On Tue, 04 Oct 2011 12:45:58 EDT erik quanstrom <quans...@quanstro.net> wrote: > > Writing 25000 4k records stepping by 8k takes > > sector offset 1-7 mod 8: 27-30 sec > > sector offset 0 mod 8: 14-17 sec > > > > Conclusion: WD10EARS has 4k byte physical sectors but is pretty > > good at concealing it.
Weren't there 4k sector disks that mapped the 1st 4k sector to just the mbr? So the next four 512B sectors got mapped to the next 4k sector and so on. As a result your nicely "aligned" on 4k boundaries IO wouldn't be aligned at all. Are there still such disks one should avoid? > it's amazing how fast you can be if you don't care about losing data > on power loss. :-) it's amazing how simple you life can be if you don't care about losing data :-) I call it garbage collection! Because if you really cared you'd have already saved your stuff! [Cue George Carlin on "stuff"]
