Command Processing While Reserved - IBM Ultrastar 36LZX Specifications

Command (w/Option)
Request Sense
Inquiry (EVPD=0)
Inquiry (EVPD=1)
Test Unit Ready
Format Unit
Other Commands
Note: Mode Page 0 byte 5 bit 4 (FDD) = 0
Figure 184. Format Command Failure Degraded Mode

11.1.10 Command processing while reserved

A logical unit is reserved after successful execution of the Reserve command. Each time a Reserve
command is executed successfully, the Target records the SCSI ID of the Initiator that made the re-
servation and the SCSI ID of the Initiator that is to receive the reservation. This information is needed to
determine whether subsequent commands should be permitted or if the Reservation Conflict Status
should be reported. The Initiator that made the reservation is the Initiator that issued the Reserve com-
mand. The Initiator to receive the reservation may be either the same or a different Initiator (third-party
reservation).
If the logical unit is reserved when a new command is received, the Target examines the command
opcode and the SCSI ID of the issuing Initiator to determine whether a Reservation Conflict Status
should be returned based on the following rules:
1. If the issuing Initiator is the one that made the reservation and also the one to receive the reservation,
then all commands are permitted.
2. If the issuing Initiator is neither the one that made the reservation nor the one to receive the
reservation then
Ÿ A Request Sense or Inquiry command is permitted.
Ÿ A Release command is permitted but is ignored
Ÿ Any other command results in a Reservation Conflict Status.
Response
Executed. The Target may return
Sense Key 02h (Not Ready) ASC/ASCQ 3100h (Format
Corrupted)
Sense Key 03h (Medium Error) ASC/ASCQ 3100h (Format
Corrupted)
Executed
Executed
Executed and Check Condition is returned with Sense Key
02h (Not Ready) ASC/ASCQ 3100h (Format Corrupted)
Executed
- Success: Good Status is returned. Format Degraded
Mode is cleared
– Failure: Check Condition Status is returned and
Format Degraded Mode is NOT cleared.
Not Executed. Check Condition Status is returned with
Sense Key 03h (Medium Error) ASC/ASCQ 3100h (Format
Corrupted)
Ultrastar 36LZX hard disk drive specifications
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