IBM IC35L020 Hard Drive Specifications - Page 106
Power-Up In Standby feature set, Advanced Power Management feature set APM
View all IBM IC35L020 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 106 highlights
13.13.3 Recovered read errors When a read operation for a sector has failed once and then has recovered at the specific ERP step, this sector of data is reallocated automatically. A media verification sequence may be run prior to the relocation according to the predefined conditions. 13.14 Power-Up In Standby feature set The Power-Up In Standby feature set allows devices to be powered-up into the Standby power management state to minimize inrush current at power-up and to allow the host to sequence the spin-up of devices. This feature set will be enabled/disabled via the SET FEATURES command or use of jumper. When enabled by a jumper, the feature set shall not be disabled via the SET FEATURES command. The enabling of this feature set shall be persistent after power cycle. A device needs a SET FEATURES subcommand to spin-up to active state when the device has powered up into Standby. The device remains in Standby until the SET FEATURES subcommand is received. If power-up into Standby is enabled, when an IDENTIFY DEVICE is received while the device is in Standby as a result of powering up into Standby, the device shall set word 0 bit 2 to one to indicate that the response is incomplete, then only words 0 and 2 are correctly reported. The IDENTIFY DEVICE information indicates the states as follows: O identify device information is complete or incomplete O this feature set is implemented O this feature set is enabled or disabled O the device needs the Set Features command to spin-up into active state 13.15 Advanced Power Management feature set (APM) This feature allows the host to select an advanced power management level. The advanced power management level is a scale from the lowest power consumption setting of 01h to the maximum performance level of FEh. Device performance may increase with increasing advanced power management levels. Device power consumption may increase with increasing advanced power management levels. The advanced power management levels contain discrete bands described in the section on Set Feature command in detail. This feature set uses the following functions: 1. A SET FEATURES subcommand to enable Advanced Power Management. 2. A SET FEATURES subcommand to disable Advanced Power Management. Advanced Power Management, Automatic Acoustic Management, and the Standby timer setting are independent functions. The device shall enter Standby mode if any of the following are true: 1. The Standby timer has been set and times out. 2. Automatic Power Management is enabled, and the associated algorithm indicates that the Standby mode should be entered to save power. 3. Automatic Acoustic Management is enabled, and the associated algorithm indicates that the Standby mode should be entered to reduce acoustical emanations. The IDENTIFY DEVICE response word 83, bit 3 indicates that Advanced Power Management feature is supported if set. Word 86, bit 3 indicates that Advanced Power Management is enabled if set. Word 91, bits 7-0 contains the current Advanced Power Management level if it is enabled. Deskstar 60 GXP Hard disk drive specification 92