USB key with 7.5 GByte but no space left on device after 4 GByte written

Kevin Kinsey kdk at
Thu Mar 5 09:07:28 PST 2009

Matthias Apitz wrote:

> to end this threat, I did:
> # dd if=/dev/zero of=/dev/da0 bs=64k count=1
> # newfs_msdos /dev/da0
> # mount -t msdosfs /dev/da0 /mnt
> # time cat file file file > /mnt/big
> cat: stdout: File too large
> 0.276u 19.421s 14:36.63 2.2%    11+1180k 33887+65536io 0pf+0w
> # df -kh /mnt
> Filesystem    Size    Used   Avail Capacity  Mounted on
> /dev/da0      7.5G    4.0G    3.5G    53%    /mnt
> i.e. it writes the maximal file size of 4G in FAT32 and 3.5G are left as
> free;
> the write speed is
> 4294963200 in 14:36.63 minutes, i.e. 4902926 per sec;
> 	matthias

Probably I'm just making more noise; you didn't give any
hardware details.  Some manufacturers (I have a SanDisk
Cruzer) are now putting multiple partitions on a flash stick;
the Cruzer has one which, on Windows,emulates a CD-ROM drive
(dunno why a CD emulation would take up 3.5 GB, tho).

Kevin Kinsey
It is sweet to let the mind unbend on occasion.
		-- Quintus Horatius Flaccus (Horace)

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