how can i fix this floppy disk problem

Microsoft Windows xp home edition with s...
January 4, 2012 at 11:55:49
Specs: Windows XP, pentium/512
floppy disk shows bad table on backup. floppies format ok but develop bad table when used for backup.
is a file corrupted & ,if so ,how do i fix it?



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January 4, 2012 at 12:02:21
When you format the floppy does it show all sectors were used? Floppies are delicate media. You should probably use new disks.

What are you backing up on floppies anyway? I suggest you use a more reliable media. Even flash drives are more reliable then floppies. I prefer CDR for small archiving.

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January 4, 2012 at 14:01:44
Hi Irv,

floppy's have very limited capacity, and I wonder if this is the cause of your problem.

You do not advice how you are attempting backup, or what you are backing up.

I think it would be better to use a usb pen-drive for this. These can have huge capacity and are really inexpensive now.

Please advise back on what you decide.

Good Luck - Keep us posted.

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January 4, 2012 at 18:01:44
Quickbooks pro asks for a floppy disk to backup your company files. At least older versions did.

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Related Solutions

January 6, 2012 at 05:10:28
i am backing up a dos program directly from the program itself [oms-a prof. dental program]

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January 6, 2012 at 05:23:48
You didn't answer all my questions.

If there are bad sectors on the disk then throw it away.

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January 6, 2012 at 05:56:07
Hi Irv,

as OtheHill says, you are not supplying enough detail and/or not answering the questions raised.

This week my crystal ball is on holiday!

Did the backup procedure work before?
If yes, has anything changed?

I still think capacity, and your reply suggests data records are being backed up, not just the dos program.

Good Luck - Keep us posted

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January 6, 2012 at 05:57:13
this happens with new disks too.
my formatted disks say the following:

1,457,664 bytes total disk space
1,457,664 bytes available on disk
512 bytes in each allocation unit
2,847 allocation units available on disk
12 bits in each fat entry

when backing up it will say 'bad table:
PKUNZIP:[W23]Warning file has bad table
PKUNZIP:[W15]Warning file fails CRC check.

i appreciate your help in this matter,

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January 6, 2012 at 06:00:24
the backup always worked.
just the data files are being backed up.
thanks again,

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January 6, 2012 at 06:26:59
The files you are trying to place on the floppy disk are corrupted. The disk is not your problem.

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January 6, 2012 at 07:37:12
Hi Irv,

the dos program PKUNZIP is for restoring, not backing up.

This reads the last disc (of the backup set) first, as the table of contents is there.

The dos program for backing up is PKZIP.

Good Luck - Keep us posted.

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January 6, 2012 at 09:26:47
how do i find which file [out of 50] is corrupt & how do i fix it?

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January 6, 2012 at 09:31:22
i use pkzip in the backup process & pkunzip to restore to my backup computer.
this is all done automatically by the program.the problem exists in the restoring
phase with pkunzip.
i suspect a corrupt file but i cant find it.

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January 6, 2012 at 15:53:32
So, you have 50 files all compressed into one zip file? See the links below.

Googling the phrase “file has bad table” Yields many hits. Some are linked below.

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January 7, 2012 at 00:55:05
Irv - surely you could have advised all this in the first post.

Even now you are not providing full details, such a why a restore is being attempted.

e.g. Are you trying to move the dental system to another computer?

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January 7, 2012 at 17:01:18
yes.. as a backup on my home computer.

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January 11, 2012 at 08:46:14
Hi Irv,

be warned, my next step will be placing red hot needles under your toenails to extract *FULL * details of your problem. Note this is the 16th response to your original question.

It now appears you are setting up a duplicate system on another computer. This is not a backup as such.

The dental system itself is very old (must be if dos), as is the copying method, again being dos programs - PKZIP/PKUNZIP. When written, none of these were that forward compatible. e.g. quite possibly only dot-matrix printers are supported.

I would look at the os and disk format method on both source and target computers. Suspect the target hdd cannot be written to by PKUNZIP, because it is formatted differently to that of the source hdd.

Regarding backup security, for a commercial system, I would have rotating daily backup sets for each day used (e.g. Mon to Fri, or Mon to Sat) . Keep offsite if possible.

Also test they restore properly, before needing in earnest and finding it fails.

There is nothing to stop you setting up your own backup to an usb stick

Good Luck - Keep us posted.

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