On 21 May 2012, at 12:22pm, "Black, Michael (IS)" <michael.bla...@ngc.com> wrote:
> I'll have to check the BIOS settings on my box and see if turning off write > caching makes more sense on that particular test. That won't do any harm, but you should be aware that your hardware lies. Some current hard disk drives don't even have jumper settings for 'write before acknowledge'. They just acknowledge the write command as soon as it's interpreted and do the physical write-to-surface when convenient, sometimes writing out-of-order because they save up writes and do them as the appropriate sector is rotated to the read/write head. In other words your hard disk drive lies to your computer, and there's nothing you can do about it. More expensive drives have jumper settings to put them in 'write before acknowledge' mode. And most of those actually implement it correctly. But you're very unlikely to find an internal boot disk in a computer set up like that because it slows the computer down a lot. Using something like Word, for instance, is annoyingly slow. You are more likely to see those jumper settings for a disk in a RAID frame, or an external hard disk drive used for archiving. Simon. _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
