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- This README file accompanies the CACHEFIX.NLM patch file for NetWare 386
- v3.10 Rev A. The following file is included for this patch:
-
- CACHEFIX NLM 1189 10-29-90 5:05p
- PATCHMAN NLM 4174 10-29-90 12:51p
-
- CACHEFIX is a semi-static patch which is loaded at the file server console
- as a NetWare Loadable Module. Under heavy usage when data is read
- immediately after it is written to cache, the data read could result in the
- return of erroneous data. If cached data is read and rewritten to cache,
- the corruption would be saved to disk. If the data is not changed in cache,
- the data will be saved correctly. This problem exists primarily with random
- access applications (for example, database servers).
-
- To implement this patch, the NetWare 386 Patch Manager (PATCHMAN.NLM) must
- first be loaded.
-
- Three types of patches can be managed with PATCHMAN: dynamic, semi-static,
- and static. Dynamic patches are .NLM files that can be loaded/unloaded while
- the server is running. Unloading a dynamic patch will restore the Operating
- System to its original "un-patched" state. Semi-static patches can also be
- loaded while the server is running, but they cannot be unloaded. It is not
- possible to undo the effects of a semi-static patch without first downing the
- server and bringing it back up without loading the semi-static patch. A
- static patch is a DOS executable program that makes changes to the SERVER.EXE
- file. This type of patch is applied once and its effects are permanent. It
- is suggested that static patches be applied to a copy of the SERVER.EXE file,
- not the original file.
-
- Dynamic and semi-static patches modify the Operating System in memory, not
- on the disk. This means that dynamic and semi-static patches must be loaded
- each time the Operating System is brought up in order for any "fixes" to take
- effect. It is recommended that the command "LOAD <patch>" be placed in the
- file server's AUTOEXEC.NCF file to ensure that the patch is always in effect
- when the server is initially brought up. Typing MODULES at the server
- console will show which dynamic patches have been loaded, but will not show
- semi-static or static patches.
-
- The Patch Manager (PATCHMAN.NLM) must be loaded before any dynamic or semi-
- static patches can be loaded. If PATCHMAN is not already loaded, the
- <patch>.NLM will attempt to locate PATCHMAN and, if found, will load it
- automatically. PATCHMAN only needs to be loaded once; all .NLM patches can
- then be loaded. PATCHMAN cannot be unloaded until all patches that rely on
- it are first unloaded.
-
- To implement this patch:
-
- 1) Copy PATCHMAN.NLM and the patch .NLM file to the same directory as the
- other NLM files on your system (SYS:SYSTEM is suggested).
-
- 2) After the system is brought up, type LOAD PATCHMAN at the console.
-
- 3) LOAD the patch .NLM file.
-
- NOTE: This patch and PATCHMAN.NLM will only operate on NetWare 386 v3.10a.
- Future versions of NetWare 386 will require a version of PATCHMAN
- specific to that release.
-
- *****************************************************************************
- DISCLAIMER
-
- Novell, Inc. makes no representations or warranties with respect to this
- software patch, and specifically disclaims any express or implied warranties
- of merchantability or fitness for a particular purpose. Novell's intentions
- for this software patch is to provide a temporary work-around to the
- anomalies described in this file. Such work-arounds are typically addressed
- in future releases of NetWare.
- Novell will not be responsible for any data loss that may result from
- implementing this patch. Novell strongly recommends a backup be made before
- any patch is applied. Technical support for this patch is provided at the
- discretion of Novell.
- *****************************************************************************