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Chapter 6 HPSS Configuration
308 September 2002 HPSS Installation Guide
Release 4.5, Revision 2
Table 6-11 Storage Class Configuration Variables
Display Field Name Description Acceptable Values
Default
Value
Storage Class ID A unique numeric ID
associated with this
storage class.
Any non-zero, positive 32-bit
integer value.
Last
configured ID
plus 1.
Storage Class Name A text string used to
describe this storage class.
Any character string up to 31 bytes
in length.
Storage Class
ID
Advice: Choose a Storage Class Name thatdescribes the function of thestorage class.
Good examples are 4-Way striped 3490 or Non-Striped SCSI Disk.
Storage Class Type An indicator of whether
the media to be associated
with this storage class are
tapes or disks.
This field is set with the Tape/Disk
toggle buttons and cannot
otherwise be modified.
Tape or Disk
based on the
toggle option
selected.
Migration Policy The name of the migration
policy associated with this
storage class, if data is to
be migrated from this
storage class.
Any configured migration policy
name from the pop-up list. May be
left blank if migration is not desired
for this storage class.
Blank.
Advice: Do not configure a migration policy for a storage class at the lowest level in
a hierarchy. Adding a migration policy after files are created in a storage class can
result in those files never being migrated.
Purge Policy The name of the purge
policy associated with this
storage class, if data is to
be purged from this
storage class. This field is
only applicable to disk
storage classes.
Any configured purge policy name
from the pop-up list. May be left
blank if purge is not desired for this
storage class.
Blank.
Advice: Do not configure a purge policy for a tape storage class or a storage class
which does not support migration.
Media Type The type of media
comprising this storage
class.
Any valid media type from the pop-
up list.
Default Tape
or Default
Disk based on
Storage Class
Type.
Media Block Size The size of a data block on
the physical volume in
bytes.
Any positive 32-bit integer value. Based on
selected
Media Type.
Advice: The block size should be set to a value appropriate for the volume type. See
Section 2.9.1.1 for more details.