Figure 3.22 Set Limits Command: Specifying The Range Where Access Is Permitted - Fujitsu MAX3073NC - SCSI,80, Dell DC961,Hard Drive Scsi Logical Interface Specifications

Also, the size of the range where access is permitted, specified in this command in the "Block count"
field in the CDB, specifies the number of logical data blocks from that starting point. However, when
zero is specified in the "Block count" field, access to the final logical data block of the specified data
space (User Space or CE Space), with the logical data block specified in the "Logical block address" field
as the starting point, is permitted. Figure 3.22 shows the method for specification of the range where
access is permitted in this command.
n
n–1

Figure 3.22 SET LIMITS command: Specifying the range where access is permitted

If "1" is specified in bit 1 of CDB byte 1, "RdInh (read inhibit)" flag or in bit 0, "WrInh (write inhibit)
flag, read operations or write operations is prohibited for linked commands following this command, as
shown below.
RdInh WrInh
0 0
0 1
1 0
1 1
When access to logical data blocks outside the address range defined by this command by linked
commands which follow this command is specified, or when a prohibited type of access operation is
specified, that command is terminated with a CHECK CONDITION status without being executed.
(When there is a violation of the (DATA PROTECT [=7] / Write protect [=27-00]: "WrInh" flag, or
when there is a violation of the (DATA PROTECT [=7] / No additional sense information [=00-00]:
"RdInh" flag.) When this command is issued again in a group of commands linked in a series, the 2nd
SET LIMITS command is rejected and a CHECK CONDITION status (DATA PROTECT [=7] /
Command sequence error [=2C-00]) is reported.
C141-C010
n: Value specified in the "Logical block address" field
n+1 n+2 n+3
m: Value specified in the "Block count" field
Range where access is permitted by linked commands
Read/write operations are permitted in the specified range.
Read operations only are permitted in the specified range.
Write operations only are permitted in the specified range.
Both read and write operations are prohibited. Only access by the SEEK
and SEEK EXTENDED commands is permitted within the specified
range.
3.2 Data Access Commands
n+m+1
Operation limits
n+m
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