Table 4-56. Block Descriptor; Table 4-57. Mode Select Parameter Header Field Description - Fujitsu M2488 Product Manual

M2488 PRODUCT GUIDE
Block Descriptor:
The block descriptor specifies the medium characteristics for all of a logical unit. The block
descriptor contains a density code of 00h or 09h (default), a number of blocks, and a block length.
BYTES 7
0
1-3
4
5-7

Table 4-57. MODE SELECT Parameter Header Field Description

BYTE BIT VALUE
0 0-7
1-3
5-7
Page Descriptor:
BYTES 7
0 PS
1
2 - N
April 1997

Table 4-56. Block Descriptor

BITS
6 5 4
Density Code = 09h
Number of Blocks = 000000h
Reserved
Block Length
00h, 09h Density codes of 00h and 09h (default) create tapes in the format described
by ANSI standard X3B5/94-043.
Density Code 28h is described in CHAPTER 5.
000000h The number of blocks field is always set to zero, indicating that any
remaining logical blocks of the logical unit have the medium characteris-
tics specified by the block descriptor.
00h The block length specifies the length in bytes of each logical block
described by the block descriptor. A block length of zero indicates the
length is variable.
Table 4-58. Page Descriptors
6 5 4
Reserved
Additional Page Length
Page Defined or Vendor Unique Parameter Bytes
CG00000-011503 REV. A
TAPE UNIT SCSI COMMANDS
3 2 1
DESCRIPTION
BITS
3 2 1
Page Code
DEFAULT
0
09h
000000h
00h
00h
0
4-59