On Thu, 30 Nov 2006, Dave Korn wrote:
> Hi all,
>
> I'm trying to use dd to dump stuff to a usb flash drive (i.e. mass
> storage device). However something tricks it into thinking the device
> is full (/dev/sdb is the pendrive):
>
> [EMAIL PROTECTED] ~
> $ dd if=/tmp/msd-test-data.cXoEqa2332 of=/dev/sdb bs=100 count=1
> dd: writing `/dev/sdb': No space left on device
> 1+0 records in
> 0+0 records out
>
> [EMAIL PROTECTED] ~
> $
>
> Reading from it is no problem:
>
> [EMAIL PROTECTED] ~
> $ dd if=/dev/sdb bs=100 count=1 | od -c
> 1+0 records in
> 1+0 records out
> 0000000 353 < 220 M S D O S 5 . 0 \0 002 001 006 \0
> 0000020 002 \0 002 @ \0 370 001 \0 001 \0 001 \0 \0 \0 \0 \0
> 0000040 \0 \0 \0 \0 \0 \0 ) { 6 354 024 N O N A
> 0000060 M E F A T 1 2 3 311
> 0000100 216 321 274 360 { 216 331 270 \0 216 300 374 275 \0 |
> 0000120 8 N $ } $ 213 301 231 350 < 001 r 034 203 353 :
> 0000140 f 241 034 |
> 0000144
>
> [EMAIL PROTECTED] ~
> $
>
> Is this expected behaviour under cygwin? What does "no space left on
> device" even mean for a raw disk volume as opposed to a logical volume /
> partition?
strace or gdb should be helpful in identifying the Windows error code that
is mapped by Cygwin to ENOSPC. From a quick look at the code, this could
be a general write error, but I haven't spent all that much time looking
at it.
Igor
--
http://cs.nyu.edu/~pechtcha/
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