Scsi Tape Read/Write Assignment - HP Cisco MDS 9020 - Fabric Switch Configuration Manual

Chapter 41 Configuring the SAN Extension Tuner
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
Command
Step 5
switch(san-ext-nport)# transfer-ready-size
512000
switch(san-ext-nport)# no transfer-ready-size
512000
Step 6
switch(san-ext-nport)# stop command-id 100
Step 7
switch(san-ext-nport)# end
switch#

SCSI Tape Read/Write Assignment

You can assign SCSI tape read and write commands on a one-time basis or on a continuous basis.
There is only one outstanding I/O at a time to the virtual N-port that emulates the tape behavior.
Note
To assign SCSI tape read and or write commands on a one-time basis, follow these steps:
Command
Step 1
switch# san-ext-tuner
switch(san-ext)#
Step 2
switch(san-ext)# nWWN 10:00:00:00:00:00:00:00
Step 3
switch(san-ext)# nport pWWN
12:00:00:00:00:00:00:56 vsan 200 interface
gigabitethernet 3/4
switch(san-ext-nport)#
Step 4
switch(san-ext-nport)# tape-read command-id 100
target 22:22:22:22:22:22:22:22 transfer-size
512000 num-transactions 5000000
filemark-frequency 32
Step 5
switch(san-ext-nport)# tape-write command-id 101
target 22:22:22:22:22:22:22:22 transfer-size
512000 num-transactions 5000000
filemark-frequency 32
Step 6
switch(san-ext-nport)# stop command-id 100
switch(san-ext-nport)# stop all
Step 7
switch(san-ext-nport)# clear counters
Step 8
switch(san-ext-nport)# end
switch#
OL-16184-01, Cisco MDS SAN-OS Release 3.x
Configuring the SAN Extension Tuner
Purpose
Specifies the maximum transfer ready size of
512,000 bytes as a target for SCSI write
commands. For a SCSI write command with
a larger size, the target performs multiple
transfers based on the specified transfer size.
Removes the specified transfer ready size
configuration for SCSI write commands.
Stops the command with the specified ID.
Exits the SAN extension tuner submode.
Purpose
Enters the SET configuration submode.
Configures the nWWN for the SAN
extension tuner.
Creates a virtual N port on the specified
Gigabit Ethernet port and VSAN. This N port
can act as an initiator or a target.
Specifies a transfer size of 512,000 bytes
with space over the filemark every 32 SCSI
read commands. The total number of I/Os is
5,000,000 bytes.
Specifies a transfer size of 512,000 bytes
with filemarks written every 32 SCSI write
commands. The total number of I/Os is
5,000,000 bytes.
Stops the command with the specified ID.
Stops all outstanding commands.
Clears the counters associated with this N
port.
Exits the SAN extension tuner submode.
Cisco MDS 9000 Family CLI Configuration Guide
41-7