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Paul Hirst wrote: > On Sat, 2010-07-10 at 21:01 +0100, Simon Waters wrote: >> Curiosity driven question. >> >> If I write data to my external hard disk, how can I ensure that a read >> to verify that data isn't using a cache? > > You should be able to: > sync > echo 3 > /proc/sys/vm/drop_caches > > and then try to read the data back. Does drop_caches touch the disks own cache. I thought it guaranteed only to flush the OS caches. -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq