Package: mtools
Version: 4.0.31-1
Severity: minor

I have a script that uses mtools to create a FAT partition and it has
stopped working with recent mtools versions:


+ dd if=/dev/zero of=img.tmp bs=512 count=100031
100031+0 records in
100031+0 records out
51215872 bytes (51 MB, 49 MiB) copied, 0,0473954 s, 1,1 GB/s
+ mformat -i img.tmp
+ mcopy -i img.tmp -sb /usr/share/common-licenses ::
Internal error, size too big
Streamcache allocation problem:: 4


This worked with 4.0.26-1 (currently in testing). It also works
without the -b flag. The -b flag is described as an optimization, so a
simple workaround for anyone affected is to stop using -b.


-- System Information:
Debian Release: 11.0
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386, armhf, armel

Kernel: Linux 5.10.0-7-amd64 (SMP w/32 CPU threads)
Locale: LANG=en_DK.UTF-8, LC_CTYPE=en_DK.UTF-8 (charmap=UTF-8) (ignored: LC_ALL 
set to en_DK.UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages mtools depends on:
ii  libc6  2.31-12

mtools recommends no packages.

Versions of packages mtools suggests:
pn  floppyd  <none>

-- Configuration Files:
/etc/mtools.conf changed:
drive a: file="/dev/fd0" exclusive
drive b: file="/dev/disk/by-id/usb-MITSUMI0_MITSUMI0" exclusive
drive m: file="/var/lib/dosemu/hdimage.first" partition=1 offset=128
drive n: file="/var/lib/dosemu/fdimage"


-- no debconf information

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