Hitachi HDT725025VLA380 Specifications - Page 126

Outputs: (TF Data) Command Block Input Registers (Success) Error 00h Sector Count Number of ECC bytes (LSB) Sector Number Number of ECC bytes (MSB) Cylinder Low Number of sectors to transfer (LSB) = 02h Cylinder High Number of sectors to transfer (MSB) = 00h Device/Head reserved Status 50h The Long Sector format for both read and write is two (512-byte) blocks long. The first block contains the user data, the second data block contains the ECC bytes, the remainder of the second block sould be all zeros. Once the key sector has been issued and the TF Data indicates that the drive is ready to transfer data, log page E1h should be read or written to transfer the data. Long Sector Access commands cause a forced unit access to occur. Field User Data ECC Data reserved Size (bytes) 512 51 461 Description First Block This is the data normally sent or returned by a read or write command. This data may be encoded. Second Block ECC bytes in Vendor Specific Format. The number of bytes is returned as TF Data on both read and write. All zeros 10.18.2.2 LBA Segment Access (action code: 0002h) Word 0 Name Action Code 1 Function Code 5:2 9:6 11:10 Start LBA Count Pattern 255:12 reserved Value 0002h 0001h 0002h 0101h 0102h QWord QWord DWord 0000h Description This action writes a pattern or sector of data repeatedly to the media. This capability could also be referred to as "Write All" or "Write Same". Repeat Write Pattern (Background Operation) Repeat Write Sector (Background Operation) Repeat Write Pattern (Blocking Operation) Repeat Write Sector (Blocking Operation) First LBA Number of sectors to fill If the Function Code is 0001h, this field contains a 32-bit pattern that is written on the media starting at the location specified in words two through five Deskstar T7K500 Hard Disk Drive Specification 112