On 5/13/2010 1:42 PM, Eero Volotinen wrote: > 2010/5/13 Les Mikesell<lesmikesell at gmail.com>: >> Has anything changed in updates that would affect md raid1 resync speed? >> I regularly swap a 750G drive and resync to keep an offsite copy and >> haven't paid enough attention to known when things changed but it seems >> to take much longer to sync than it did months ago, even if I unmount >> the partition and stop most other processes that might compete with it. >> > > well, try this: > > http://www.ducea.com/2006/06/25/increase-the-speed-of-linux-software-raid-reconstruction/ OK, I can get a full-size Seagate 750G to resync at about 40M/s which easily completes in a workday. But now what I really want to do is use a laptop size 'WD Scorpio blue' drive which claims to have the same sector count but will only sync at about a tenth of the speed. It does say it uses 'advanced format', which I think means 4k sectors. Should that make a difference? Read speed tests show about the same as the desktop drives but writes are much slower. -- Les Mikesell lesmikesell at gmail.com