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3702.TXT
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1993-08-19
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7KB
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151 lines
_________________________________________________________________
STACKER NOTE STACKER NOTE
CHECK I/O ACCESS DENIED ERROR 27
(Applies to Stacker 2.x and Stacker 3.x for Windows & DOS )
STAC FAX 3702 (08/19/93)
_________________________________________________________________
BACKGROUND
If you received this error while checking your Stacker drives,
you may have corrupt data in the File Allocation Table (FAT). The
errors could be caused by:
Bad sectors on the underlying uncompressed drive
An errant program that writes data incorrectly and destroys
part of the File Allocation Table (FAT)
A program that incorrectly uses Expanded Memory Specification
(EMS)
SOLUTION
To correct this error:
Determine which areas of your hard drive have been damaged
Correct the damaged, unreadable areas
First, remove STACVOL attributes
The first step is to clean boot your system and remove the
hidden, system, and read-only attributes from the STACVOL file.
Determine which version of Stacker you have installed on your
computer. Then select the appropriate procedure from the
following chart.
FOR STACKER 3.1 AND MS-DOS 6
1. Hold down the F5 key while you restart the system on drive C.
2. From the prompt, type:
ATTRIB -H -R -S drive:\STACVOL.* <Enter>
where drive is the letter of the drive you are repairing.
FOR STACKER 1.X, 2.X, AND 3.0 (NO MS-DOS 6)
1. Copy ATTRIB.EXE from the \DOS directory to the uncompressed
portion (host drive) of the Stacker drive.
2. Restart the computer using a system disk in drive A.
3. Change to drive C.
4. From the prompt, type:
ATTRIB -H -R -S drive:\STACVOL.* <Enter>
where drive is the letter of the drive you are repairing.
Second, run the surface scan
Standard disk repair utilities such as Norton Utilities Norton
Disk Doctor, PC Tools DiskFix, or SpinRite, can detect the
damaged areas and correct them. This procedure works with all
standard disk repair utilities.
Run the disk repair utility's surface scan on the physical drive
containing the STACVOL file. Eliminate other device drivers
resident from memory before running the surface scan.
1. Run the disk repair utility on the damaged drive. Allow it to
repair any defective areas on the disk.
2. Remove all disks from the floppy drives and restart the
computer.
3. Run the Stacker command CHECK /F (for version 3.0 or greater)
or SCHECK /F (for version 2) on the compressed drive.
If there are no errors, the drive is repaired, and you can resume
normal use of the drive.
IF YOU STILL HAVE ERRORS
If you still cannot repair the Stacker drive, there are two
additional procedures you can try before resorting to removing
the damaged drive and starting over: removing write protection,
and removing the /EMS parameter.
Removing write protection
To remove write protection, determine which version of Stacker
you have installed on your computer. Then follow the appropriate
procedure below, where "x:" indicates the drive letter of the
compressed drive:
FOR STACKER 3.0 OR 3.1 FOR STACKER 2.X
Type: Type:
check /=w x: <ENTER> scheck /=w x: <ENTER>
Warning: This command produces a message stating that the
read-only status of this drive has been cleared. Do not
interpret this to mean that you can resume normal use of the
drive; doing so prematurely will result in data loss.
Instead, you must complete the steps outlined below. Never
use (S)CHECK /=w to remedy other write-protect situations.
Complete the following steps in order:
1. Run a disk repair utility, such as Norton Disk Doctor or PC-
Tools DiskFix, to repair as much of the drive as possible.
2. Run CHECK /F (or SCHECK /F) again.
Follow the instructions to repair the drive. When prompted
to perform a disk surface test, respond "yes," and delete
the damaged files.
When CHECK (or SCHECK) and the disk repair utility report no more
errors, the drive should be fully repaired. If errors persist,
disable Stacker's use of EMS.
Removing the /EMS parameter
Persistent errors indicate that the drive's FAT is damaged. Some
programs use expanded memory improperly. A program's
undisciplined use of the EMS page frame can corrupt the FAT. If
this is the case, you can prevent further corruption by disabling
Stacker's use of EMS memory.
Determine which version of Stacker you have installed on your
computer. Then select the appropriate procedure from the
following chart to disable Stacker's use of EMS memory.
FOR STACKER 3.1 AND MS-DOS 6
1. From the DOS prompt, type:
STACINI x: <ENTER>
where x is the uncompressed boot drive.
2. Use the arrow keys to move the cursor to a line containing
/EMS.
3. Use the DEL key to remove the switch.
4. Press CTRL + Z to save the change.
5. Restart your computer.
FOR STACKER 1.X, 2.X, AND 3.0 (NO MS-DOS 6)
Use any text editor to open your CONFIG.SYS file and delete /EMS
from the STACKER.COM device driver line.
If errors persist, the drive's FAT may be damaged beyond repair.
The only solution is to delete the drive with the damaged FAT and
start over.
Deleting the damaged drive and starting over
1. Back up the data on the drive.
2. Use the Stacker command REMOVDRV (for version 3.0 or greater)
or SREMOVE (for version 2.0) to delete the damaged drive.
3. Restart the computer.
_________________________________________________________________
Copyright 1993, Stac Electronics