User manual HITACHI DESKSTAR P7K500 MANUAL

[. . . ] Hitachi Global Storage Technologies Hard Disk Drive Specification Hitachi Deskstar P7K500 Hitachi CinemaStar P7K500 3. 5 inch hard disk drive Models: HDP725016GLAT80 HDP725016GLA380 HDP725025GLAT80 HDP725025GLA380/1 HDP725032GLAT80 HDP725032GLA380 HDP725032GLA360/1 HDP725040GLAT80 HDP725040GLA380 HDP725040GLA360/1 HDP725050GLAT80 HDP725050GLA380 HDP725050GLA360/1 HCP725016GLAT80 HCP725016GLA380 HCP725025GLAT80 HCP725025GLA380 HCP725032GLAT80 HCP725032GLA380 HCP725050GLAT80 HCP725050GLA380 Revision 1. 0 (November 14, 2007) The following paragraph does not apply to the United Kingdom or any country where such provisions are inconsistent with local law: HITACHI GLOBAL STORAGE TECHNOLOGIES Inc. PROVIDES THIS PUBLICATION "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer or express or implied warranties in certain transactions, therefore, this statement may not apply to you. This publication could include technical inaccuracies or typographical errors. [. . . ] This is a one byte 2's complement number that allows a range from -127°C to +127°C to be specified. This is a one byte 2's complement number that allows a range from -127°C to +127°C to be specified. This is a fixed value. 7 Byte Over Limit 8 Byte Min Op Limit 9 Byte Under Limit 29:10 31:30 Byte[20] Word Reserved Queue Size Number of entry locations in history queue. This value is 128. 33:32 Word Queue Index Last updated entry in queue. Queue Index is zero-based, so Queue Index 0000h is the first location in the buffer (at offset 34). The most recent temperature entered in the buffer is at Queue Index + 34. See Note 1 and Note 2. HITACHI Deskstar & CinemaStar P7K500 Hard Disk Drive specification (Rev 1. 1) 108 (Queue Size+33):34 Byte[Queue Size] Queue Buffer This is a circular buffer of absolute HDA Temperature values. These are one byte 2's complement numbers, which allow a range from -127°C to +127°C to be specified. A value of 80h indicates an initial value or a discontinuity in temperature recording. The Actual time between samples may vary because commands may not be interrupted. See Not 1. If the host changes the logging interval using the volatile option, the interval between entries in the queue may change between power cycles with no indication to the host. 511:(Queue Size +34) Byte[512-Queue Size-34] Reserved Note 1 ­ The Absolute HDA Temperature History is preserved across power cycles with the requirement that when the drive powers up, a new entry is made in the history queue of 80h, an invalid absolute temperature value. This way an application viewing the history can see the discontinuity in temperature result from the drive being turned off. Note 2 ­ When the Absolute HDA Temperature history is cleared, for new drives or after changing the Logging Interval, the Queue Index shall be set to zero and the first queue location shall be set to the current Absolute HDA Temperature value. Table 78 Data Format of HDA Absolute Temperature History Table HITACHI Deskstar & CinemaStar P7K500 Hard Disk Drive specification (Rev 1. 1) 109 HITACHI Deskstar & CinemaStar P7K500 Hard Disk Drive specification (Rev 1. 1) 110 9. 0 Command Protocol The commands are grouped into different classes according to the protocols followed for command execution. The command classes with their associated protocols are defined below. device command layer protocol) and Serial ATA II: Extensions to Serial ATA 1. 0a (Section 4. For all commands, the host must first check if BSY=1, and should proceed no further unless and until BSY=0. For all commands, the host must also wait for RDY=1 before proceeding. A device must maintain either BSY=1 or DRQ=1 at all times until the command is completed. The INTRQ signal is used by the device to signal most, but not all, times when the BSY bit is changed from 1 to 0 during command execution. A command shall only be interrupted with a COMRESET or software reset. The result of writing to the Command register while BSY=1 or DRQ=1 is unpredictable and may result in data corruption. A command should only be interrupted by a reset at times when the host thinks there may be a problem, such as a device that is no longer responding. [. . . ] It is possible that an `uncorrectable' sector location has actual physical errors. In this case read commands and/or write commands shall return ERR status information that is consistent with the error. If the LOG feature is set to x5h sectors that have been made pseudo uncorrectable when read back shall be listed as failed in the standard error logs and shall cause SMART utilities to indicate failure if too many sectors are uncorrectable. The LOG feature set to xAh shall indicate that reading of pseudo uncorrectable sectors shall not be logged as an error in any standardized error logs. [. . . ]