Hitachi 7K320 Specifications - Page 172

7K320 (SATA) OEM Specification 14.54 Write Uncorrectable Ext (45h) Command Block Output Registers Register 76543210 Data Low -------- Data High -------- Feature Current Previous Sector Count Current V V V V V V V V Previous V V V V V V V V LBA Low Current V V V V V V V V Previous V V V V V V V V LBA Mid Current V V V V V V V V Previous V V V V V V V V LBA High Current V V V V V V V V Previous V V V V V V V V Device -1- - - - - - Command 01000101 Command Block Input Registers Register 76543210 Data Low -------- Data High -------- Error ...See Below... Sector Count LBA Low LBA Mid LBA High Device Status HOB=0 HOB=1 HOB=0 V V V V V V V V HOB=1 V V V V V V V V HOB=0 V V V V V V V V HOB=1 V V V V V V V V HOB=0 V V V V V V V V HOB=1 V V V V V V V V -------...See Below... Error Register 7 65432 1 0 CRC UNC 0 IDN 0 ABT T0N AMN 0 0 0V0V 0 0 Table 139 Write Uncorrectable Ext Command (45h) Status Register 7 654 3 2 1 0 BSY RDY DF DSC DRQ COR IDX ERR 0 V0V - 0 0 V The Write Uncorrectable Ext command is used to cause the device to report an uncorrectable error when the target sector is subsequently read. When the feature field contains a value of 5xh, the Write Uncorrectable Ext command causes the device to indicate a failure when reads to any of the sectors that are contained in specified sectors. Theses sectors are referred to as "pseudo uncorrectable" sectors. In this case whenever a pseudo uncorrectable sector is accessed via a read command, the device performs normal error recovery and then set the UNC and ERR bits to indicate she sector is bad. When the feature field contains a value of Axh, the Write Uncorrectable Ext command causes the device to flag the specified sector as "flagged uncorrectable". Flagging a logical sector as uncorrectable causes the device to indicate a failure when reads to specified sectors are performed. These sectors are referred to as "flagged uncorrectable" sectors. In this case whenever a "flagged uncorrectable" sector is accessed via a read command, the device sets the UNC and ERR bits without normal error recovery to indicate the sector is bad. If the Uncorrectable options are set to A5h or 55h, then sectors that have been made pseudo uncorrectable are listed as failed in the standard error logs when read back. If the Uncorrectable options are set to 5Ah or AAh, then the reading of pseudo uncorrectable sectors are not logged as an error in any standardized error logs. The pseudo uncorrectable or flagged uncorrectable status of a sector remains through a power cycle. If an uncorrectable error occurs, the write will be terminated at the failing sector. Output Parameters To The Device Feature Current Uncorrectable options 55h : Create a pseudo uncorrectable error with logging 5Ah: Create a pseudo uncorrectable error without logging A5h: Create a flagged error with logging AAh: Create a flagged error without logging Other: Reserved (command is aborted) Page 172 of 176