Reserve (10) Command - Seagate ST11200 Product Manual

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5.2.2.11 Reserve (10) command (56h)
The RESERVE and RELEASE commands provide the basic mechanism for contention resolution in multiple-
initiator systems. The RESERVE (10) command (Table 5.2.2-11) is used to reserve a logical unit or, if the
extent reservation option is implemented, extents within a logical unit. The third-party reservation allows
logical units or extents to be reserved for another specified SCSI device.
Bit 7
Byte(s)
0
1 Logical Unit No. [1]
0
2
3
4
5
6
7 (MSB)
8
9
Notes:
[1] The Logical Unit Number must be zero.
[2] If bit 4 is zero, byte 2 must also be zero.
If bit 4 is one, byte 2 identifies the SCSI bus ID of the device for which the drive is reserved.
[3] Must be zero if not supported by the drive. See drive Product Manual.
[4] Must be zero if not supported by the drive. See drive Product Manual.
[5] See "Control Byte" paragraph 4.2.6.
For additional information about the fields of this command see section 5.2.1.8.
Product Manual - Disc Drive SCSI-2/SCSI-3 Interface (Vol. 2; Ver. 2), Rev. E
Table 5.2.2-11. Reserve (10) Command
6 5
Operation Code (56h)
0 0
Reservation Identification
Third Party Device ID
Reserved
Reserved
Reserved
Extent List Length
Contol
4 3
3rdPty
[2]
[3]
2 1
Reserved Extent
(LSB)
0
[3]
[4]
[2]
[5]