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About NASB
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .
The media server, disk, and tape can be located anywhere in the fabric.
Note
An example configuration is shown in
the storage disks and the tape devices during backups.
Figure 41-1
Storage (disks)
When the NASB is the data mover, it moves the data between the disks and the tapes. The NASB device
is a SCSI target device capable of handling SCSI Extended Copy (XCOPY) commands as well as a SCSI
initiator device capable of issuing READ/WRITE commands to disks and other backup media, such as
tapes. See
Figure 41-2
SCSI Extended Copy
(XCOPY) commands
The task of managing and preparing the source and destination targets is performed by the media server.
For example, if the destination is a tape library, the media server issues commands to load and unload
the correct tape and position of the tape write head at the correct offset within the tape.
Cisco MDS 9000 Family Configuration Guide
41-2
Example Configuration with Media Server as Data Mover
Media
server
Logical block
list
SAN
Read
Figure
41-2.
Example Configuration with NASB Device as Data Mover
Media
server
Logical block
Network-Accelerated
Serverless Backup
(NASB) device
Read
Storage (disks)
Figure
41-1. The media server moves the data directly between
Client
(Application server)
Write
Tape library
Client
(Application server)
list
SAN
Write
Tape library
Chapter 41
Configuring NASB
OL-6973-03, Cisco MDS SAN-OS Release 2.x
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