User manual SONY CFS-W500L

[. . . ] This manual explains, in detail, how to incorporate the hard disk drives into user systems. This manual assumes that users have a basic knowledge of hard disk drives and their application in computer systems. This manual consists of the following six chapters: Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 DEVICE OVERVIEW DEVICE CONFIGURATION INSTALLATION CONDITIONS THEORY OF DEVICE OPERATION INTERFACE OPERATIONS In this manual, disk drives may be referred to as drives or devices. C141-E110-03EN iii Conventions for Alert Messages This manual uses the following conventions to show the alert messages. The alert signal consists of an alert symbol and a signal word or just a signal word. [. . . ] Upon receipt of this command, the device sets the BSY bit of Status register and sets up the sector buffer for a read operation. Then the device sets the DRQ bit of Status register, clears the BSY bit, and generates an interrupt. After that, the host system can read up to 512 bytes of data from the buffer. At command issuance (I/O registers setting contents) 1F7H(CM) 1F6H(DH) 1F5H(CH) 1F4H(CL) 1F3H(SN) 1F2H(SC) 1F1H(FR) 1 × 1 × 1 × 0 DV xx xx xx xx xx 0 1 xx 0 0 At command completion (I/O registers contents to be read) 1F7H(ST) 1F6H(DH) 1F5H(CH) 1F4H(CL) 1F3H(SN) 1F2H(SC) 1F1H(ER) × × × Status information DV xx xx xx xx Error information xx (21) WRITE BUFFER (X'E8') The host system can overwrite the contents of the sector buffer of the device with a desired data pattern by issuing this command. Upon receipt of this command, the device sets the BSY bit of the Status register. Then the device sets the DRQ bit of Status register and clears the BSY bit when the device is ready to receive the data. After that, 512 bytes of data is transferred from the host and the device writes the data to the sector buffer, then generates an interrupt. At command issuance (I/O registers setting contents) 1F7H(CM) 1F6H(DH) 1F5H(CH) 1F4H(CL) 1F3H(SN) 1F2H(SC) 1F1H(FR) 1 × 1 × 1 × 0 DV xx xx xx xx xx 1 0 xx 0 0 5 - 44 C141-E110-03EN At command completion (I/O registers contents to be read) 1F7H(ST) 1F6H(DH) 1F5H(CH) 1F4H(CL) 1F3H(SN) 1F2H(SC) 1F1H(ER) (22) IDLE (X'97' or X'E3') Upon receipt of this command, the device sets the BSY bit of the Status register, and enters the idle mode. The device generates an interrupt even if the device has not fully entered the idle mode. If the spindle of the device is already rotating, the spin-up sequence shall not be implemented. If the contents of the Sector Count register is other than 0, the automatic power-down function is enabled and the timer starts countdown immediately. When the timer reaches the specified time, the device enters the standby mode. If the contents of the Sector Count register is 0, the automatic power-down function is disabled. It is necessary for the host to set the keys (CL = 4Fh and CH = C2h) in the CL and CH registers prior to issuing this command. When the failure prediction feature is disabled, the Aborted Command error is posted in response to subcommands other than SMART Enable Operations (FR register = D8h). When the failure prediction feature is enabled, the device collects or updates several items to forecast failures. In the following sections, note that the values of items collected or updated by the device to forecast failures are referred to as attribute values. 5 - 50 C141-E110-03EN Table 5. 8 Features Register values (subcommands) and functions (1/2) Features Resister X'D0' Function SMART Read Attribute Values: A device that received this subcommand asserts the BSY bit and saves all the updated attribute values. The device then clears the BSY bit and transfers 512-byte attribute value information to the host. * For information about the format of the attribute value information, see Table 5. 9. SMART Read Attribute Thresholds: This subcommand is used to transfer 512-byte insurance failure threshold value data to the host. * For information about the format of the insurance failure threshold value data, see Table 5. 10. SMART Enable-Disable Attribute AutoSave: This subcommand is used to enable (SC register 00h) or disable (SC register = 00h) the setting of the automatic saving feature for the device attribute data. The setting is maintained every time the device is turned off and then on. When the automatic saving feature is enabled, the attribute values are saved after 15 minutes passed since the previous saving of the attribute values. [. . . ] (If the drive stacks a write command, for that the drive posts the command completion, next to the command that write operation is stopped by error occurrence. ) After an error occurs at above write operation, the drive posts the error status to the host system at next command. (The drive does not execute this command, sets the error status that occurred at the write operation, and generates the interrupt for abnormal end. However, when the drive receives a write command after the completion of error processing, the drive posts the error after writing the write data of the write command. ) 6 - 20 C141-E110-03EN At the time that the drive has stopped the command execution after the error recovery has failed, the write cache function is disabled automatically. The releasing the disable state can be done by the SET FEATURES command. [. . . ]