On Wed, 28 May 2003, Mike Simons wrote:
> On Wed, May 28, 2003 at 11:31:56AM -0700, Jeff Newmiller wrote:
> > On Tue, 27 May 2003, Mike Simons wrote:
> > > Last week I was having problems with the ide layer... it retries
> > > way too many times. I was trying to read 512 byte blocks from a dying
> > > /dev/hda (using dd_rescue which calls pread), for each bad sector the
> > > kernel would try 8 times,
[...]
> > > - Any other ideas on how to pull the disk blocks?
> >
> > Not easy ones. (Build your own device driver that doesn't use mmap.)
>
> Michael Wenk suggested using O_DIRECT on the open call, which is
> an excellent idea. This was what the Oracle people at their Clustering
> Filesystem talk. I have one more failing hard drive around which I'm
> going to try that on...
Kudos to Michael. I had no idea such a flag existed (it isn't in my
Debian manpage, nor in "Linux Application Development").
[...]
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