By using this site, you agree to the Terms of Use and Privacy Policy. 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. The VTAPE command or statement is used to associate a tape device with a file containing a tape image. Retrieved from " https: Restore processes are found to be faster than backup regardless of implementations. 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. This is a way to keep part of an organization's "tape" inventory on disk. 
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DLm vgape 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. This is a way to keep part of an organization's "tape" inventory on disk.
Virtual tape library
What is the purpose of it? Outside ftape the mainframe environment, tape drives and libraries mostly featured SCSI. This page was last edited on 7 Mayat IP address parts in standard dotted decimal notation can be decimal, hexadecimal, or octal.
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. At mine, we use "TAPEC" for cartidges, but the volume serial determines vtapr a physical tape or a virtual tape.
Virtualizing the disk storage as tape allows integration of VTLs with existing backup software and existing backup and recovery processes and policies.
VTAPE can be used to install optional products or apply PTFs from a file containing such a tape ftape, instead of installing from a physical tape. For most mainframe data centers, the storage capacity varies, however protecting its business and mission critical data is always vital. Tue Feb 06, Tape-based computer storage Backup. Hi chtrisa - the posted link gets a error Quote: IEFI - Unit field specifies incorr Both are cataloged and function identically in the JCL.
The filename information is concatenated in storage. Therefore, filename must be enclosed in quotation marks. Alternatively, most contemporary backup software products introduced also direct usage of the file system storage especially network-attached storageaccessed through NFS and CIFS protocols over IP networks not requiring a tape library emulation at all.
This occurs because Windows does not recognize the path as an absolute path if "backward-slashes" are converted into incorrect characters. The benefits of such virtualization include storage consolidation and faster data restore processes.
A tape file on a stacking tape. A virtual tape library VTL is a data storage virtualization technology used typically for backup and recovery purposes. The following example is equivalent to the preceding example: A number without a leading 0 implies decimal. A obm mark within filename must be coded as two single quotation marks, for example: It was targeted for a mainframe market, where many legacy applications tend to use a lot of very short tape volumes.
IBM MAINFRAME: What does VTAPE mean in unit=Vtape
As a result, the tape image is created in the installation directory of the Virtual Tape Server. 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. Views Read Edit View history.
A leading 0x implies hexadecimal, a leading 0 implies octal. One choice would be to redo all of the jcl, but that is often too costly to do. Again, as they do where Lance is - the pools should have unique and easily identified series of volsers. The physical tapes and the virtual tapes have separate tape vvtape.
As Lance pointed out, they use TAPEC - the tape management system along with the virtual tape system know which pool of "tapes" to use. Host names can have up to characters. Tue Feb 06, 9:
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