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- Number: A2TH080290U247
- Subject: Problem With WD1007A BIOS
- Date: September 4, 1990
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-
- GENERAL
- INFORMATION: This is a letter from the IMSP group. The letter was
- dated January 10, 1990.
-
- Jan. 10, 1990
- Author: Russ White
- Western Digital
-
- PROBLEM: A bug was identified with BIOS revisions 2.1 and 2.2 of
- the WD1007A and 1.51 of the WD1007V when installing
- Novell NetWare 286. This problem has been corrected
- in revision 2.3 of the 7A and revision 2.2 of the 7V.
- This does not mean that earlier versions of the BIOS
- will not work with Novell. However one should be aware
- of the danger when installing a second drive or entering
- the BIOS after the Novell installation is complete.
-
- During the BIOS installation routines, a Novell compatible
- bad block list is created. A signature is placed in
- sector 16 of the boot track to notify the Novell
- installation software that a bad block list exists.
- This change was made to alleviate a bug in the Novell
- COMPSURF utility that would cause it to fail when 14
- errors are encountered (not previously marked in the
- Novell bad block list). By identifying most of the media
- defects during the BIOS installation the COMPSURF should
- pass without the end user having to restart it every 14
- errors.
-
- The problem with the earlier versions of the BIOS is that
- after the Novell installation is complete, sector 16 of
- the BOOT track is used for file allocation. When the
- BIOS is entered to install a second drive, upon exiting,
- it would rewrite the signature of the first drive and
- corrupt the Novell partition!
-
- SOLUTION: To correct this problem the new BIOS will only write the
- Novell signature if a low level format has been run
- during the current BIOS session. This implies that the
- defect list should be entered and/or the Surface Analysis
- run before exiting the BIOS. If you exit the BIOS then go
- back to the BIOS and run the Surface Analysis, it will
- place test patterns over the Novell information.
-
- The following steps should be taken when installing
- Novell NetWare on a two drive installation with earlier
- versions of the BIOS.
-
- Solution 1
-
- When configuring a new Novell installation for 2 drives:
-
- 1) Low level format drive 0.
- 2) Enter the drive manufacturer defect list for drive 0
- (and/or surface verify)
- 3) Low level format drive 1
- 4) repeat step 2 for drive 1
- 5) set drive types and exit.
-
- Solution 2
-
- When adding a new drive to an existing Novell installation
-
- 1) Disconnect the existing Novell drive first
- 2) Connect the new drive as in a single drive configuration.
- 3) low level format
- 4) enter the drive manufacturers defect list for drive 0
- (and/or surface verify)
- 5) Set drive type and exit.
- 6) Power down and install the original drive as drive 0 and
- the new drive as drive 1
- 7) Boot the system Setup utility
- 8) Set both drives to TYPE 1
- 9) Continue with the normal NetWare installation
-
- 1007A BIOS Cross reference
- Release Number Rev x=don't care
- 62-000217-xx1 1.0 ;did not support Novell defect list
- 62-000217-xx2 1.1 ;did not support Novell defect list
- 62-000217-xx3 2.1 ;Tech. Note applies.
- 62-000217-xx4 2.2 ;Tech. note applies
- ??-??????-??? 2.3 ;Fixed Novell problem
-
- 1007V BIOS cross reference
- Release Number Rev
- 62-000279-xx0 1.51 ;Tech. Note Applies
- 62-000279-xx1 2.20 ;Fixed Novell problem
-
- (X) This information was verified by Engineering.
-
-