ATTO Technology 2100R, 2200R/D, 3200R manual Target Descriptors, Segment Descriptors

ATTO Technology, Inc. ATTO FibreBridge Installation & Operation Manual

The Extended Copy command contains target and segment descriptors that are used to define which data is to be moved between which devices. With Serverless backup, the server sends a single Extended Copy command to the FibreBridge. The bridge then interprets the segment descriptors and issues read commands to the appropriate devices. Once enough data is read, the bridge will issue write commands to the appropriate device. Once all of the segment descriptors have been executed, the bridge will send status to the copy agent running in the server. In this way, the data never passes into the server. Thus freeing the CPU and Memory to process other requests.

Target Descriptors

Target Descriptors allow the host to describe the devices to be involved in the Extended Copy. In order to be compatible with all of the Copy Agent Application packages, the FibreBridge implementation supports World Wide Name, N_Port ID, and WWN plus N_Port ID descriptor types.

Segment Descriptors

Segment Descriptors describe the data to copy and how much of it. The two most common types of Target Descriptors are “block (disk) to stream (tape)” and “stream (tape) to block (drive)”. The FibreBridge also supports “block to block”, “inline to stream” and “stream to discard” descriptors.

General Operation of Serverless Backup

Serverless Backup is available in the following models of the FibreBridge at no extra charge:

∙FibreBridge 3200R

∙FibreBridge 2200R/D

The FibreBridge will execute Extended Copy to and from SCSI disk and tape drives connected directly to the FibreBridge as well as from Fibre Channel disk drives. The hard drives that you are backing up or restoring to can be anywhere on the Storage Area Network, including SCSI drives attached to the bridge.

Note that the FibreBridge will support up to 830 MBytes of data to be copied in a single Extended Copy command. Larger files must be backed up or restored using additional operations. The bridge can support up to two simultaneous Extended Copy commands.

Please check the ATTO Technology, Inc. web site at www.attotech.com for a complete list of all of the applications supported as well as detailed installation and configuration tips.

Enabling Serverless Backup on the FibreBridge

The following steps are necessary to enabled Serverless Backup on the FibreBridge.

1)Access the FibreBridge either through RS 232 or Ethernet(see previous chapter for details).

2)After Ready prompt, type set Fcinitiator enabled.

3)At next Ready prompt, type saveconfiguration restart.

4)The FibreBridge is now ready for Serverless Backup.

ATTO Technology, Inc.

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