Corinna Vinschen via Cygwin wrote:
On Feb 12 17:32, Cedric Blancher via Cygwin wrote:
Good afternoon!
Is copying sparse files broken in 3.6.0-0.362.g68c13dc92f65.x86_64?
cp --version
cp (GNU coreutils) 9.5
Packaged by Cygwin (9.5-1
Checklist:
- Volume has FILE_SUPPORTS_SPARSE_FILES
- Cygwin mount has "sparse" option (mount Y: -o sparse,exec /cygdrive/y)
Do all mount points below /cygdrive have 'sparse,exec' set?
If not, this may not work because different mount options for individual
/cygdrive/s are not supported (AFIAK).
- source file has FILE_ATTRIBUTE_SPARSE_FILE set
But cp --sparse=auto ... or any other combination of --sparse does
copy holes, i.e. turns 500GB of hole into 500GB of data (zero bytes).
echo "hello sparse file\n" >testcase17_sparse_begins_with_data && dd
if=/dev/null of=testcase17_sparse_begins_with_data oflag=append bs=1
count=1 seek=$((65536*512)) && echo "endoffile"
testcase17_sparse_begins_with_data
Works for me:
$ uname -r
3.6.0-0.362.g68c13dc92f65.x86_64
$ pwd
/home/corinna/tmp
$ mount | grep tmp
C:/cygwin64/home/corinna/tmp on /home/corinna/tmp type ntfs
(binary,sparse,user,bind)
This mount is independent from /cygdrive. That may make the difference.
--
Regards,
Christian
--
Problem reports: https://cygwin.com/problems.html
FAQ: https://cygwin.com/faq/
Documentation: https://cygwin.com/docs.html
Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
