Hitachi P7K500 Specifications - Page 269
Sector Count Current
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UPC - 683728126674
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Output Parameters To The Device Feature Current URG (bit7) URG specifies an urgent transfer request. The Urgent bit specifies that the command should be completed in the minimum possible time by the device and shall be completed within the specified Command Completion Time Limit. WC (bit6) F (bit5) HSE (bit4) Stream ID (bit 0..2) Feature Previous Sector Count Current WC specifies Write Continuous mode enabled. If the Write Continuous bit is set to one, the device shall not stop execution of the command due to errors. If the WC bit is set to one and errors occur in transfer or writing of the data, the device shall continue to transfer the amount of data requested and then provide ending status with BSY bit cleared to zero, the SE bit set to one, the ERR bit cleared to zero, and the type of error, IDNF or ABRT reported in the error log. If the WC bit is set to one and the Command Completion Time Limit expires, the device shall stop execution of the command and provide ending status with the BSY bit cleared to zero, the SE bit set to one, the ERR bit cleared to zero, and report the fact that the Command Completion Time Limit expired by setting the CCTO bit in the error log to one. In all cases, the device shall attempt to transfer the amount of data requested within the Command Completion Time Limit even if some data transferred is in error. F specifies that all data for the specified stream shall be flushed to the media before command complete is reported when set to one. HSE (Handle Stream Error) specifies that this command starts at the LBA of the last reported error for this stream, so the device may attempt to continue its corresponding error recovery sequence where it left off earlier. Stream ID specifies the stream being written. The device shall operate according to the Stream ID set by the Write Stream command. The time allowed for the current command's completion is calculated as follows: Command Completion Time Limit = (content of the Feature register Previous) * (Identify Device words (99:98)) useconds If the value is zero, the device shall use the Default CCTL supplied with a previous Configure Stream command for this Stream ID. If the Default CCTL is zero, or no previous Configure Stream command was defined for this Stream ID, the device will ignore the CCTL. The time is measured from the write of the command register to the final INTRQ for command completion. The minimum CCTL is 50ms.CCTL is set to 50ms when the specified value is shorter than 50ms. The number of continuous sectors to be transferred low order, bits (7:0) Sector Count Previous The number of continuous sectors to be transferred high order, bits (15:8). If zero is specified in the Sector Count register, then 65,536 sectors will be transferred. Sector Number Current LBA (7:0). Sector Number Previous LBA (31:24). Cylinder Low Current LBA (15:8). Cylinder Low Previous LBA (39:32). Cylinder High Current LBA (23:16). Cylinder High Previous LBA (47:40). HITACHI Deskstar & CinemaStar P7K500 Hard Disk Drive specification (Rev 1.1) 261
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