[ale] USB->IDE problems
Chris Fowler
cfowler at outpostsentinel.com
Wed Jan 21 17:57:51 EST 2004
vfat?
I do not really care about the data written to flash. I just do not
want to have to clean the darn thing each time. Its mostly for log
files.
On Wed, 2004-01-21 at 14:16, Stephan Uphoff wrote:
> You might also want to disable write caching on the ide drive.
> This will probably kill your write speed and is rumored to shorten the
> lifespan of the drive.
> However all filesystems (journaled or not) depend on ordered writes
> for file system integrity.
> Write buffering reorders writes and can on power failure (unplug)
> leave the filesystem in a state not expected by the recovery tools. (fsck)
>
> You might also get an unreadable sector if you unplug the drive while it is
> writing
> ... but there is nothing you can do about it.
>
> Stephan
>
> > I thought there was away you could tell the kernel to send stuff
> > directly to disk and not buffer it.
> >
> > On Wed, 2004-01-21 at 11:48, James P. Kinney III wrote:
> > > Ext3 would be a better bet than ext2. The important thing would be a
> > > tweak to somehow force frequent sync to avoid file corruption. I don't
> > > think that is an hdparm setting. Maybe it could be a cron job
> > >
> > > if { `grep -c "/dev/sda" /etc/mtab` != 0 }; then
> > > sync
> > > fi
> > >
> > > (I wouldn't trust that script with anything as I am sure the syntax is
> > > wrong)
> > >
> > > On Wed, 2004-01-21 at 10:54, Christopher Fowler wrote:
> > > > The next question would be how to best deal with file systems of this
> > > > nature. Since anyone could unplug the drive ext2 would not be a good
> > > > choice. Would ext3 be a good choice? I want to be able to unplug and
> > > > plug the device back in without fs corruption.
> > > >
> > > > On Wed, 2004-01-21 at 10:43, James P. Kinney III wrote:
> > > > > _______________________________________________
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