Hitachi 7K400 Specifications - Page 33
Operating modes
UPC - 000053412935
View all Hitachi 7K400 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 33 highlights
4.5.6 Operating modes 4.5.6.1 Description of operating modes Table 14: Description of operating modes Operating mode Description Spin-up Seek Write Start up time period from spindle stop or power down. Seek operation mode Write operation mode Read Read operation mode Unload Idle Idle Standby 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. 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 parking position. 4.5.6.2 Mode transition time Table 15: Mode transition times From To Standby Idle Idle Standby Standby Sleep Sleep Standby Unload idle Idle Idle Unload idle Low RMP Idle Idle RPM 0 ---> 7200 7200 ---> 0 0 0 7200 7200 4500->7200 Transition time (sec) Typical 15 Immediately Immediately Immediately 0.7 0.7 7 Maximum 31 Immediately Immediately Immediately 31 31 31 "Immediately" means within 1ms. Note: The command is processed immediately but there will be an actual spin down time reflecting the seconds passed until the spindle motor stops. Deskstar 7K400 Hard Disk Drive specification 19