- Sun Storage Virtual Tape Library VTL User Guide

Managing tape caching
120 VTL User Guide • May 2008 G • 96267
Managingtapecaching
Inmostcircumstances,theAutomatedTapeCachingfeaturemaintainstapecaches
andlinkagesautomatically,providedthatpoliciesaresuitablydefined.However,
whennecessary,youcanmanagecachingmanually.Thissectionexplains:
■ “Forcingmigr ationtophysicaltape ”onpage 120
■ “Manuallyfre eingcachespace”onpage 120
■ “Renewingcacheforadirectlylinkedtape”onpage 120
■ “Relinkingph y si cal tapes”onpage 1 21
▼ Forcingmigration to physicaltape
Tomanuallycausedata ina cachetobemigratedto physicaltape, proceedas
follows:
1. IntheobjecttreeoftheVTLconsole,right‐clickonavirtualtapecache.
2. SelectMigrate to Physical Tapefromthecontextmenu.
Notethatalldataon thephysicaltapeisoverwritten.
Stophere.
▼ Manuallyfreeing cache space
1. Ifyouneedtoreleasespaceinasinglecache,intheobjecttreeoftheVTL
console,right‐clickonavirtualtapeca c he , andselectReclaim Disk Space.
Notethatalldatainthecacheisoverwritten.
2. Toreleasespace inmultipletapecaches,intheobjecttreeofth eVTL
console,
right‐clickontheVirtual Tape Library Systemnode,andselectReclaim
Disk Spacefr omthecontextmenu.
Stophere.
▼ Renewingcachefor adirectlylinkedtape
VTLsoftwareautomaticallyrecachesadirectlinkphy si cal tapeifthelinkis
overwrittenbyabackupapplication.To manuallyrenewthecacheforadirectlink
tape,proceedasfollows: