About Nasb - HP Cisco MDS 9216 - Fabric Switch Configuration Manual

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
Manages disks as well as one or more tape backup devices.
•
Contacts the client devices to retrieve the list of logical blocks that need to be backed up.
•
Performs data movement from disk to tape media based on the logical block list provided by the
•
client device.
The backup application in the client device maps the data to be backed up and creates the logical block
list associated with the data. The movement of data from the physical disks to the backup device (tape)
is not performed by the client device. This reduces substantial load on the client device.
Note The media server, disk, and tape can be located anywhere in the fabric.
An example configuration is shown in
the storage disks and the tape devices during backups.
Figure 58-3
Read
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
Cisco MDS 9000 Family CLI Configuration Guide
58-4
Example Configuration with Media Server as Data Mover
Media
server
Logical block
list
SAN
Write
Figure 58-4.
Figure 58-3. The media server moves the data directly between
Client
(Application server)
Tape library
Chapter 58 Configuring NASB
OL-16184-01, Cisco MDS SAN-OS Release 3.x