Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
188
 PHY Capabilities are defined under the “SAS Speed Negotiation”
18.10.13
Mode Page 1A (Power Control)
Table 155 Page 1A (Power Control)
Byte
Bit
Default
7
6
5
4
3
2
1
0
0
PS
SPF (0b)
Page Code = 1Ah
9Ah
1
Page Length = 26h
26h
2
PM_BG_PRECEDENCE
Reserved = 0
Standby_Y
00h
3
Reserved = 0
Idle_C
Idle_B
Idle_A
Standby_Z
06h
4-7
Idle_A Condition Timer
14h
8-11
Standby_Z Condition Timer
00h
12-15
Idle_B Condition Timer
1770h
16-19
Idle_C Condition Timer
00h
20-23
Standby_Y Condition Timer
00h
24-38
Reserved
00h
39
CCF_IDLE
CCF_STANDBY
CCF_STOPPED
Reserved
58h
- If the STANDBY_Y bit is set to one, then the standby_y condition timer is enabled. If the STANDBY_Y bit is set
to zero, then the device shall ignore the standby_y condition timer.
- If the IDLE_C bit is set to one, then the idle_c condition timer is enabled. If the IDLE_C bit is set to zero, then the
device shall ignore the idle_c condition timer.
- If the IDLE_B bit is set to one, then the idle_b condition timer is enabled. If the IDLE_B bit is set to zero, then the
device shall ignore the idle_b condition timer.
- If the IDLE_A bit is set to one, then the idle_a condition timer is enabled. If the IDLE_A bit is set to zero, then the
device shall ignore the idle_c condition timer.
- If the STANDBY_Z bit is set to one, then the standby_z condition timer is enabled. If the STANDBY_Z bit is set
to zero, then the device shall ignore the standby_z condition timer.
- The IDLE_A Condition Timer field specifies the initial value, in 100 millisecond increments, for the idle_a power
condition timer. The minimum allowable inactivity time for idle_a is 1 second. Any value less than this is
accepted, but will automatically default to 1 second.
- The STANDBY_Z Condition Timer field specifies the initial value, in 100 millisecond increments, for the
standby_z power condition timer. The minimum allowable inactivity time for standby_z is 2 minutes. Any value
less than this is accepted, but will automatically default to two minutes. In addition, a limit of 60 timer initiated
head unloads per 24 hour period is enforced.
- The IDLE_B Condition Timer field specifies the initial value, in 100 millisecond increments, for the idle_b power
condition timer. The minimum allowable inactivity time for idle_b is 2 minutes. Any value less than this is
accepted, but will automatically default to two minutes. In addition, a limit 60 timer initiated head unloads per 24
hour period is enforced.
- The IDLE_C Condition Timer field specifies the initial value, in 100 millisecond increments, for the idle_c power
condition timer. The minimum allowable inactivity time for idle_c is 2 minutes. Any value less than this is
accepted, but will automatically default to two minutes. In addition, a limit of 60 timer initiated head unloads per
24 hour period is enforced.
- The STANDBY_Y Condition Timer field specifies the initial value, in 100 millisecond increments, for the
standby_y power condition timer. The minimum allowable inactivity time for standby_y is 2 minutes. Any value
less than this is accepted, but will automatically default to two minutes. In addition, a limit60 timer initiated head
unloads per 24 hour period is enforced.
- The PM_BG_PRECEDENCE field (see Table 153) specifies the interactions between background functions and