On Tuesday 13 October 2009, Huihong Luo wrote: > This seems to be always the case, writing a large amount of data to vdi/vhd > is much much slower than writing to a vmdk disk. > I am using the the vboxddu.dll code, and clone physical disk to virtual > disk. > for example, clone 250G takes about 2.50 hrs to a vmdk file, whereas it > takes 4 hrs to a vdi file, under exact conditions, quite reproducible. > There is only writes to disks, no reads.
So this is a Windows host, correct? I can't imagine the reason for such a slowdown as there are not many differences between the backends. One differnece between .vmdk and .vdi is the block size. This needs further investigation. Kind regards, Frank -- Dr.-Ing. Frank Mehnert Sun Microsystems, Inc. www.sun.com
signature.asc
Description: This is a digitally signed message part.
_______________________________________________ vbox-dev mailing list [email protected] http://vbox.innotek.de/mailman/listinfo/vbox-dev
