-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Friday, 2013-03-29 at 22:41 -0700, Linda Walsh wrote:
Try measuring the "raw" disk READ times...(without any file system)... that should tell you how fast the disks can go w/o FS overhead.
time dd if=/dev/sda of=/dev/null bs=16M count=256 --- that will do a raw read...
I think you can do better with "hdparm -tT /dev/sda" :-)
Note if you read from a partition /dev/sda1, /dev/sda2... The higher numbered partitions will likely be slower (assuming (spinning hard disks) and not SolidStateDrives/SSD).
Not always true. Once I partitioned a disk in 20 or 30 partitions, and tested speed on all of them. The faster region was about 1/3 of the disk. It was slower at the end of the disk than at the start; that I expected, but not that it would be faster at 1/3. I think I would have to rerun the test on other disks, to see if it repeats the same pattern. It will depend on how the tracks are actually translated. But it is a tedious test to run, unless you script it... - -- Cheers, Carlos E. R. (from 12.1 x86_64 "Asparagus" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (GNU/Linux) iEYEARECAAYFAlFXaV0ACgkQtTMYHG2NR9XzeACeLwBNy5sKQYFGU/i2CMBxqxE4 TAkAn0gc8sv9nTsHRr5OZhiZYHACKqT9 =jOTY -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org