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1995-12-11
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Troubleshooting guide for Partition Resizer
===========================================
This document will help you to solve the most common problems you will face
when you use Partition Resizer. It is divided in two sections, which contain
several topics on various subjects. I hope it will help you the most.
1- Before you run Partition Resizer
1.1 Unmovable and system files
1.2 Defragmenting your partition
2- While you run Partition Resizer
2.1 Abnormal program interrupt
2.2 False interrupt warning
2.3 Error and warning messages and what you can do about them
2.4 Cmos operation failed
1- Before you run Partition Resizer
1.1 Unmovable and system files
These files may sometimes need special care. This is how you should handle
the most common system files:
IO.SYS: It doesn't have a problem with resizing or moving, but you
should not move it with defragmentation programs, otherwise
the system won't boot.
MSDOS.SYS: This file can be moved or defragmented as any ordinary file.
DBLSPACE.BIN: This file can be moved or defragmented as any ordinary file.
STACKVOL.*: These files can be moved or defragmented as any ordinary file.
386SPART.PAR: This file will be damaged if resized or moved. You'd better
remove it before resizing or moving, and recreate it when
you've finished.
MIRROR files: These files can be moved or defragmented as any ordinary file.
But they will be invalid when you change the partition, so
you'll have to rerun mirror after Partition Resizer's
finished.
Most system files won't be damaged if they are moved. If the files have no
special position in the disk, or they are fragmented, they can be moved or
defragmented as any ordinary file.
1.2 Defragmenting your partition
In order to use Partition Resizer to shrink a partition, you'll have to
defragment it first. This can be done with any defragmentation program that
performs a full optimization of the drive, like DOS 6.00 or later Defrag.
You will have to move ALL the files to the beginning of the partition
(including unmovable files). To move unmovable files, use ATTRIB to change
their attributes (-s -h -r). See the previous section for details on system
files. After you've finished with defrag, you may change the attributes back
to normal.
2- While you run Partition Resizer
2.1 Abnormal program interrupt
If you have a power shutdown or any other abnormal termination of the program
while Partition Resizer resizes or moves a partition, then you must rerun
the program immediately after rebooting. This will continue the job from
exactly where it stopped. The program output to the screen will show that
the job will start from the beginning, but it will not write anything to the
disk until it reaches the step at which it was interrupted. Partition resizer
will prompt you in this case, and you should answer yes when it asks you to
restore the interrupted work.
If the program hangs, and all you can do is reset your computer (most unlikely
but you never know), rerun the program, and the job will finnish normally.
2.2 False interrupt warning
There might be some cases that Partition Resizer will ask you to restore an
unfinished job, but you haven't had a program interrupt or anything like that.
In that case, Partition Resizer has found an older RESQUE.DAT file in the
current directory, which could not be deleted (for unknown reasons). You
should delete this file, but ONLY if you are sure that Partition Resizer has
finished its job successfully.
2.3 Error and warning messages and what you can do about them
Fatal error messages:
When a fatal error message appears, you will not be able to continue running
the program, unless the problem is fixed. The program will immediately exit
on a fatal message.
1: Bad partition chain: This error will appear if your partition chain
is invalid, meaning that some sectors in the partition do not have
the 0xAA55 signature. This error is fatal, and the program will exit
immediately. If you are able to access all your disk partitions, then
try to fix this with a disk editor (see PRESIZER.DOC for more
details).
2: Sector read failed: This error will appear when Partition Resizer is
unable to read a system sector. This can happen if Partition Resizer
is incompatible with the disk (I don't know if this can happen), if
the specified sector is damaged, or if disk information is erroneous.
The error is fatal, which means that the program will immediatelly
exit. If you know which disk causes the problem, you should disable
the disk to proceed.
3: Sector size other than 512 bytes: Partition Resizer is incompatible
with disks having sector size other than 512 bytes. If you want to
continue, disable this disk.
4: Cannot detect any drives: If Partition Resizer cannot detect any
hard drives through INT 0x13, it will exit. If you have a hard drive,
then you probably need a driver to access it, which is not loaded.
Error messages:
When an error message appears, you will be able to use the program, but you
won't be able to resize or move the partitions which have the problem.
1: DOS partition damaged or not formated: This error will appear if
you have any partitions that are described as DOS partitions but
are not formatted. It means that the program failed to find the
system signature (0xAA55) at the end of a DOS partition's boot sector.
If you're able to access all your partitions, then just add the
signature byte (0xAA55) to the end of the specific partition's boot
sector. If this error appears, you will be able to run the program
but the damaged partition will appear as incompatible (meaning that
you will not be able to resize it or move it).
2: Incompatible disk found: If this error message appears, then you will
not be able to resize or move any partitions on this disk. Partition
Resizer will try to read the first and the last sector on every disk.
If it fails, it means that the drive is incompatible with the standard
INT 0x13 read routine, therefore it is not reliable to work with it.
3: Starting / Ending cylinder / sector / head value is invalid: These
errors will cause the specified partition to appear as invalid. See
the technical details in PRESIZER.DOC for more information.
Warning messages:
These warning messages appear when the partitions on your disk have some
erroneous or unexpected information, but it is safe to ignore them in most
cases.
1: Bad filesystem id string / unknown filesystem type: This error will
appear when a partition is described as a DOS partition but it doesn't
have a valid FS signature. You may proceed if you find this warning.
2: Filesystem id incorrect: The FS signature is different from the
expected. You can safely proceed if you find this warning.
3: False sectors per track / head value in boot sector: The boot sector
contains erroneous information for disk heads and sectors per track.
You can ignore this message.
4: FAT signature bad or missing: The FAT signature is bad (not
0x[FF]FFFFF8). You should check this error, it could mean your FAT
is damaged. But Partition Resizer will allow you to continue, since
its working will not be affected by this.
5: Bad media descriptor (other than 0xF8): The media descriptor in the
boot sector is wrong (not 0xF8). You can ignore this message.
6: Total sectors in partition / Relative starting sector value incorrect:
This is an automatically fixed error. It will occur if the dword
entries for total sectors in partition or relative starting sector
values do not match the partition starting / ending data. You can
always ignore these warnings, since Partition Resizer won't use these
values.
7: Hidden sectors value incorrect: This warning means that the hidden
sectors value in the boot sector of a FAT partition is incorrect. If
you are able to access your partitions normally, you should ignore
this warning.
All these error messages will show you some more information, which might help
you to correct the problem. The "drive" value is the number of the physical
drive (80 for C:, 81 for d: and so on). The "sector" value is the absolute
sector number (first sector is sector 0) in the disk, where the erroneous
information appears. The "partition#" value, will tell you which partition
of the four described in the above sector contains the error. The "FAT
partition serial no." value is the serial number of the FAT partition that
has the error.
All info about the technical details can be found in section 3 of
PRESIZER.DOC.
If you can't find out what's wrong or if you cannot correct the problem by
yourself, don't hesitate to send me a letter or mail.
2.4 Cmos operation failed
If you get a message informing you that you cannot use cmos memory for the
reset protection system, you will be able to run the program normally, but
you won't be able to recover after an abnormal program interrupt. This
means that if the program does it's job and the power goes down suddenly,
you will LOOSE ALL THE DATA IN THE WORKING PARTITION! It's up to you then
whether you will use the program or not.
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