Re: [PATCH] Hidden scsi devices

[Brian King <brking@us.ibm.com>]

James Bottomley wrote:
> On Thu, 2004-01-22 at 12:07, Brian King wrote:
> 
>>Because the device is reported to the LLDD by the adapter as a
>>specific device type. The adapter creates a configuration table
>>describing all attached devices that the LLDD must retrieve. In this
>>configuration table there are several types of devices:
> 
> 
> If you can't ever get access to these devices and you only want sg
> access for SCSI command ioctls, you could just alter the device type to
> something like PROCESSOR (or even an unclassified type) which will solve
> the error messages from sd problem.

I agree that this is a solution as well (requires more code), but
then sysfs will show the device as a different device type, which
I would think might be confusing.

> The true solution to this issue looks to be more flexibility in the
> binding process.  We did discuss this previously, certainly in a SAN
> environment there are reasons for only actually binding (and allocating
> resources to) devices you're interested in.

Who generally has this knowledge in your example? The LLDD? Would a
LLDD host template function that gets called for each disk be more
palatable?


-- 
Brian King
eServer Storage I/O
IBM Linux Technology Center