Release Note для Spectra Logic spectra t120

LTO Tape Drives

December 2008

Spectra T950 Library

The IBM LTO-4 Fibre Channel drives currently shipping with the library 
are equipped two Fibre Channel ports. To enable and use the dual ports:
ƒ Your library must be using BlueScale10.4.0 or later firmware.
ƒ The LTO-4 Fibre Channel drives must be using firmware version 82F9 

or later (see 

). 

ƒ If an LTO-4 Fibre Channel drive is connected to a SAN using WWPN-

based zoning or to an HBA using WWPN-based persistent binding, you 
may also need to update your SAN or HBA configuration to include 
Port B, as described in 

Although the two ports on an LTO-4 Fibre Channel drive cannot be used 
simultaneously, they can be used to provide failover capability in the event 
that communication to the port currently in use is interrupted. This 
failover can be can be accomplished several ways, including:
ƒ Manually disconnect the fiber optic cable from the failed port and 

connect it to the other port. You may need to reconfigure your host 
software to recognize the alternate port.

World Wide Port 
Name (WWPN)

The WWPN generated by BlueScale 10.4 or later uses the form 
2n:yw:00:90:A5:00

:xx:xx, where:

n = the frame number for Port A

= the frame number + 1 for Port B

y =the DBA number
w =the drive number in the DBA (1 – 4)
xx:xx = the frame id, where each x is a hexadecimal

number from 0 – F.

Change the WWPN for the ports on each drive, as follows:
ƒ For an LTO-4 Fibre Channel drive with only one port or for Port A on a 

, change the sixth pair of hexadecimal numbers in the 

WWPN to 00. (This number was previously Y0, where Y is a hexadecimal 
number from 1 – F. For example, change 21:11:00:90:A5:40:xx:xx to 
21:11:00:90:A5:00:xx:xx

ƒ If your LTO-4 drive has dual Fibre Channel ports, set the value for Port B 

by copying the value for Port A and changing the value of the second digit in 
the first pair of hexadecimal numbers from 1 to 2.

For example:
WWPN for Port A = 21:11:00:90:A5:00:xx:xx
WWPN for Port B = 22:11:00:90:A5:00:xx:xx