Hitachi HDS728080PLAT20 Specifications - Page 129
Table 77: Device Configuration Overlay Data structure
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Table 77: Device Configuration Overlay Data structure Word 0 1 2 3-6 7 8-254 255 Content 0001h Data Structure revision Multiword DMA modes supported 15-3 Reserved 2 1 = Multiword DMA mode 2 and below are supported 1 1 = Multiword DMA mode 1 and below are supported 0 1 = Multiword DMA mode 0 is supported Ultra DMA modes supported 15-6 Reserved 5 1 = Ultra DMA mode 5 and below are supported 4 1 = Ultra DMA mode 4 and below are supported 3 1 = Ultra DMA mode 3 and below are supported 2 1 = Ultra DMA mode 2 and below are supported 1 1 = Ultra DMA mode 1 and below are supported 0 1 = Ultra DMA mode 0 is supported Maximum LBA address Command set/feature set supported 15-9 Reserved 8 1 = 48-bit addressing feature set supported 7 1 = Host Protected Area feature set supported 6 1 = Automatic acoustic management supported 5 1 = Read/Write DMA Queued commands supported 4 1 = Power-up in Standby feature set supported 3 1 = Security feature set supported 2 1 = SMART error log supported 1 1 = SMART self-test supported 0 1 = SMART feature set supported Reserved Integrity word (see note below) 15-8 Checksum 7-0 Signature (A5h) Note: Bits 7-0 of this word contain the value A5h. Bits 15-8 of this word contain the data structure checksum. The data structure checksum is the two's complement of the sum of all byte in words 0 through 254 and the byte consisting of bits 7-0 of word 255. Each byte is added with unsigned arithmetic and overflow is ignored. The sum of all bytes is zero when the checksum is correct. Deskstar 7K80 Hard Disk Drive Specification 125