IBM IC35L040AVVN07-0 Hard Drive Specifications - Page 137

11.8 Idle (E3h/97h) Command Block Output Registers Register 76543210 Data -------- Feature -------- Sector Count V V V V V V V V Sector Number Cylinder Low Cylinder High Device/Head 1 - 1 D - - - - Command 11100011 Command Block Input Registers Register 76543210 Data -------- Error see below Sector Count Sector Number Cylinder Low Cylinder High Device/Head Status see below Error Register 76543210 CRC UNC 0 IDN 0 ABT T0N AMN 00000V00 Status Register 7 6 5 4 3 2 10 BSY RDY DF DSC DRQ COR IDX ERR 0 V 0 V - 0 -V Figure 106. Idle Command (E3h/97h) The Idle command causes the device to enter Idle mode immediately and to set the auto power down time-out parameter (standby timer). And the timer then starts counting down. When the Idle mode is entered, the device is spun up to operating speed. If the device is already spinning, the spin up sequence is not executed. During Idle mode the device is spinning and ready to respond to host commands immediately. Output parameters to the device Sector Count Time-out Parameter. If it is zero, the automatic power down sequence is disabled. If it is nonzero, the automatic power down sequence is enabled. The time-out interval is shown below: Value Time-out 0 Timer disabled 1-240 Value x 5 241-251 (Value-240) x 30 minutes 252 21 minutes 253 8 hours 254 21 minutes 10 seconds 255 21 minutes 15 seconds When the automatic power down sequence is enabled, the drive will enter Standby mode automatically if the time-out interval expires with no drive access from the host. The time-out interval will be reinitialized if there is a drive access before the time-out interval expires Deskstar 120GXP hard disk drive specifications 123