29 Nov
2015
29 Nov
'15
1:03 p.m.
On Nov 29, 2015, at 12:13 PM, Warner Losh <imp at bsdimp.com> wrote:
A similar thing was implemented on the old DEC Rainbow
100 (though
I'm sure others). To give the software a chance to do some minor things
while processing, it physically laid out the 10 sectors as 0 2 3 4 6 8 1 3 5 7 9
so that when reading sequentially, you had half a disk rotation to get your act
together to read the next sector. This turned out to be only a small
performance win, and was a pita for interoperability,
?.but, at least you had a functionally redundant sector 3!
:-)