On Fri, Dec 11, 2009 at 9:52 AM, Jussi Hirvi <listmember at greenspot.fi> wrote: > Centos 5.x, ext3, md raid1 > > As I do not have UPS for all machines, and I most often use md raid > (level 1), I would like to turn the write cache off for all of my server > discs. But how? > > Below is what I have already found out: > > On the page > > http://lwn.net/Articles/350072/ > > I read that I could do this by running > hdparm -W0 /dev/sdX > , but when I say > hdparm -h, > it says that the -W option is “dangerous”. Don't worry it is safe to use that option. > And when I get this done, then how can I make the setting last over the > next bootup? rc.local it. > P.S. Do you really have to quote the whole thread when you respond? No just the relevant parts. -Ross