User's Guide

Quantum Scalar Intelligent Libraries SCSI Reference Guide Guide 23
Note: When the library is reported on LUN 1 by a drive, then NAA port identifier information (type 3h) is not
reported by the media changer device and application clients should use the information reported by the
device at LUN 0. When the media changer device is reported on LUN 0 (i.e., NPIV is enabled in support of
control path failover configurations) then the drive hosting the library control path adds the NAA port
identifiers.
Media Changer Identification Descriptor
Media Changer logical units report only a single identifier. They will report the same identifier on either SCSI
or Fibre Channel.
Controller Identification Descriptors
On the SCSI interface the Controller logical unit will return the same identification descriptor as the Media
Changers, as shown in Table 15
.
On the Fibre Channel interface, the Controller logical unit will return three different identification descriptors
as shown in Table 16
, Table 17, and Table 19.
The first two descriptors describe the Node and Port.
Table 15 Media Changer Identification Descriptor
Bit
Byte
76543210
0 Protocol Identifier Code Set = 2h
1 PIV Rsvd Association = 0h Identifier Type= 1h
2 Reserved
3 Identifier Length = 20h (32)
4
:
11
Vendor Identification
(as reported in the Standard Inquiry response)
12
:
35
Serial Number
(as reported in the Unit Serial Number page without Vendor Identification prefix)
Table 16 Controller Node Identification Descriptor
Bit
Byte
76543210
0 Protocol Identifier Code Set = 1h
1 PIV Rsvd Association = 0h Identifier Type= 3h
2 Reserved
3 Identifier Length = 08h
4
:
11
Node Worldwide Name