IBM IC35L020 - Deskstar 20 GB Hard Drive - Operating Modes; Mode Transition Times; Figure 14. Operating Modes; Figure 15. Mode Transition Times

4.3.7 Operating modes
The actuator is unloaded and spindle motor is
stopped. Only a soft reset or hard reset can change
the mode to standby.
Sleep
The actuator is unloaded and spindle motor is
stopped. Commands can be received immediately.
Standby
The spindle motor and servo system are working
normally
.
Commands can be received and processed
immediately
.
Idle
Spindle rotation @7,200 RPM with heads unloadedUnload Idle
Spindle rotation @4,500 RPM with heads unloadedLow RPM Idle
Read operation modeRead
Write operation modeWrite
Seek operation modeSeek
Start up time period from spindle stop or power downSpin-up
Description
Operating mode
Figure 14. Operating mode
s
Note: Upon power down or spindle stop a head locking mechanism will secure the heads in the
OD parking position.
4.3.8 Mode transition times
Mode transition times are shown below.
4.8 seconds
(3 Disks, typical)
4500–7200IdleLow RPM Idle
1.1 (typical)7,200IdleUnload Idle
Immediately0StandbySleep
Immediately0SleepStandby
Immediately7200–0StandbyIdle
31 (max.)
0–7200
(3 disks) 11 seconds (typical)
IdleStandby
Transition time (typical)
(seconds)
RPMToFrom
Note: The actual spin down time will exist, however the command will be processed immediately.
Figure 15. Mode transition times
Deskstar 60 GXP Hard disk drive specification
15