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Bug#730871: general: Filesystem? Some problems with sizes of files.

Package: general
Severity: important

Dear Maintainer,

When I copied 15.2G file to free 64G flash, I've encountered the next error:

root@home-desktop:~# cp backup272291.tar /media/84D0-F52A/
cp: запись «/media/84D0-F52A/backup272291.tar»: Файл слишком
cp: не удалось расширить
«/media/84D0-F52A/backup272291.tar»: Файл слишком велик

(Cannot "expand" the file, it's too big). Here is the source file properties:

root@home-desktop:~# ls -l backup272291.tar
-rw-r--r-- 1 root root 15195166720 ноя 30 18:30 backup272291.tar

And here is the result of "df -h" (after unsuccessful try to copy):

root@home-desktop:~# df -h
Файловая система
Размер Использовано  Дост Использовано%
Cмонтировано в
rootfs                                                   106G          60G
41G           60% /
udev                                                      10M            0
10M            0% /dev
tmpfs                                                    254M         680K
253M            1% /run
/dev/disk/by-uuid/bc250faf-ac7a-46e0-a5a9-a456790ab1ff   106G          60G
41G           60% /
tmpfs                                                    5,0M            0
5,0M            0% /run/lock
tmpfs                                                    1,5G            0
1,5G            0% /run/shm
/dev/sdb1                                                 60G         4,1G
56G            7% /media/84D0-F52A

(Only 4.1G of 60G is filled on /dev/sdb1 now).
My LXDE filemanager (pcmanfm) declares, that size of the file on flash is 4.3G,
but its size "on the disk" is more then 137G. What does it mean and how is it
possible for 64G drive? And what is the operation "to expand the file" which is

It's not the problem only of this flash drive. In properties of many files on
harddrive I see, that their sizes "on the disk" exceed their real sizes ten
times or something about.

It's actually critical problem, because now  I can use only about 10-20% of
disk space. I hope you help me.


-- System Information:
Debian Release: 7.2
  APT prefers testing
  APT policy: (600, 'testing'), (500, 'stable-updates'), (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 3.2.0-4-686-pae (SMP w/2 CPU cores)
Locale: LANG=ru_RU.UTF-8, LC_CTYPE=ru_RU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

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