User Manual

SCSI Commands Reference Manual, Rev. J 499
www.seagate.com Parameters for direct access devices
PROVISIONING TYPE field
The PROVISIONING TYPE field is defined in table 470.
THRESHOLD PERCENTAGE field
A THRESHOLD PERCENTAGE field set to zero indicates that the logical unit does not support logical block provisioning percentages. If logical
block provisioning percentages are supported, then the threshold percentage shall be set to a non-zero value selected from the values in
table
471.The units for the threshold percentage is tenths of a percent. This percentage represents the range over which logical block provisioning
threshold percentages operates as described in SBC-4.
PROVISIONING GROUP DESCRIPTOR field
The PROVISIONING GROUP DESCRIPTOR field, if any, contains a designation descriptor (see SPC-5) for the LBA mapping resources used by this
logical unit.
If a PROVISIONING GROUP DESCRIPTOR field is present:
a) the ASSOCIATION field shall be set to 00b (i.e. logical unit); and
b) the DESIGNATOR TYPE field shall be set to:
A) 1h (i.e., T10 vendor ID based); or
B) 3h (i.e., NAA).
Table 470 Provisioning Type field
Code Description
000b
The device server does not report a provisioning type.
001b
The logical unit is resource provisioned (see SBC-4).
010b
The logical unit is thin provisioned (see SBC-4).
All others
Reserved
Table 471 MINIMUM PERCENTAGE field
Code Description
0
The logical unit does not support logical block provisioning percentages
1 to 255
(i.e., 01h to FFh
0.1% to 25.5% of the total allocation resources