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Fibre Channel Interface Manual, Rev. D 241
12.13.12 Power Condition page (1Ah)
The Power Condition page provides the initiator the means to control the length of time a logical unit will delay
before changing its power requirements. There is no notification to the initiator that a logical unit has entered
into one of the power conditions. On receipt of this command, the device adjusts itself to the power condition
which allows the command to execute. The timer which maps to this power condition and any lower power con-
dition timers is reset on receipt of the command. The timer associated with this power condition is restarted
when the condition that forces the change in power completes.
Field definitions (listed alphabetically)
Idle
1 The drive will use the Idle Condition Timer to determine the length of inactivity time to wait before entering the Idle
condition.
0 The drive will not enter the Idle condition.
Idle Condition Timer
The inactivity time (in 100 millisecond increments) that the logical unit will wait before entering the Idle condition. Minimum
time is 500 milliseconds.
Page Code
1Ah Power Condition page code.
Page Length
0Ah The length of the Power Condition page (in bytes). If the allocation length is too small to transfer all of the page, the
page length is not adjusted to reflect the truncation.
PS (Parameter Savable)
This bit is only used with the Mode Sense command. This bit is not used with the Mode Select command.
1 The drive is capable of saving the page in a nonvolatile vendor-specific location.
Standby
1 The drive will use the Standby Condition Timer value to determine the length of inactivity time to wait before entering
the Idle condition.
0 The drive will not enter the Idle condition.
Table 157: Power Condition page (1Ah)
Bit
Byte
76543210
0 PS Reserved Page Code (1Ah)
1
Page Length (0Ah)
2
Reserved
3 Reserved Idle Standby
4 (MSB)
Idle Condition Timer
5
6
7 (LSB)
8 (MSB)
Standby Condition Timer
9
10
11 (LSB)
Table
number
157
157
157
157
157
157