On Monday 20 August 2007, Philip Webb wrote: > 070820 Mick wrote: > > On Sunday 19 August 2007, Philip Webb wrote: > >> I copied a series of dirs to my USB stick > >> & as each one was done, they took successively longer to finish, > >> tho' they were all roughly the same size. It must be something > >> to do with the way the data is laid out on the stick. > > > > Is this the case when you sync after copying each dir to the stick? > > I haven't tried doing that (it wb a bit of a pain in ordinary usage): > what difference might it make ?
I've noticed on some CF devices IO buffering caused increasingly longer copying times. This was over an older 1.1 interface, not the faster USB2.0. I never bottomed out if this has something to do with the CF onboard controller or the PC USB controller. Small files went across fine, it was the larger 700MB+ that started splattering. Ultimately, the copying would complete, but take increasingly longer to get there. Running sync will write all cached data into the card. Anyway, just a thought to see if loading the cache with successive files causes it. -- Regards, Mick
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