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- User Documentation EZDIAG.EXE Page no. 1
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- USER DOCUMENTATION
-
- WESTERN DIGITAL USER DIAGNOSTICS
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- This document is intended to accompany the utility EASYDIAG.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.
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- 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.
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- 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.
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- A sample of the start-up screen follows:
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- User Documentation EZDIAG.EXE Page no. 2
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- System contains the following :
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- 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) ...
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- Drive Cylinders Heads Precomp cyl Landing zone Sectors/track
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- 0 820 10 65535 820 17
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- Total formatted capacity of drive 0 is 71,372,800 bytes
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- If the above information is not correct, run your system's setup utility
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- The following diagnostic will use the configuration information above
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- 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.
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- You can proceed to the controller/drive diagnostic by typing
- 'y' now. No return is necessary. The following menu appears:
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- User Documentation EZDIAG.EXE Page no. 3
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- Select the diagnostic mode desired
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- (A)utomatic Quick Test ..........
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- (U)ser Selected Advanced Test ...
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- (E)xit to DOS / END TEST ........
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- ... ENTER YOUR OPTION ... ==>
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- Explanation of options on following page :
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- User Documentation EZDIAG.EXE Page no. 4
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- (A)utomatic Quick Test ... Operation
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- A really fast and thorough test of the controller/drive subsystem.
- The following repetitive commands are issued :
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- 1) Rezero (recalibrate) command is issued to the
- controller. The purpose of this command is to
- simply move the hard drives' data heads over
- the very first cylinder. The drive must then
- respond with DRIVE READY, SEEK COMPLETE, and
- TRACK ZERO signals all present. The following
- errors can occur :
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- REZERO (RECALIBRATE) COMMAND ERROR LIST
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- NO SEEK COMPLETE FROM DRIVE ...... --- OR ---
- DRIVE NOT READY ERROR ........... The drive never
- reported that it was ready, or that the requested
- seek (to track zero) was complete. This is usually
- a drive select jumper or termination option (see the
- drive's installation manual for more details) if the
- drive activity lamp never lit when the controller was
- trying to access the drive. Can also be a wrong, mis-
- installed, or a defective cable. If the drive never
- came to full speed (due to mechanical or power supply
- limitations) this is also the error you will see.
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- TRACK ZERO ERROR ................ The drive reported
- that it was READY, and failed for some reason to reach
- the first cylinder. This is usually either a termination
- option problem, or a defective hard drive.
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- CONTROLLER STAYED BUSY .......... This error can be
- caused by failure of the controller to receive INDEX
- (revolution) pulses from the hard drive. This input
- is necessary for the timeout mechanism to function
- properly on the controller. Try a known, good drive
- and cable set. If the error persists, the controller
- is probably bad.
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- User Documentation EZDIAG.EXE Page no. 5
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- 2) 256 RANDOM SEEKS are issued all over the drive.
- The drive does not have to be formatted to pass
- this test. This is a thorough test of the
- mechanics of the hard drive. A failure here will
- probably be reported as a NO SEEK COMPLETE or
- a NO DRIVE READY error. If the power supply in
- the system under test is not capable of supplying
- sufficient current to operate the drive, it will
- usually show up as a drive error. If the wrong
- number of cylinders or are selected in the
- SETUP program (supplied with the machine), an
- error listed above or a WRITE FAULT error will
- be displayed. The errors possible follow :
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- a) NO SEEK COMPLETE .......... Covered above
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- b) DRIVE NOT READY ........... Covered above
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- c) WRITE FAULT ................ Beyond maximum
- cylinder number seek was attempted. Check your
- drives' parameters and your machine's SETUP.
- Could also be a defective drive.
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- User Documentation EZDIAG.EXE Page no. 6
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- 3) Now to the meat of it. 256 RANDOM TWO SECTOR
- READ commands are issued to the drive. The
- randomness of the location selected combined
- with the deliberate selection of 2 sectors
- (blocks) of data requested was carefully chosen
- to bring out the elusive "random" failures.
- The controller is told to NOT RETRY any operation
- that resulted in an error. The possible errors
- that could be reported are :
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- RANDOM READ POSSIBLE ERROR DESCRIPTION
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- a) DRIVE NOT READY ............. Covered above
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- b) WRITE FAULT ................. Covered above
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- c) DATA REQUEST FAILURE ........ A severe and
- total controller failure. The card either
- never transferred data, or won't quit
- transferring data.
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- d) BAD BLOCK ON DRIVE .......... This area was
- previously marked on drive. This location
- should appear on the drive's error log. This
- error is displayed solely for confirmation.
- No automatic or combination tests are aborted
- if this error is encountered.
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- e) ID FIELD (address) NOT FOUND . The controller
- was unable to find any understandable data
- on the hard drive. Check to ensure the drive
- has been FORMATTED, the SETUP is correct, and
- the ERROR MAP on the drive does not have this
- location listed as a BAD TRACK.
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- f) UNCORRECTABLE or CORRECTABLE DATA ERROR
- Indicates this location should be marked as
- a BAD TRACK with a LOW-LEVEL FORMAT utility.
- Such a utility can be found on this BBS. It is
- called WDFMT.EXE and will format, verify, and
- perform an intensive surface scan of the drive.
- Unless you format out marginal areas, the data
- you store on the drive could eventually be
- corrupted THE NEXT TIME IT IS READ. Play it
- safe. THERE ARE VERY FEW DEFECT FREE DRIVES !!!
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- User Documentation EZDIAG.EXE Page no. 7
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- 4) NOW WE REALLY GET TOUGH ! A random data pattern
- WRITTEN / READ / and VERIFIED on the LAST PHYSICAL
- SECTOR of the drive as defined in SETUP. This
- location was chosen because operating systems
- (and hence application programs) RARELY access the
- last sector on the drive. Even if this sector was
- able to be addressed in the machine's operating
- system, you would have to be using EVERY BYTE on
- the drive (within 512 bytes of full). This is rare.
- Some errors that can exsist :
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- RANDOM DATA WRITE/READ/COMPARE ERROR DESCRIPTION
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- a) WRITE FAULT FROM DRIVE ...... Covered before
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- b) DATA REQUEST FAILURE ........ Covered before
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- c) DATA COMPARE ERROR .......... A difference
- between the WRITE data and the READ data
- was discovered. You need to replace this
- controller.
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- d) ID FIELD (address) NOT FOUND . Covered above
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- e) UNCORRECTABLE/CORRECTABLE DATA ERROR
- Covered above.
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- f) DRIVE NOT READY .............. --- OR ---
- NO SEEK COMPLETE ............. Covered above
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- g) BAD BLOCK on drive ........... Covered above
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- Sample screen follows ...
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- User Documentation EZDIAG.EXE Page no. 8
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- (A)utomatic quick test in progress ... please stand by ...
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- Now issuing the rezero (recal) command ......... command successful !
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- Now issuing 256 random seeks ................... command successful !
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- Now issuing 256 two sector random reads ........ command successful !
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- Now issuing 50 random data write/read verifies . data compared O.K. !
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- Automatic quick test completed flawlessly !
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- CONGRATULATIONS on a successful installation !
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- (U)ser Defined Advanced Test ... Next Section ...
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- User Documentation EZDIAG.EXE Page no. 9
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- (U)ser Defined Advanced Test ... Operation
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- This disk diagnostic is useful for a problem installation,
- or to verify absolute disk addresses in the event of a disk
- error later.
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- 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:
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- drive = 0
- cylinder = 0
- head = 0
- sector no. = 1
- sector count = 1
- command = re(Z)ero
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- The currently supported commands are :
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- re(Z)ero ....... recalibrates drive to cylinder 0
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- (S)eek ....... positions drive to any cylinder
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- (R)ead ....... transfers data from drive starting
- at location chosen, and continues
- for duration of sector count
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- (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.
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- (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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- User Documentation EZDIAG.EXE Page no. 10
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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.
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- IMPORTANT NOTE : Illegal disk addresses have been screened
- for, and the following is how the program
- handles them.
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- 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.
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- ILLEGAL HEAD NUMBER : results when a head number greater
- than ONE LESS THAN THE BIOS VALUE
- is selected. Head numbers are truncated
- at one less than the BIOS value.
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- 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.
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- ILLEGAL SECTOR COUNT .. results when less than zero or
- greater than 256 is entered. The
- program makes >256 equal the value
- entered AND 255, and makes 0 equal 1.
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- A sample session follows:
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- User Documentation EZDIAG.EXE Page no. 11
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- (U)ser Defined Advanced Test ... Sample Screen
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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 :
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- re(Z)ero, (S)eek, (R)ead, (W)rite/read verify, (A)ll
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- ENTER YOUR OPTION : ? a
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- Now issuing the rezero (recal) command ......... command successful !
- Now issuing the seek command ................... command successful !
- Now issuing the read command ................... command successful !
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- For your protection, this part of our show will only do the LAST SECTOR
- That will be ... cylinder 819 , head 9 , sector 17
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- Now issuing the write command .................. command successful !
- Now issuing the read command to compare data ... command successful !
- Now comparing data ............................. data compared O.K. !
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- Want another test ( y / n ) ?
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- 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.
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- ERROR CODE SUMMARY FOR ALL TESTS SAME AS IN PRECEEDING SECTION
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- IF PROBLEMS PERSIST ... 24 hour Technical Support number 1-800-777-4787
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