Hub/Switch Installation Guide

Chapter 6 HPSS Configuration
HPSS Installation Guide September 2002 401
Release 4.5, Revision 2
6.9 Configure MVR Devices and PVL Drives
TheMVRDevice andPVLDrive objectsrefertothe same physicaldrive, but aremaintainedintwo
separate SFS files based on what information is required by the PVL for drive management and
whatinformationis requiredby the Moverfordevicemanagement. Thetwo SFSfilesare managed
by SSM from the same configuration window so that they can be synchronized with one another.
Alltapedevicesthat willbe used forHPSSdata mustbe set tohandlevariableblock 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.
Storage Segments The name of the SFS file
that contains the storage
segment metadata.
Valid SFS file name. The file must
not be shared with other Storage
Servers.
/.:/encina/sfs/
hpss/
storagesegdis
k.# for Disk
SS
/.:/encina/sfs/
hpss/
storagesegtap
e.# for Tape
SS
Advice: Use a name that is meaningful to the type of SS and metadata being stored.
Table 6-32 Storage Server Configuration Variables (Continued)
Display Field Name Description Acceptable Values
Default
Value