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Table 6-32 Storage Server Configuration Variables (Continued)
Display Field Name
Storage Segments
6.9 Configure MVR Devices and PVL Drives
The MVR Device and PVL Drive objects refer to the same physical drive, but are maintained in two
separate SFS files based on what information is required by the PVL for drive management and
what information is required by the Mover for device management. The two SFS files are managed
by SSM from the same configuration window so that they can be synchronized with one another.
All tape devices that will be used for HPSS data must be set to handle variable block sizes (to allow
for the ANSI standard 80-byte volume label and file section headers).
Before adding, deleting or modifying MVR Device and PVL Drive configuration, HPSS requires
that the PVL and related the Mover be shutdown to ensure consistency. If a tape drive is being
modified, then the corresponding PVR must also be shutdown. SSM will enforce this restriction.
To set the devices to use variable blocks on an AIX platform, use either the chdev command
(substituting the appropriate device name for rmt0):
% chdev -l rmt0 -a block_size=0
or smitty:
% smitty tape
<select "Change / Show Characteristics of a Tape Drive">
<select the appropriate tape device>
<change "BLOCK size (0=variable length)" to "0">
<enter>
For Solaris, the method used to enable variable block sizes for a tape device is dependent on the
type of driver used. Consult the tape device driver documentation for instructions on installation
and configuration.
HPSS Installation Guide
Release 4.5, Revision 2
Description
The name of the SFS file
that contains the storage
segment metadata.
Advice: Use a name that is meaningful to the type of SS and metadata being stored.
September 2002
Chapter 6
Acceptable Values
Valid SFS file name. The file must
not be shared with other Storage
Servers.
HPSS Configuration
Default
Value
/.:/encina/sfs/
hpss/
storagesegdis
k.# for Disk
SS
/.:/encina/sfs/
hpss/
storagesegtap
e.# for Tape
SS
401
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