IBM IC35L040AVVN07-0 Hard Drive Specifications - Page 141

11.12 Read Buffer (E4h) Command Block Output Registers Register 76543210 Data -------- Feature -------- Sector Count Sector Number Cylinder Low Cylinder High Device/Head 1 - 1 D - - - - Command 11100100 Command Block Input Registers Register 76543210 Data -------- Error see below Sector Count Sector Number Cylinder Low Cylinder High Device/Head Status see below Error Register 76543210 CRC UNC 0 IDN 0 ABT T0N AMN 00000V00 Status Register 7 6 5 4 3 2 10 BSY RDY DF DSC DRQ COR IDX ERR 0 V 0 - - 0 -V Figure 110. Read Buffer Command (E4h) The Read Buffer command transfers a sector of data from the sector buffer of device to the host. The sector is transferred through the Data Register 16 bits at a time. The sector transferred will be from the same part of the buffer written to by the last Write Buffer command. The contents of the sector may be different if any reads or writes have occurred since the Write Buffer command was issued. Deskstar 120GXP hard disk drive specifications 127