Computer Drive User Manual

device. Without the reservation, it is possible for other hosts to interleave SCSI commands to the
drive with those issued by HPSS. This effect could potentially lead to corruption of data.
Table 2. Recommended Settings for Tape Devices
Device Driver Mover Executable NO-DELAY
Support
Locate Support Write TM(0) to
Sync
IBM SCSI Tape hpss_mvr_ssd ON ON OFF
IRIX Native hpss_mvr_tcp ON ON OFF
Ampex hpss_mvr_dd2 OFF ON ON
AIX Native hpss_mvr_tcp ON OFF OFF
Linux Native hpss_mvr_tcp ON ON OFF
PVR (tape only). The name of the PVR that handles the removable media operations for the drive.
Drive Address. For tape drives, this is the name/address by which the PVR can access the drive. This
field isn't used by the PVL or PVR for disk drives; the administrator may use this as a comment. Many
sites duplicate the Device Name which makes it valuable as a query of drive information since it will
return the device information for the disk case (e.g. lshpss -drv).
Advice - For StorageTek robots: Drive Address configuration entries correspond to the
ACS,Unit,Panel,Drive Number used by ACSLS to identify drives. For example, the first drive in a typical
configuration has Drive Address 0,0,10,0.
For IBM 3584 LTO robots: The Drive Address configuration entries correspond to the SCSI address
(location) of the drive in the library. Determine the drive location by running an inventory on the library
either through the tapeutil utility supplied with the Atape driver or using the library console. Typically
the first drive is located at location 257 for a single frame library.
For IBM 3494 robots: The Drive Address configuration entries correspond to the hexadecimal Library
device number of the drive. Determine the Library device number by running the command
“/opt/hpss/bin/GetESANumbers /dev/rmtX” for each tape drive in the robot.
For SCSI PVRs: The Drive Address configuration entries correspond to the SCSI address (location) of
the drive in the library. Determine the drive location by running an inventory on the library either
through the device_scan utility or using the library console. Typically the first drive is located at
location 256 for a single frame library.
For operator mounted drives: For manually mounted drives, the drive address string is displayed to
operators when an explicit drive is selected for mounting. The drive address should therefore be a string
that easily communicates to an operator the drive in question (i.e., a name matching the label on the
exterior of the drive).
For AML robots: Leave the Drive Address field blank.
The AML PVR is supported by special bid only.
Controller ID. An indication of the adapter/bus that is in the data path to the device.
Advice - This field is used to attempt to mount individual volumes of a set of striped media on individual
controllers, when possible, to prevent contention on the data path. It is recommended that the drives that
are on the same adapter/bus have the same Controller ID. For drives in 3494 robots, the Controller ID
HPSS Management Guide November 2009
Release 7.3 (Revision 1.0) 201