- Sun Storage Virtual Tape Library VTL User Guide

Features
2 VTL User Guide • May 2008 G • 96267
Features
TheSunStorageTekVTLsolutionhasthefollowingfeatures:
■ Emulationofmostwidelyusedtapelibra rie s, drives,andmedia types,including
thelatestSunStorageTekT10000‐seriesdrivesan d media
■ Dynamicallocationofdiskcapacity
VTLsoftwarecanallocatediskspacetovirtualtapesin5‐GBincrements, upto
thefull,ratedcapacityoftheemulated media.Thisminimizeswastedspace,
providesnaturalloadbalancing,andoptimizestheperformanceofthediskarray.
■ AutoArchivefeature
TheAuto Archiveoptionwritesdatatoph ys i c altapewheneverabackup
applica ti o norutilitymovesavirtualtapefromavirtuallibrarytoan
import/exportslot.Thephys i cal tapelibrarymustsupportbarcodes:the VTL
softwarehastofindamatchingbarcodeinthephysicallibraryin
ordertoexport
avirtualtapetoaphysicalcartrid ge. 
■ ReplicationoftapestolocalandremoteVTLsystems
VTLsoftwaresupportsmanualcopyingandbothevent‐andpolicy‐driven
automaticreplicationmethods.
■ AutomatedTapeCachingoption
Withtheoptionaltape‐cachingfeature,VTLsoftwarecanautomaticallysavea
singlevirtualvolumewithasinglebarcodeintwophysical forms,oneondisk
andoneonphysicaltape .Thetape‐cachingfeaturemanagesretentionand
migrationofthephy si c al images,underthecontrolof
user‐specifiedpoliciesand
schedules.Thisletsuserskeepspaceinthediskcachefreefornewbackupsets
whilere tain ing thetapeimagesofoldervirtualvolumes.Whenavirtualvolume
nolongerresidesinthediskcache,apointerinthecacheseamlesslyredirects 
requeststothetapeimage.

■ Highavailabilityoption
Anoptional,hi gh ‐availabilityconfigurationprovidesintelligentfailover,with
duplicate,self‐monitoringVTLservernodesandredundant,primaryandst andby 
pathsbetweenbackupapplication sand VT Ldata.
■ Encryptionandsecuredatade struct ion
Toensurethatthedatathatyouexporttophysi cal tapeisconfidentialandse cu re,
VTLoffersaSecureTapeOptionthatusestheAdvancedEncryptionStandard
(AES)algorithmpublishedbytheNationalInstituteofSt an dards andTechnology,
anagencyoftheU.S.government.