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1200.TXT
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1991-12-31
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Document 1200
SUPERSTOR
Description:
Using SuperStor Disk Compression
Installation Tips
The DR DOS 6.0 version of SuperStor recognizes and will operate
correctly on SuperStor partitions created with the AddStor
retail SuperStor version 1.3. The DR DOS 6.0 version of
SuperStor was not designed to be compatible with other operating
systems and should not be expected to work properly except with
DR DOS 6.0.
Before using SuperStor, backup the data on the drives to be
compressed. If there is a power failure during the compression,
some data could be lost.
SuperStor requires that a config.sys file be present on the
bootable drive to run properly. If you do not have a config.sys
file, you can create one using the DR DOS 6.0 Editor. Use the
DR DOS "DEVICE=" statement to load the SSTORDRV.SYS driver.
SSTORDRV.SYS will automatically move into upper memory (through
the use of XMS UMBs) if space is available. This is true
regardless of whether the XMS UMBs are allocated by the DR DOS
6.0 operating system or by a third party memory manager.
Determine the maximum amount of uncompressed space you want to
leave on the disk. Note that a Windows 3.0 permanent swap file
cannot reside on a compressed volume. The actual amount left
uncompressed will depend on the data compression ratio and the
disk space available before the compression was done (in other
words, SuperStor will use as much space as necessary to compress
all of your files).
If you are using a disk partitioning utility or removable drive
that requires a device driver, you might need to experiment to
determine if that driver should come before or after
SSTORDRV.SYS in your config.sys file. The following list is in
the correct loading sequence for some of the more common of
these device drivers:
*DiskManager or SpeedStor partitioning utility drivers should be
loaded before SSTORDRV.SYS.
*The Bernoulli RCD.SYS driver must be loaded before
SSTORDRV.SYS; also, to use SuperStor on a bootable Bernoulli
cartridge, the RCD.SYS driver must be on an uncompressed
partition.
*The Plus Hardcard driver must be loaded after SSTORDRV.SYS.
Many customers make a backup bootable floppy diskette in case of
unexpected problems such as a hard disk controller failure.
After creating a SuperStor partition, be sure you update the
config.sys file on your backup bootable floppy to include the
SuperStor driver (and DEVSWAP.COM, if required), and copy these
files onto the bootable diskette.
SuperStor should typically not be used on a network server,
however it will work as designed on a workstation drive.
Troubleshooting SuperStor
The largest partition you can create with SuperStor is 512
Mbytes, using a physical partition of 256 Mbytes. If you have a
partition larger than 256 Mbytes, you will need to back up your
data and use the FDISK utility to create smaller partitions
before creating a SuperStor volume.
Some customers have reported difficulty installing SuperStor
onto a second physical hard drive. This might occur if DOS
operating system files are present. Because system files are
hidden, a DIR listing will not detect them. Use the command
XDIR I*.* to determine if the files IBMBIO.SYS or IBMDOS.COM are
present. If they are, use the ATTRIB command to remove the
system and hidden attributes, then remove or rename the system
files.
Note:
Do not remove or rename these files on your first physical hard
drive.
If you accidentally remove the SuperStor partition while the DR
DOS 6.0 DELWATCH utility is active, you might be able to
undelete the SuperStor partition file, thus restoring the
SuperStor partition.
If you use a third party disk optimizer on a SuperStor
partition, data should not be lost or corrupted. However,
because the third party optimizers might not properly recognize
the structure of the SuperStor partition, they might actually
cause worse fragmentation than that which existed prior to the
optimization process. Therefore, we recommend that you use the
DR DOS 6.0 DISKOPT utility, which will properly handle the
SuperStor partition.