Re: RAW and soft RAID interaction

Stephen C. Tweedie (sct@redhat.com)
Mon, 18 Oct 1999 18:26:20 +0100 (BST)


Hi,

On Sat, 16 Oct 1999 13:55:50 +0200, Davide Rossetti
<davide.rossetti@roma1.infn.it> said:

> By chance we found a (bad?) interaction between the raw device when
> attached to md RAID0 devices. I easily tracked it down to
> raw.c:raw_open() setting blocksize to 512.

Ouch. Ingo, what's the best way to deal with this? We really ought
to be able to set any blocksize on any device without that sort of
performance penalty, but it looks as if the raid0 device just isn't up
to handling that.

There are applications which attempt to write in 512-byte units to a
raw device. Setting the default blocksize to anything larger isn't
really an option.

--Stephen

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/