Re: Maximum transaction rate

On Mon, Mar 16, 2009 at 2:03 PM, Stefan Kaltenbrunner
<stefan@kaltenbrunner.cc> wrote:
> So in my understanding LVM is safe on disks that have write cache disabled
> or "behave" as one (like a controller with a battery backed cache).
> For storage with write caches it seems to be unsafe, even if the filesystem
> supports barriers and it has them enabled (which I don't think all have)
> which is basically what all of linux was not too long ago.

I definitely didn't have this problem with SCSI drives directly
attached to a machine under pgsql on ext2 back in the day (way back,
like 5 to 10 years ago).  IDE / PATA drives, on the other hand,
definitely suffered with having write caches enabled.