Re: 1394 and Dual Channel IDE Bridge Boards

Alan Williams wrote:
> I'm running Redhat AS 3.0 and have ieee1394 working to an IDE Array using a
> Dual Channel IDE Bridge Board.

(RHEL v3 is based on Linux 2.4.21.)

> I have seen some comments that you can/should only use one drive per
> channel. Is this correct?

Due to incomplete implementation, older 2.4 kernels and some 2.6 kernels
 --- everything between 2.6.3 (exclusive?) and 2.6.10 inclusive --- do
not support some of the multi-unit bridges. They recognize only one of
the subunits (in terms of IEEE 1212).

> In writing to one channel I notice that the HD led for both disks on that
> channel are coming on. Is it trying to write to both Disks?

Can't comment on this one.

> What is needed to get 2 devices per channel working?

Dan Dennedy mentioned that at least kernel 2.4.22 is required for the
Powerfile C200 jukebox, which is also a multi-unit device. It may also
be possible to insert the driver sources from linux1394.org's linux-2.4
branch into Red Hat's kernel.

In case of kernel 2.6, either an old & buggy kernel or the current
drivers from linux1394.org are required. The latter compile only in
2.6.11-rc#.

-- 
Stefan Richter
-=====-=-=-= --=- ==--=
http://arcgraph.de/sr/
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