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1992-09-22
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386DISK and QCACHE
──────────────────
Included with 386MAX and BlueMAX are two additional utilities - 386DISK and
QCACHE. 386DISK is a 'RAM disk' which allows files to be copied into a
virtual drive contained in memory, while QCACHE, as its name implies, is a
disk caching program which increases system performance by decreasing the
number of disk reads made to the hard drive.
Using 386DISK
-------------
To install 386DISK, simply insert a device line in the CONFIG.SYS file
which reads:
DEVICE=C:\<PATH>\386DISK.SYS DISK_SIZE SECTOR_SIZE DIR_ENTRIES OPTION
where:
* <PATH> is the path to the 386DISK.SYS driver
* DISK_SIZE is the size of the virtual disk in KB
* SECTOR_SIZE is the desired number of bytes in each sector
* DIR_ENTRIES is the desired number of directory entires in the root
directory
* OPTION specifies the type of memory in which to configure the virtual drive.
Possibilites include /EMS for expanded memory, /EXT for extended
memory, and /XMS for extended memory via XMS Extended Memory
Blocks (EMBs)
To create a 1MB virtual disk using XMS memory with 512 byte sectors and 64
directory entries, simply insert the following line in CONFIG.SYS:
DEVICE=C:\386MAX\386DISK.SYS 1024 512 64 /XMS
Troubleshooting 386DISK
───────────────────────
If you are experiencing problems when loading 386DISK, verify that you have
sufficient resources to load the virtual drive. Versions of 386MAX prior
to version 6.0 will require the user to reserve extended memory for 386DISK
by using the EXT= option in the 386MAX.PRO file if the virtual drive is
configured to use extended or XMS memory. For more information about
386DISK, consult the 386DISK.DOC file included with 386MAX and BlueMAX.
Using QCACHE
────────────
QCACHE is a disk cache utility licensed from PCKwik Corp (formerly
Multisoft). Though QCACHE shares some of the functionality of PCKwik's
SuperPCK cache, QCACHE lacks the advanced features of commercial caches.
The default behavior for QCache is to replace SMARTDRV.SYS and use the same
amount of memory currently being used by Smartdrive (up to 2MB). If you
wish to install QCache in a system not currently using Smartdrive, place
the statement
d:\[path]\qcache
in your AUTOEXEC.BAT, where d: is the drive and [path] is the directory in
which QCache is located. For example, to install a 1 MB disk cache using
XMS memory, and lending active at 512 KB, place the following line in
AUTOEXEC.BAT:
d:\[path]\QCache /S:1024 /L:512
Qcache should be loaded BEFORE any shell you may be using. If you are using
Windows 3.0, be sure to load QCACHE.WIN in your CONFIG.SYS to provide the
necessary interface.
By default the track buffers for Qcache are loaded into low DOS memory to
provide additional stability in certain volatile environments. Loading the
track buffers does use some conventional memory, however, this is usually
limited to 8-10 KB.
The following parameters are valid when loading QCache:
/*+ Enable cache hit indicator
/5- Allow track buffer to be loaded high along with the rest
of the cache
/B+ Batch copy to/from cache
/C+ Use conventional memory
/EM Use extended memory; minimize use of conventional memory
/G+ If boot sectors contradict BIOS, use boot info
/I+ Display drive table during installation
/K+ Wait for keyboard response after any warning messages
/L:nnnn Lend nnnn KB to other applications
/Mn+ Enable measurement pop-up
n=1 Use ALT-SHIFT
n=2 Use CTRL-ALT-SHIFT
/P Display parameters in effect
/R:nnnn Reserve nnnn KB for applications
/S:nnnn Allocate nnnn KB for cache
/T+ Read the rest of the track
/&U+ Load into UMB memory
/V+ Use volume change detection hardware
/-x Do not cache drive x
You may use these parameters while QCache is loaded:
/? Display post parameter listing
/F Flush cache
/M Displays cache measurements
/P Display parameters in effect
For additional information concerning QCACHE, consult the 386MAX/BlueMAX
Reference Guide.
----------
Qualitas, Inc. Main : (301) 907-6700
7101 Wisconsin Avenue Sales : (800) 733-1377
Suite 1386 FAX : (301) 907-0905
Bethesda, MD 20814-4805 BBS : (301) 907-8030
CompuServe : 75300,1107
MCI Mail : 336-2907
----------
386MAX, BlueMAX, and MOVE'EM are trademarks of Qualitas, Inc.
All company names and products are trademarks or registered trademarks
of their respective companies.