Hitachi C4K60 Specifications - Page 73
Hitachi C4K60 - Travelstar Slim - Hard Drive Manual
UPC - 683728199449
View all Hitachi C4K60 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 73 highlights
7.5.12. Idle Immediate [95h,E1h] / Unload Immediate [E1h] Default Function: Task File Registers Command LBA High LBA Mid LBA Low Device/Head Sector Count Features 7 6 5 4 3 2 1 0 95h or E1h XX XX XX X X X DRV X X X X XX XX Unload Feature (Unload Immediate Command): Task File Registers 7 6 5 4 3 2 1 0 Command E1h LBA High 55h LBA Mid 4Eh LBA Low 4Ch Device/Head X X X DRV X X X X Sector Count 00h Features 44h Default function: The IDLE IMMEDIATE command allows the host to immediately place the device in the Active Idle mode. The device clears BSY and generates an interrupt after transition to active idle mode. Unload Feature (Unload Immediate Command): The device retracts the heads onto the ramp position as soon as receiving the UNLOAD FEATURE of the IDLE IMMEDIATE command. INTRQ is asserted and BSY is cleared after the heads are completely retracted onto the ramp position and latched. The time to complete the unload operation is typically within 500 milliseconds of receiving the command. The unload controlling method by the Unload Feature of the Idle Immediate command is the same as that by power mode transition, and does not effect the specification of normal load/unload times per device life. The device stops read look-ahead operation if it is in process. If the device is performing a write operation, the device suspends writing cached data onto the media as soon as possible. And the device keeps unwritten sectors stored in the cache buffer until receiving a Software Reset, a Hardware Reset, or a any new command except IDLE IMMEDIATE with Unload Feature (Unload Immediate Command). After completion of this command, the device stays at Low Power Idle mode, does not go into Standby mode and does not load the heads onto the media until receiving a new command. If a device receives this command while the heads are currently on ramp, no physical action is needed. Power consumption of the device is higher than normal low power idle mode moved by Power Management Feature. K6610170 Rev.2 Dec 22, 2004 - 73 -