In message <[EMAIL PROTECTED]>, Rasmus Skaarup writes:
>On Tue, 12 Mar 2002, Poul-Henning Kamp wrote:
>> In message <[EMAIL PROTECTED]>, Carl Makin writes:
>> >On Mon, 2002-03-11 at 06:34, Poul-Henning Kamp wrote:
>> >
>> >> The GEOM code is now ready for early testing:
>> >
>> >Would GEOM support accessing a device via multiple paths? (ie could we
>> >write a method that would do that?)
>> Yes, that would be possible.
>Have you given any thought to how that might be implemented? If somekind
>of ID is required to identify the same disk via multiple paths, in which
>part of GEOM will this be implemented?
>I can't figure out from your documentation whether you have somekind of
>"Master GEOM" instance that initiates the device recognition, or otherwise
>how is this initiated?

Basically when a new "g_provider" is created it is offered to each method
in turn and if that method likes it, it can stick g_geom on top of it.

How you would recognize the same disk on thre different paths is a good
question.  We could implement (if we don't already have it) an 
ioctl/BIO_GETATTR which returns the serial number(s) of the diskdevice
and you could query that.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
[EMAIL PROTECTED]         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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