IBM IC35L040AVVN07-0 Hard Drive Specifications - Page 32

Operating modes

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4.4.6 Operating modes 4.4.6.1 Operating mode descriptions Operating mode Spin-up Seek Write Read Description Start up time period from spindle stop or power down Seek operation mode Write operation mode Read operation mode Unload Idle Idle Standby Sleep Spindle rotation at 7200 RPM with heads unloaded Spindle motor and servo system are working normally. Commands can be received and processed immediately Actuator is unloaded and spindle motor is stopped. Commands can be received immediately Actuator is unloaded and spindle motor is stopped. Only soft reset or hard reset can change the mode to standby Note: Upon power down or spindle stop a head locking mechanism will secure the heads in the OD parking position. 4.4.6.2 Mode transition times Mode transition times are shown below. From Standby Idle Standby Sleep Unload idle Idle To Idle Standby Sleep Standby Idle Unload Idle RPM 0 -> 7200 (3 disks) 7200 -> 0 0 0 7,200 7,200 Transition time (typical ) (sec) 12 Immediately Immediately Immediately 0.7 0.7 Transition time (max) (sec) 31 Immediately Immediately Immediately Note: The command is processed immediately but there will be an actual spin down time reflecting the seconds passed until the spindle motor stops. Figure 15. Mode transition times Deskstar 120GXP hard disk drive specifications 18

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4.4.6 Operating modes
4.4.6.1
Operating mode descriptions
Operating mode
Description
Spin-up
Start up time period from spindle stop or power down
Seek
Seek operation mode
Write
Write operation mode
Read
Read operation mode
Unload Idle
Spindle rotation at 7200 RPM with heads unloaded
Idle
Spindle motor and servo system are working normally
.
Commands can be re-
ceived and processed immediately
Standby
Actuator is unloaded and spindle motor is stopped.
Commands can be received
immediately
Sleep
Actuator is unloaded and spindle motor is stopped.
Only soft reset or hard reset
can change the mode to standby
Note: Upon power down or spindle stop a head locking mechanism will secure the heads in the OD park-
ing position.
4.4.6.2
Mode transition times
Mode transition times are shown below.
Note: The command is processed immediately but there will be an actual spin down time reflecting the
seconds passed until the spindle motor stops.
0.7
7,200
Unload Idle
Idle
0.7
7,200
Idle
Unload idle
Immediately
Immediately
0
Standby
Sleep
Immediately
Immediately
0
Sleep
Standby
Immediately
Immediately
7200 -> 0
Standby
Idle
31
12
0 -> 7200 (3 disks)
Idle
Standby
Transition time
(max)
(sec)
Transition time
(typical )
(sec)
RPM
To
From
Figure 15. Mode transition times
Deskstar 120GXP hard disk drive specifications
18