Re: Speed variation depending on disk position (was: Linux SW RAID: HW Raid Controller/JBOD vs. Multiple PCI-e Cards?)

2007-05-06 Thread Mark Hahn
very same question. Is the behavior you are describing above manufacturer dependent or it is pretty much dictated by the general design of modern drives? the latter. the industry keyword is Zone Bit Recording, which simply tries to record data as densely as possible - determined by linear

Speed variation depending on disk position (was: Linux SW RAID: HW Raid Controller/JBOD vs. Multiple PCI-e Cards?)

2007-05-05 Thread Peter Rabbitson
Chris Wedgwood wrote: snip Also, 'dd performance' varies between the start of a disk and the end. Typically you get better performance at the start of the disk so dd might not be a very good benchmark here. Hi, Sorry for hijacking this thread, but I was actually planning to ask this very