IBM IC35L020 Hard Drive Specifications - Page 29

Operating modes, 3.8 Mode transition times, Low RPM Idle

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4.3.7 Operating modes Operating mode Spin-up Seek Write Read Low RPM Idle Unload Idle Idle Standby Sleep Description 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. Figure 14. Operating modes 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 To RPM Transition time (typical) (seconds) Idle 0-7200 (3 disks) 11 seconds (typical) 31 (max.) Idle Standby Sleep Unload Idle Low RPM Idle Standby Sleep Standby Idle Idle 7200-0 0 0 7,200 4500-7200 Immediately Immediately Immediately 1.1 (typical) 4.8 seconds (3 Disks, typical) 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

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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 unloaded
Unload Idle
Spindle rotation @4,500 RPM with heads unloaded
Low RPM Idle
Read operation mode
Read
Write operation mode
Write
Seek operation mode
Seek
Start up time period from spindle stop or power down
Spin-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)
4500–7200
Idle
Low RPM Idle
1.1 (typical)
7,200
Idle
Unload Idle
Immediately
0
Standby
Sleep
Immediately
0
Sleep
Standby
Immediately
7200–0
Standby
Idle
31 (max.)
0–7200
(3 disks) 11 seconds (typical)
Idle
Standby
Transition time (typical)
(seconds)
RPM
To
From
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