Chapter 6 HPSS Configuration308 September 2002 HPSS Installation GuideRelease 4.5, Revision 2Table 6-11 Storage Class Configuration VariablesDisplay Field Name Description Acceptable Values DefaultValueStorage Class ID A unique numeric IDassociated with thisstorage class.Any non-zero, positive 32-bitinteger value.Lastconfigured IDplus 1.Storage Class Name A text string used todescribe this storage class.Any character string up to 31 bytesin length.Storage ClassIDAdvice: Choose a Storage Class Name that describes the function of the storage class.Good examples are 4-Way striped 3490 or Non-Striped SCSI Disk.Storage Class Type An indicator of whetherthe media to be associatedwith this storage class aretapes or disks.This field is set with the Tape/Disktoggle buttons and cannototherwise be modified.Tape or Diskbased on thetoggle optionselected.Migration Policy The name of the migrationpolicy associated with thisstorage class, if data is tobe migrated from thisstorage class.Any configured migration policyname from the pop-up list. May beleft blank if migration is not desiredfor this storage class.Blank.Advice: Do not configure a migration policy for a storage class at the lowest level ina hierarchy. Adding a migration policy after files are created in a storage class canresult in those files never being migrated.Purge Policy The name of the purgepolicy associated with thisstorage class, if data is tobe purged from thisstorage class. This field isonly applicable to diskstorage classes.Any configured purge policy namefrom the pop-up list. May be leftblank if purge is not desired for thisstorage class.Blank.Advice: Do not configure a purge policy for a tape storage class or a storage classwhich does not support migration.Media Type The type of mediacomprising this storageclass.Any valid media type from the pop-up list.Default Tapeor DefaultDisk based onStorage ClassType.Media Block Size The size of a data block onthe physical volume inbytes.Any positive 32-bit integer value. Based onselectedMedia Type.Advice: The block size should be set to a value appropriate for the volume type. SeeSection 2.9.1.1 for more details.
