Subject: Re: aix7xxx problems with negotiating "Ultra" speeds....
To: None <>
From: Noriyuki Soda <>
List: current-users
Date: 12/10/1998 12:58:40
Matthew Jacob wrote:
> > But, otherwise (e.g. the drivers which handle different HBA), both julian
> > and CAM scsi middle layer can run at the same time.
> > Am I misunderstanding something ?
> The CAM code also includes target drivers. The paradigms are
> somewhat different.
> It's possible to have config options that compile different classes of
> files based upon CAM or not-CAM, but doubtful to support them both in the
> same kernel at the same time.

Theoretically both "sd" of julian and "da" of CAM can co-exist at the
same time in the same kernel.

Justin T. Gibbs wrote:
> You can achieve this only if you give unique names to the peripheral
> (disk, tape, cdrom, etc.) drivers of both layers.  Either that, or
> you write a JE->CAM HBA shim and run the old drivers through this
> emulator.

In other words, there are two ways coexistence.