#115 format error in FAT32 kernel

[7shi]

Boot FAT32 kernel (ex. ke2041_86f32) from A: and "format b: /u", then an error occurs.

A:>format b: /u
Insert new diskette for drive B:
Press ENTER when the right disk is in drive...
Using drive default: 1440k (Cyl=80 Head=2 Sec=18)
Please enter volume label (max. 11 chars):
No label, disk will have no creation timestamp.
Full Formatting (wiping all data)
100 percent completed.
Preparing FAT area...
Drive_IO(WRITE 1, count 1 ) [FAT12/16] [drive B*]

Critical error during DOS disk access
DOS driver error (hex): 01
Description: unknown unit for driver
Program terminated.
[Error 129]

Format uses INT26, and this error occurs in kernel.
When "dir b:" before format, then this error does not occur.

[7shi]

I reply to the answer on the mailing list.
https://sourceforge.net/p/freedos/mailman/message/32031925/

Does this only happen with the FAT32 kernel?

Yes.

Does this only happen with a FreeDOS kernel?

Does it mean other DOS, for example, MS-DOS?
I've tested only with FreeDOS.

Are your A: and B: actually 2 distinct physical drives?

Yes, but not with a real machine. I've tested in QEMU.
I've created a boot floppy "fd1.img" with ke2041_86f32.

$ dd if=/dev/zero of=fd2.img bs=512 count=2880
$ qemu -fda fd1.img -fdb fd2.img

Starting SeaBIOS ...
(snip)
FreeCom version 0.82 pl 3 [Dec 10 2003 06:54:37]

A:\>format b: /u

Does this only happen with /U or also with other modes?

Without /U, only in first (unformatted) the error occurs.
With /U, always the error occurs.

Can you try with other FORMAT tools?

No, I don't know other FORMAT tools for FreeDOS.

If you do DIR B: before format, what will happen?
Is the disk already formatted before you format it?

[Unformatted]
A:\>dir b:
 Volume in drive B has no label
 Volume Serial Number is EF27-3654
File not found.

[Formatted]
A:\>dir b:
 Volume in drive B has no label
 Volume Serial Number is 3970-18E7
File not found.

Can you add the /D option to get more verbose messages?

I've attached the log.

[haruteru_f]

Hi All,
I tried other DOS.

1.DR-DOS 7.01.07 WIP (24.11.2004)
=> no problem
2.DR-DOS 8.0
=> no problem
3.Windows ME boot disk
=> no problem

[haruteru_f]

I try some case.
Thanks :-)
case1. DR-DOS 7.01.07 WIP (24.11.2004)
-> no problem
case2. DR-DOS 8.0
-> no problem
case3. Windows ME boot disk
-> no problem

All with the same FreeDOS FORMAT tool?
Then it might indeed be kernel-related.

Yes, all the same FreeDOS format.exe (byte size = 31216)

• "format.exe" version
  FreeDOS Format Version 0.91v
  Written by Brian E. Reifsnyder, Eric Auer and others.
  Copyright 1999 - 2006 under the terms of the GNU GPL, Version 2.