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Chapter 4 SCSI Commands
MODE SELECT (6) / (10) Command (15h / 55h)
DLT-S4 Interface Reference Guide
105
Read / Write Error
Recovery Page (01h)
4
The Read / Write Error Recovery Page controls the drive’s response to
error conditions that arise during the course of
READ
and
WRITE
command processing.
Figure 57 Read / Write Error
Recovery
MODE SELECT
Page — Data Format
7Fh
No change from previous density (no Operation)
Number of
Blocks
Must be set to 0, indicating that all of the remaining logical blocks on the tape have
the medium characteristics specified by this block descriptor.
Block Length
Specifies the length, in bytes, of each logical block transferred. A block length of 0
indicates that the length is variable (specified in the I/O command). Any value other
than 0 indicates the number of bytes per block to use for
READ
,
WRITE
, and
VERIFY
commands that specify a Fixed bit of 1 (i.e., Fixed Block Mode), which also causes the
transfer length in the CDB to be defined as a block count. If the Fixed bit is not set to
1, the drive ignores this field. The value in this field must be a multiple of 4.
1.
The Density Code must match a supported density of the tape cartridge currently mounted in the DLT-S4 tape
drive.
Bit
Byte
7
6
5
4
3
2
1
0
0
PS (0)
SPF (0)
Page Code (01h)
1
Page Length (0Ah)
2
Reserved
TB (0)
Reserved
EER (1)
PER
DTE (0)
DCR (0)
3
Read Retry Count
4 — 7
Reserved
8
Write Retry Count
9 — 11
Reserved
Field
Description