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Valid Errors:
Error
Error Code
All Read Operation Errors
6.27
SET LIMITS
(33 H )
BIT
BYTE
7
6
5 4 3
2
I
0
-----1------1------1------1------1------1------1-------
o
0
I
I
0
0
I
1
01
Logical unit Nbr
Reserved
IRd InhlWr Inh
02
(MSB)
Logical Block Address
-
- -
-
- -
-
-
-
- - -
-
-
- -
-
-
- -
-
-
03
Logical Block Address
-
-
-
- - - - -
-
-
- -
- - - - - - - - -
-
-
-
04
Logical Block Address
-
- -
-
-
- -
- - -
-
-
-
-
-
- -
-
-
- -
-
- -
05
Logical Block Address
(LSB)
06
Reserved
07
(MSB)
Number of Blocks
08
Number of Blocks
(LSB)
09
Reserved
1
Flag
I
Link
Figure 6-44.
SET LIMITS Command
This command defines a logical block address outside of which all
following linked commands may not operate and can be used to
inhibit any subsequent linked reads or writes.
A second SET
LIMITS command may not be linked to a chain of commands in which
a SET LIMITS command has already been issued.
Bits 0 and
1 of By te 01 define the legal operations within the
limits of
the specified addresses.
Bit
0
indicates
WRITE
INHIBIT, and Bit
1
indicates READ INHIBIT.
When the Number of Blocks field (Bytes 07 to 08) is zero, the
limits shall extend from the Logical Block Address (Bytes 02 to
05) to the last block on the unit.
A non-zero value should not
extend beyond the last block on the drive or an Illegal Block
Address (2l H ) error code will be post ed.
500504-00
6-60
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