Log Page X'30': Library Device Attributes

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Table 1 shows the data that is returned for the Library Attributes Page of the tape library.
Table 1. Data returned for Log Sense Page X'30'
Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 Reserved Page Code
1 Reserved
2–3 Page Length (n - 3)
Log Parameters (see Log Parameter Format)
4
x + 3		 Log Parameter (first)
Length = x
:
n - y + 3
n		 Log Parameter (last)
Length = y

Log parameter format

Each log parameter begins with a 4-byte parameter header, followed by 1 or more bytes of parameter data. Table 2 shows the log parameter format.
Table 2. Log parameter format
Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0–1 Parameter Code
2 DU
(B'0') 		DS
(B'1') 		TSD
(B'0')		 ETC
(B'0')		 TMC
(B'0')		 Reserved LP
(B'1')
3 Parameter Length (n - 3)
4
n		 Parameter Value

Log Parameter Byte 2-Control Byte

A Log Parameter Control Byte is returned for each parameter code that is described in the log pages. The Log Parameter Control Byte is described here one time only. Any parameters that use a different Log Parameter Control Byte have that byte described within that parameter.

Note: The contents of this byte are constant; the user cannot set these values. This byte is part of the returned data that is described in the SCSI standard; it is described in the following list:
Bit Description
7 DU (Disable Update): B'0'
6 DS (Disable Save): B'1'
5 TSD (Target Save Disable): B'0'
4 ETC (Enable Threshold Comparison): B'0'
3–2 TMC (Threshold Met Comparison): B'00'
1 Reserved
0 LP (List Parameter): B'1' (Indicates a list parameter)

Parameter definitions

Table 3 lists the parameter codes for Log Page X'30'.
Note: All ASCII parameters are left justified padded with X'00'.
Table 3. Log Page X'30' parameter codes
Code Description Type Size
X'0001' Number of Frames in Library String Binary 1
X'0002' Library Web Page URL ASCII 255
X'0003' Logical Library Name ASCII 32
X'0004' Physical Library Serial Number ASCII 12
X'0005' Library Hardware Version Binary 1
  • X'0003' – Logical Library Name: Indicates the length of the logical library name, where:

    Length = 16 bytes for all TS3500 libraries and TS4500 libraries with firmware versions below 1.3.0.0.
    Length = 32 bytes for TS4500 libraries at firmware version 1.3.0.0 and above.

  • X'0005' – Library Hardware Version: Indicates if the library is a TS3500 or TS4500, where:

    X'00' or parameter not present = TS3500
    X'01' = TS4500

    This parameter code is supported on TS4500 libraries at firmware version 1.3.0.0 and above. Therefore the library firmware will need to be at this version or higher to identify the library as a TS4500 using this parameter.