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

4.3.7 Operating modes

Operating mode
Spin-up
Seek
Write
Read
Low RPM Idle
Unload Idle
Idle
Standby
Sleep
Figure 14. Operating mode
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.
From
Standby
Idle
Standby
Sleep
Unload Idle
Low RPM Idle
Note: The actual spin down time will exist, however the command will be processed immediately.

Figure 15. Mode transition times

Start up time period from spindle stop or power down
Seek operation mode
Write operation mode
Read operation mode
Spindle rotation @4,500 RPM with heads unloaded
Spindle rotation @7,200 RPM with heads unloaded
The spindle motor and servo system are working
normally. Commands can be received and processed
immediately.
The actuator is unloaded and spindle motor is
stopped. Commands can be received immediately.
The actuator is unloaded and spindle motor is
stopped. Only a soft reset or hard reset can change
the mode to standby.
s
To
Idle
(3 disks) 11 seconds (typical)
Standby
Sleep
Standby
Idle
Idle
Deskstar 60 GXP Hard disk drive specification
Description
RPM
0–7200
7200–0
0
0
7,200
4500–7200
15
Transition time (typical)
(seconds)
31 (max.)
Immediately
Immediately
Immediately
1.1 (typical)
4.8 seconds
(3 Disks, typical)