The DR Series system supports the following virtual tape library (VTL) tape access protocols.
The DR Series system VTL container type is designed to work seamlessly with the NDMP protocol.
iSCSI or Internet Small Computer System Interface is an Internet Protocol (IP)-based storage networking standard for storage subsystems. It is a carrier protocol for SCSI. SCSI commands are sent over IP networks by using iSCSI. It also facilitates data transfers over intranets and to manage storage over long distances. iSCSI can be used to transmit data over LANs or WANs.
In iSCSI, clients are called initiators and SCSI storage devices are targets. The protocol allows an initiator to send SCSI commands (CDBs) to the targets on remote servers. It is a storage area network (SAN) protocol, allowing organizations to consolidate storage into data center storage arrays while providing hosts (such as database and web servers) with the illusion of locally attached disks. Unlike traditional Fibre Channel, which requires different cabling, iSCSI can be run over long distances using existing network infrastructure.
This topic describes key specifications of VTL support in the DR Series system.
NOTE: Refer to the documentation for your specific DR Series system, which includes DMA best practices whitepapers and the latest Dell DR Series Interoperability Guide, for a complete list of the supported DMAs. Visit the following site and select your specific DR Series system to download documentation: http://www.dell.com/powervaultmanuals. |
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Use of VTL with Virtual DR Series system (DR2000v) — The use of VTL is not supported on the DR2000v. |
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Number of Tape Drives — Each tape library contains 10 tape drives of the type IBM-LTO-4 (‘ULT3580-TD4’) |
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Tapes or Media Sizes— Each library initially is created with 10 slots housing 10 tape media of the default size of 800GiB, which is the equivalent of an LTO4 tape. |
vtl --update_carts –-name <name> –-add --no_of_tapes <number>
Tapes of the following capacity are supported:
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Maximum Number of DMAs or Initiators Supported — A tape library can be accessed by one DMA or iSCSI initiator at a time. |
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Replication — Replication of VTL containers is currently not supported; however, it is planned for a future release of the DR Series system. |
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