-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 2016-12-09 21:13, Martin Wilck wrote:
On Fri, 2016-12-09 at 02:37 +0100, Carlos E. R. wrote:
An interesting exercise is to partition an empty disk in, say, 20 equally sized partitions, and measure the speed on each one. And do it for different filesystems, too.
You probably will find out that the disk is faster about 1/3 of the way.
True for sequential IO, for obvious reasons (more data on a single track in the outer part of the disk). For random IO, you'll have an average wait time of a half rotation, plus head movement, and both is independent on the length of the track.
The curious thing is that outer part of the disk is often slower than some way into the disk. - -- Cheers / Saludos, Carlos E. R. (from 13.1 x86_64 "Bottle" (Minas Tirith)) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iF4EAREIAAYFAlhLH/IACgkQja8UbcUWM1zlTgD7BSKnLHs3gk0Ucg6MNXYsuqb2 F/iGgrnyDFEF2ijcwIsA/2o5epJ1xP+n9tIMVRVLXBny32VXoEXr1C8dTD4EKHMV =HFtn -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse-factory+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-factory+owner@opensuse.org