On Sun, 15 Nov 2015 03:01:57 PM Duncan wrote: > That looks to me like native drive limitations. > > Due to the fact that a modern hard drive spins at the same speed no > matter where the read/write head is located, when it's reading/writing to > the first part of the drive -- the outside -- much more linear drive > distance will pass under the read/write heads in say a tenth of a second > than will be the case as the last part of the drive is filled -- the > inside -- and throughput will be much higher at the first of the drive.
http://www.coker.com.au/bonnie++/zcav/results.html The above page has the results of my ZCAV benchmark (part of the Bonnie++ suite) which shows this. You can safely tun ZCAV in read mode on a device that's got a filesystem on it so it's not too late to test these things. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/ -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
