Physical Configuration Page Definition - Sun Microsystems storagetek sl500 Reference Manual

Physical Configuration Page Definition

TABLE 6-55
command. This Mode Sense command enables the library to report a physical
description of the library configuration.
This table provides an example of the information contained in each 5-byte group:
Byte
6
7
8
9
10
Notes:
1. CAP = Cartridge Access Port
2. PTP = Pass-thru Port
3. Each group indicates the column #, module #, a bit map of drives, CAP cells,
PTP cells, reserved cells and storage cells for the indicated library column and
module.
The example above—Bytes 6 to 10—show numbers for column 1, module 1
and would break down as follows:
The bit map for drives specifies which row of this module and column
contains a drive.
Bit 0 specifies row 1
■
Bit 1 specifies row 2
■
Bit 2 specifies row 3
■
Bit 3 specifies row 4
■
A 1 in the bit position signifies the drive is present,
■
A 0 zero signifies no drive at this location.
The list in
combinations. For instance, depending on the module type, the last row or rows, in
the last module of the library, are not accessible. Only the accessible cells are listed
in the number of the cells for that specific module and column. The physical
module types do not account for customer configured options.
There are customer configured options, such as restricting the total cell count,
changing caps to cells, and setting aside reserved cells. These options are reflected
in the cell counts for the columns and modules.
To count physical rows of a cell type using the above information, always add
storage cell rows last in a column. Generally a column within a module only has
one cell type.
Two exceptions for this are the base unit CAP column (column number 8) which
has CAP cells and storage cells below it. The base unit also has an area for reserved
cells in column 1. If reserved cells are configured, they will come first in the row
numbering.
96122 • Revision: F
defines the Physical Configuration page of the Mode Sense (10)
Bit map of drives for column 1, module 1
Number of CAP cells for column 1, module 1
Number of PTP cells for column 1, module 1
Number of reserved cells for column 1, module 1
Number of storage cells for column 1, module 1
TABLE 6-55 describes the possible modules and physically accessible cell
Bit
Chapter 6 SCSI Commands 157
Mode Sense (10)