User manual MAXTOR ST31082A

[. . . ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Medalist Family: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST3636A/ST31082A/ST31276A Intelligent Disk Drive Product Manual P/N 20401028-001 Revision C September 1996 920 Disc Drive Scotts Valley, California 95066 FCC Notice This equipment generates and uses radio frequency energy and, if not installed and used properly; that is, in strict accordance with the manufacturer's instructions, may cause interference to radio and television reception. It has been type tested and found to comply with the limits for a Class B computing device in accordance with the specifications in Part 15 of FCC Rules, which are designed to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation. [. . . ] If words 82 and 83 =0000H or FFFFH command set notification not supported. bits bit bit bit bit 4-15 3 2 1 0 0 = (reserved) 1 = support power management feature set 1 = support removable feature set 1 = support security feature set 1 = support SMART feature set 83 Command sets supported. If word 82 and 83 =0000H or FFFFH command set notification not supported. bit bit bit 15 0 = must be cleared to 0 14 1 = must be set to 1 13-0 0 = (reserved) 84-127 128 129-159 160-255 Reserved Security Status - Not implemented Vendor specific Reserved * PIO Timing Parameters Cycle Time ** Multiword DMA Timing Cycle Time *** Advanced PIO Timing Cycle Time Mode 0 (nsec) 600 Mode 0 (nsec) 480 Mode 1 (nsec) 383 Mode 1 (nsec) >= 150 Mode 2 (nsec) 240 Mode 2 (nsec) >= 120 Mode 3 (nsec) >= 180 Mode 4 (nsec) >= 120 Page 52 ST3636A/ST31082A/ST31276A Command Set Chapter 7 Initialize Device Parameters Command Number: 91 hex Description: This command enables the host to set the head switch and cylinder increment points for multiple sector operations. The drive calculates the number of available logical cylinders based upon the total number of available blocks and the values contained in the Sector Count and Drive/Head registers. The sector and head values in the Task File are not checked for validity by this command. If they are invalid, no error will be reported until an illegal access is made by some other command. Cylinder head increments on subsequent commands will occur after access of the maximum sector and maximum head specified by this command. Upon receipt of the command, the drive sets BSY, saves the parameters, resets BSY, and generates an interrupt. Seagate has established a Universal Translate Mode which enables you to configure the drive in an AT environment to any cylinder, head, and sector configuration desired (refer to chapter 3). Technical Reference Manual Page 53 Chapter 7 Command Set Power Commands Command Number: Ex hex Description: The Power commands are supported on some Seagate drives, including the ST3636A, ST31082A and ST31276A. If a Power command is issued to a drive that does not support the Power commands, an Abort status will be returned to the host in the Error register. The following table describes these commands: Error Code: E0 hex E1 hex E2 hex Description: The drive enters Standby Mode immediately The drive enters Idle Mode immediately The drive enters Standby Mode immediately. If the Sector Count register is non-zero, then the Auto Power-Down feature is enabled and will take effect when the drive returns to Idle Mode. If the Sector Count register is zero, then the Auto Power-Down feature is disabled. E3 hex The drive enters Idle Mode immediately. If the Sector Count register is non-zero, then the Auto Power-Down feature is enabled and will take effect immediately. If the Sector Count register is zero, then the Auto Power-Down feature is disabled. E5 hex Puts FF hex in the Sector Count register if the drive is in Idle Mode. Puts 00 hex in the Sector Count register if the drive is in, going to, or recovering from the Standby Mode. Puts BB hex in the Sector Count register if power lock is enabled. E6 hex The drive enters Sleep Mode. A reset is required to bring the drive out of Sleep Mode. Note: Minimum power off/on cycle time is 60 seconds. Page 54 ST3636A/ST31082A/ST31276A Command Set Chapter 7 All of the Power commands except command E6 will execute immediately and return the ending interrupt after the spin up/down sequence is initiated. Please note that if the drive is already spinning (Idle Mode) and a spin-up command is issued from the host, the spin-up sequence is not initiated. Similarly, if the drive is in Standby Mode and the host issues a spin-down command, the spin-down sequence is not initiated. Return of the ending interrupt does not mean that the drive has fully transitioned to the desired operating mode. [. . . ] Cylinder, logical - A mapping of sectors on the disk drive into an imaginary cylinder for purposes of achieving compatibility with legacy addressing schemes. . Traditionally, a device on the ATA interface has been a hard disk drive, but any form of storage device may be placed on the ATA interface provided it adheres to this standard. Device selection - A device is selected when the DEV bit of the Drive/Head register is equal to the device number assigned to the device by means of a Device 0/Device 1 jumper or switch, or use of the CSEL signal. DMA (Direct memory access) - A means of data transfer between device and host memory without host processor intervention. [. . . ]