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virtual tape library wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 history 2 see also 3 references toggle the table of contents virtual tape library 5 languages deutsch فارسی français 한국어 русский edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia data storage virtualization technology a virtual tape library vtl is a data storage virtualization technology used typically for backup and recovery purposes a vtl presents a storage component usually hard disk storage as tape libraries or tape drives for use with existing backup software virtualizing the disk storage as tape allows integration of vtls with existing backup software and existing backup and recovery processes and policies the benefits of such virtualization include storage consolidation and faster data restore processes for most mainframe data centers the storage capacity varies however protecting its business and mission critical data is always vital most current vtl solutions use sas or sata disk arrays as the primary storage component due to their relatively low cost the use of array enclosures increases the scalability of the solution by allowing the addition of more disk drives and enclosures to increase the storage capacity the shift to vtl also eliminates streaming problems that often impair efficiency in tape drives as disk technology does not rely on streaming and can write effectively regardless of data transfer speeds by backing up data to disks instead of tapes vtl often increases performance of both backup and recovery operations restore processes are found to be faster than backup regardless of implementations in some cases the data stored on the vtl s disk array is exported to other media such as physical tapes for disaster recovery purposes scheme called disk to disk to tape or d2d2t alternatively most contemporary backup software products introduced also direct usage of the file system storage especially network attached storage accessed through nfs and cifs protocols over ip networks not requiring a tape library emulation at all they also often offer a disk staging feature moving the data from disk to a physical tape for a long term storage while a virtual tape library is very fast the disk storage within is not designed to be removable and does not usually involve physically removable external disk drives to be used for data archiving in place of tape since the disk storage is always connected to power and data sources and is never physically electrically isolated it is vulnerable to potential damage and corruption due to nearby building or power grid lightning strikes history edit the first vtl solution was introduced by cybernetics in 1992 under the name hstc high speed tape cache 1 later ibm released a virtual tape server vts introduced in 1997 it was targeted for a mainframe market where many legacy applications tend to use a lot of very short tape volumes it used the escon interface and acted as a disk cache for the ibm 3494 tape library a competitive offering from storagetek acquired in 2005 by sun microsystems then subsequently by oracle corporation was known as virtual storage manager vsm which leveraged the market dominant stk powderhorn library as a back store each product line has been enhanced to support larger disk buffer capacities ficon and more recently c 2010 tapeless disk only environments other offerings in the mainframe space are also tapeless dlm has been developed by emc corporation while luminex has gained popularity and wide acceptance by teaming with data domain to provide the benefits of data deduplication behind its channel gateway platform with the consequent reduction in off site replication bandwidth afforded by deduplication it is possible and practical for this form of virtual tape to reduce recovery point objective time and recovery time objective to near zero or instantaneous outside of the mainframe environment tape drives and libraries mostly featured scsi likewise vtls were developed supporting popular scsi transport protocols such as spi legacy systems fibre channel and iscsi the falconstor vtl is the foundation of nearly half of the products sold in the vtl market according to an enterprise strategy group analyst 2 in mid 2010s vtls got a rebirth thanks to hi capacity archive drives from seagate and hgst and more popular tape in cloud and disk to disk to tape often in cloud scenarios 3 amazon and starwind software in partnership with veeam backblaze and wasabi technologies offer a so called gateway products that facilitates backing up and archiving on premises data as virtual tapes stored in aws microsoft azure wasabi technologies and backblaze public clouds 4 5 6 the idea is to provide a seamless integration of a backup applications incompatible with the apis object storages expose say at the time veeam couldn t do aws s3 and can t backup to the deep archive tier within azure still 7 see also edit backup tape library tape management system disk staging for an alternative approach emulation storage virtualization seven tiers of disaster recovery references edit history of vtl ibm infostor esg report on falconstor virtual tape library the rise fall and rise of virtual tape libraries integration of aws storage gateway with veeam backups and backup copy in cloud orgedelacruz uk retrieved 6 september 2017 setting up a veeam to starwind virtual tape library configuration mpecsinc com retrieved 3 march 2020 archive backups with veeam and starwind virtual tape library tech coffee net retrieved 20 april 2018 complete the backup lifecycle with veeam s sobr archive tier veeam retrieved 4 march 2021 v t e operating systems general comparison forensic engineering history list timeline usage share user features comparison variants disk operating system distributed operating system embedded operating system hobbyist operating system just enough operating system mobile operating system network operating system object oriented operating system real time operating system supercomputer operating system kernel architectures exokernel hybrid microkernel monolithic multikernel vkernel rump kernel unikernel components device driver loadable kernel module user space and kernel space process management concepts computer multitasking cooperative preemptive context switch interrupt ipc process process control block real time thread time sharing scheduling algorithms fixed priority preemptive multilevel feedback queue round robin shortest job next memory management resource protection bus error general protection fault memory paging memory protection protection ring segmentation fault virtual memory storage access file systems boot loader defragmentation device file file attribute inode journal partition virtual file system virtual tape library supporting concepts api computer network hal live cd live usb shell cli user interface pxe retrieved from https en wikipedia org w index php title virtual_tape_library oldid 1315968063 categories tape based computer storage backup hidden categories articles with short description short description matches wikidata this page was last edited on 9 october 2025 at 18 26 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree 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