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- USER DOCUMENTATION
-
- WESTERN DIGITAL USER DIAGNOSTICS
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-
- This document is intended to accompany the utility USERDIAG.EXE
- placed on this bulletin board for your convenience.
-
- The utility is a safe, non-destructive way for your customer
- (or your self) to verify the configuration of your AT
- compatible computer, and to specifically test the hard drive/
- controller subsystem.
-
- Upon loading the program, the low-order ram pointer bytes are
- presented to the screen. The machine's power-on self tests
- test installed peripherals, and if valid ones exsist, the
- tables are updated.
-
-
- NOTE : THIS UTILITY DOES NOT PERFORM THE SETUP OR FORMAT
- FUNCTIONS. THESE FUNCTIONS MUST BE PERFORMED BY
- THE MACHINE'S MANUFACTURER-SUPPLIED SETUP AND
- FORMAT UTILITIES. IN THE EVENT A FORMATTER IS
- REQUIRED, WE SUGGEST THE OBTAINING OF THE WD
- UTILITY WDFMT.
-
-
- A sample of the start-up screen follows:
-
-
-
- System contains the following :
-
- 640K bytes of RAM
- 2 Floppy disk drive(s)
- 1 Parallel printer port(s)
- 2 Asynchronous serial port(s)
- 1 Hard disk drive(s) of the following configuration(s) ...
-
- Drive Cylinders Heads Precomp cyl Landing zone Sectors/track
-
- 0 820 10 65535 820 17
-
- Total formatted capacity of drive 0 is 71,372,800 bytes
-
- If the above information is not correct, run your system's setup utility
-
- The following diagnostic will use the configuration information above
-
- Do you want to do a hard drive / controller diagnostic ( y / n) ??
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- Note that the total count for all devices, as well as the
- physical capacity of the hard drive is indicated. The useable
- capacity is somewhat less, due to the partitioning method
- that DOS uses.
-
- You can proceed to the controller/drive diagnostic by typing
- 'y' now. No return is necessary.
-
- The disk diagnostic is useful for a problem installation,
- or to verify absolute disk addresses in the event of a disk
- error later.
-
- The user can directly enter any cylinder, sector, or head
- he desires to test. The drive number can also be selected
- if TWO drives are present. The amount of sectors to test
- (sector count) is valid only for a (R)ead operation. If
- no value is entered for any parameter, the program
- automatically chooses:
-
- drive = 0
- cylinder = 0
- head = 0
- sector no. = 1
- sector count = 256
- command = re(Z)ero
-
- The currently supported commands are :
-
- re(Z)ero ....... recalibrates drive to cylinder 0
-
- (S)eek ....... positions drive to any cylinder
-
- (R)ead ....... transfers data from drive starting
- at location chosen, and continues
- for duration of sector count
-
- (W)rite / read . transfers a random pattern of
- data to the drive, then reads
- it back, and checks for errors.
- THIS IS DONE ONLY AT THE LAST
- SECTOR OF THE DRIVE. YOU CANNOT
- CHANGE THE LOCATION.
-
- (A)ll .......... each of the preceeding commands
- done in order. Any error will
- terminate the sequence, and you
- have the option of trying a
- single command.
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- As you may notice, the sector number, sector count, and
- head number have no bearing on re(Z)ero and (S)eek
- commands.
-
- IMPORTANT NOTE : Illegal disk addresses have been screened
- for, and the following is how the program
- handles them.
-
- ILLEGAL SECTOR NUMBER : results when sector 0 or a sector number
- greater than the actual sector per track
- count is selected. Sector 0 is fixed
- to 1, and the sector per track value
- from the system BIOS is the maximum.
-
- ILLEGAL HEAD NUMBER : results when a head number greater
- than ONE LESS THAN THE BIOS VALUE
- is selected. Head (<0) is fixed to 0
- and head numbers are truncated at
- one less than the BIOS value.
-
- ILLEGAL CYLINDER NO. : results when a cylinder number less
- than zero or greater than ONE LESS
- than the BIOS table. Handled exactly
- like the heads, above. Can also
- result when a read operation will
- span many cylinders. The actual
- cylinder entered is tested against
- the selected value PLUS the sector
- count divided by the number of sectors
- in a cylinder PLUS 1. If the result
- would be greater, than the max cylinder
- count of the drive, the difference is
- truncated.
-
- ILLEGAL SECTOR COUNT .. results when less than zero or
- greater than 255 is entered. The
- program makes 0 equal 256, and
- <0 equal 1.
-
- A sample session follows:
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- Drive 0 selected automatically
- Select a cylinder between 0 and 819 ? 819
- Select a head (surface) between 0 and 9 ? 9
- Select a starting sector between 1 and 17 ? 1
- Select a number of sectors between 1 and 256 ? 17
- The following commands are available :
-
- re(Z)ero, (S)eek, (R)ead, (W)rite/read verify, (A)ll
-
- ENTER YOUR OPTION : ? a
-
- Now issuing the rezero (recal) command ......... command successful !
- Now issuing the seek command ................... command successful !
- Now issuing the read command ................... command successful !
-
- For your protection, this part of our show will only do the LAST SECTOR
- That will be ... cylinder 819 , head 9 , sector 17
-
- Now issuing the write command .................. command successful !
- Now issuing the read command to compare data ... command successful !
- Now comparing data ............................. data compared O.K. !
-
- Want another test ( y / n ) ?
-
-
-
-
- IMPORTANT NOTE : In the event of an error, the status and
- error registers are presented to the screen.
- An English interpretation of the HIGHEST
- PRIORITY ERROR will follow. If there is a
- real problem, such as an XT controller
- installed in the system, or a timeout error
- that "hangs" the controller, the status
- and error register values may be the same.
- The sector count, head number, and cylinder
- number are also displayed.
-
- Possible error codes listed below:
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- POSSIBLE ERROR CODES :
-
-
- ERROR PROBABLE CAUSE
-
- DRIVE NOT READY Improper drive select option on drive.
- TRACK 0 ERROR Drive not up to speed, or no seek
- complete signal received. Cable fault.
- Power the machine off and re-verify
- drive select option and cable connections.
-
- WRITE FAULT FROM DRIVE Improper drive type selected in SETUP.
- Above maximum cylinder number or head
- number was selected. Verify the drive
- type selected in SETUP.
-
- CONTROLLER STAYED BUSY No index signal was present from the
- INDEX STAYED ACTIVE drive. If this signal is missing, the
- controller will wait forever if a
- (R)ead command is selected. Power the
- machine off and re-verify drive select
- option and cable connections.
-
- DRQ FAILURE The controller either still has data
- that was unread or is waiting for
- data to write. If this persists, the
- controller is probably defective.
-
- BAD BLOCK ON DRIVE These are either unreadable or marked as
- DATA CORRECTED ON bad at format time. BE SURE THESE AREAS
- DRIVE ARE NOT USED. Use a format utility (WDFMT)
- UNCORRECTABLE DATA and enter these areas as bad. If the
- ERROR disk contains data, try to relocate the
- ID FIELD (address) cluster that contains this area using a
- NOT FOUND DOS disk utility. Verify that the drive
- type selected in SETUP matches the actual
- configuration of the hard drive, and
- that a low-level format was performed on
- the ENTIRE drive.
-
- ILLEGAL COMMAND The controller was unable to recognize
- the command you issued. This could be
- caused by incorrect jumper configuration
- on controller (check USER'S GUIDES
- section of this BBS). Also could be
- defective controller.
-
-
- IF PROBLEMS PERSIST ... 24 hour Technical Support number 1-800-777-4787
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