If the mount request would have resulted in a write operation, the error returned will cause the Core
Server to set the VV Condition of the associated tape volume to DOWN. Once in DOWN state, the
volume will no longer be available for read or write operations. For further information about the Core
Server VV Condition, see Section 4.5.4.2: Core Server Tape Volume Information Window on page 271.
Drive Error Limit. This field is used in conjunction with the PVR Server Retry Mount Time Limit
field. If the number of consecutive mount errors which occur to any drive in this PVR equal or exceed
this value, the drive is automatically locked by the PVL. The only mount errors that apply are those set
through the Retry Mount Time Limit mechanism. The Drive Error Count field in the PVL Drive
Information records the number of consecutive errors on a drive by drive basis. To turn off the automatic
drive disable feature, set the Drive Error Limit to 0 or -1. Changing this value will not change drive
disable behavior until the PVL is recycled.
Command Device. The name of the device that the PVR can use to send commands to the robot. For
AIX systems, this is generally /dev/lmcp0. For Linux systems, use the symbolic library name defined in
/etc/ibmatl.conf. The environment variable HPSS_3494_COMMAND_DEVICE will override the
value entered in this field. Only use the environment variable when using only one 3494.
Async Device. The name of the device that the PVR can use to receive replies from the 3494 robot. For
AIX systems, this is generally /dev/lmcp1. For Linux systems, use the symbolic library name defined in
/etc/ibmatl.conf. For TTY and LAN-attached robots, the Async Device may be the same as the
Command Device. The environment variable HPSS_3494_ASYNC _DEVICE will override the value
entered in this field. Only use the environment variable when using only one 3494.
Dismount Delay. When Defer Dismounts is checked, this value is used by the PVL to determine the
number of minutes that dismounts are delayed after the last data access.
Shelf Tape Check-In Retry. The number of seconds the PVR will wait before asking the robot if a
requested shelf tape has been checked-in. The PVR will continue checking at this interval until the tape is
checked-in. This field applies only if the Support Shelf Tape checkbox is selected. The retry value must
be 30 or greater.
Shelf Tape Check-In Alarm. The PVR will periodically log alarm messages when a requested shelf tape
has not been checked-in. This field specifies the number of minutes between alarms. This field is only
active if the Support Shelf Tape checkbox is selected. The alarm value must be 2 or greater.
Characteristics. Flags for the PVR:
• Defer Dismounts. If ON, the PVL will delay the dismounting of a tape cartridge until the
drive is required by another job or until the Dismount Delay time limit is exceeded.
• Support Shelf Tape. If ON, the PVR and the PVL will support the removal of cartridges
from the tape library using the shelf_tape utility.
HPSS Management Guide November 2009
Release 7.3 (Revision 1.0) 137