Use this product only after thoroughly reading and understanding especially the section “Important Alert Items” in this manual. Keep this manual handy, and keep it carefully. FUJITSU makes every effort to prevent users and bystanders from being injured or from suffering damage to their property. Use the product according to this manual. IMPORTANT NOTE TO USERS READ THE ENTIRE MANUAL CAREFULLY BEFORE USING THIS PRODUCT. INCORRECT USE OF THE PRODUCT MAY RESULT IN INJURY OR DAMAGE TO USERS, BYSTAND

(7) VCM current sense resistor (CSR) This resistor controls current at the power amplifier by converting the VCM current into voltage and feeding back. 4-14 C141-E224 4.7 Servo Control 4.7.2 Data-surface servo format Figure 4.7 describes the physical layout of the servo frame. The three areas indicated by (1) to (3) in Figure 4.7 are described below. (1) Inner guard band This area is located inside the user area, and the rotational speed of the VCM can be controlled on this cylinder area for hea

• Error data structure Indicates the status register when an error occurs. • Total number of drive errors Indicates total number of errors registered in the error log. • Checksum Two's complement of the lower byte, obtained by adding 511-byte data one byte at a time from the beginning. • Status Bits 0 to 3: Indicates the drive status when received error commands according to the following table. Bits 4 to 7: Vendor unique Status Meaning 0 Unclear status 1 Sleep status 2 Standby status 3 Active s

• Error reporting conditions (1) This command is issued twice or more in an operation sequence. (ST = 51h, ER = 10h) (2) The READ NATIVE MAX ADDRESS EXT command (27h) is not issued immediately before this command (ST = 51h, ER = 04h) is issued. (3) This command is issued in CHS mode (ST = 51h, ER = 04h) (4) The SET MAX ADDRESS command has already been issued. (ST = 51h, ER = 04h) (5) A SATA communication error occurred (ST = 51h, ER = 14h). C141-E224 5-133 Interface At command issuance (Shadow B