Related Manuals for Western Digital WD1007A-WAH
Summary of Contents for Western Digital WD1007A-WAH
- Page 1 USER’S GUIDE WD1007A-WAH/WA2 Winchester/Floppy Disk Controller Important Information Do Not Discard...
-
Page 2: Document Scope
Document Scope This document describes installation of the WDl007A-WAH/WA2 Winchester/Floppy Disk Controller in the IBM * Personal Computer AT * . If you have an AT compatible, you should refer to your system manuals or contact your dealer for information concerning installation of the WDl007A-WAH/WA2. -
Page 3: Hardware Installation Instructions
Set Unformatted Bytes per Sector command, so you must set jumper/switches on the drive to the desired sectors per track. Substituting the WD1007A-WAH board and installing a jumper at W8 precludes the use of the Set Unformatted Bytes/Sector command. When in the WDl007A-WA2 mode (no jumper on W8), the ESDI drive is forced to 35 sectors per track by the Set Unformatted Bytes per Sector command. - Page 4 5. Connect the 34-pin control cable to Jl connector. Keyed connectors prevent reversal of the cables. 6. Connect the control cable to the hard disk drive(s). 7. Attach a 20-pin data cable to J2 connector (for Drive 0). 8. Attach a 20-pin data cable to J3 connector (for Drive 1). 9.
- Page 5 FIGURE 1. CONTROLLER MODULE LAYOUT TABLE 1. JUMPER DEFAULT SETTINGS JUMPER FUNCTION WDl007A-WA2 WDlOO7A-WAH BIOS Address Select (C8000-09FFF) BIOS Address Select BIOS Shadow RAM Enabled Jumper Jumper Floppy Controller Enabled No Jumper Single Spindle Speed Selected No Jumper Floppy Address Select (3FX) Floppy Drive Select WD1007 Mode No Jumper...
-
Page 6: Jumper Settings
TABLE 2. ADDRESS SELECT JUMPERS Floppy Drive and Data Rate Selection Control BIOS ADDRESS RANGES JUMPER SETTINGS C8000-09FFF Jumper CA000-CBFFF Jumper CC000-CDFFF Jumper CE000-CFFFF Jumper FLOPPY ADDRESS RANGES PRIMARY/SECONDARY HARD DISK ADDRESSES No Jumper Jumper Address Select Jumpers Table 2, Address Select Jumpers, lists the various jumper configurations for address selections for both the hard drive and the floppy drive. - Page 7 Wl4 Jumper Connection Because some of the older operating systems can only recognize 17 sectors per track or a maximum of 1048 cylinders per drive, the WDl007A-WA2 provides a translation scheme so that ESDI hard disk drives can be fully utilized in the PC/AT environment. W14 (No Jumper) - The translation mode provides two types of physical to logical translation.
- Page 8 Floppy Drive and Data Rate Selection Control W5 Jumper Connection Jumper connection W5 selects either a single speed or a dual speed drive. A jumper is not normally installed, causing selection to default to a single speed drive and 125 nanoseconds precompensation.
- Page 9 ESDI drive: the system BIOS and the WD1007A BIOS. If the system BIOS is used, the exact physical drive parameters for the drive must be present in the system BIOS tables. In terms of maximum flexibility and adaptability with different drives, Western Digital recommends the use of the WD1007A BIOS.
- Page 10 Each parameter table has 16 bytes of data. Data from the BIOS ROM is displayed in hex, least significant byte first. This data breaks down as follows: Bytes 1 & 2 Number of Cylinders Byte 3 Number of Heads Bytes 4 & 5 Not Used Bytes 6 &...
- Page 11 RAM. If the drive has not been formatted, the BIOS will return a message of "drive not initialized" You will see the following screen: ** Western Digital 1007A-WA2 Initialization Utilities, Rev. l.0** PRESENT DRIVE SETUP. . . + or - to change, <ENTER. for selection...
- Page 12 low-level format will be at 35 SPT, while the parameter tables created will show 17 SPT (with translation enabled). A selection with 34 SPT. Use this feature if the system recognizes the standard 34 SPT drive. A selection with 63 SPT. Use this feature only when the drive in question has more than 1024 cylinders.
- Page 13 W14). This type of ESDI drive is always configured at 17 SPT. 4.3 WDFMT Western Digital provides a low-level format utility that allows you to prepare the drive for use by the system. The program includes routines for low-level formatting, disk verify, surface analysis and bad track entry.
- Page 14 Sector Skewing Sector skewing is a method of formatting a drive by which sector numbers are rotated in the interleave table each time a new head on a cylinder is formatted Selecting a skew of 2 causes the first sector after index on Head 0 to be identified as Sector 1. The sector identified as Sector 1 on Head 1 is the third physical sector from index as shown in the following example: Example: Ten sectors per track with a skew of 2 and 1:1 interleave...