RE: /proc/scsi/map

[Heinz, Michael]

--
Michael Heinz
Infinicon Systems, Inc.
http://www.infiniconsys.com 

> -----Original Message-----
> From: Sancho Dauskardt [mailto:[e-mail]]
> Sent: Saturday, June 15, 2002 3:50 PM
> To: Kurt Garloff; Linux kernel list; Linux SCSI list
> Cc: [e-mail];
> [e-mail]
> Subject: Re: /proc/scsi/map
> 
> 
> 
> >Life would be easier if the scsi subsystem would just report 
> which SCSI
> >device (uniquely identified by the 
> controller,bus,target,unit tuple) belongs
> >to which high-level device. The information is available in 
> the kernel.
> >
> >Attached patch does this:
> >garloff@pckurt:/raid5/Kernel/src $ cat /proc/scsi/map
> ># C,B,T,U       Type    onl     sg_nm   sg_dev  nm      dev(hex)
> >0,0,00,00       0x05    1       sg0     c:15:00 sr0     b:0b:00
> [...]
> 
> Great, this was really missing badly.
> 
> But how about adding another column: GUID.
> Most usb-storage and (all?) FireWire devices have such a 
> unique identitiy.
> In contrast to native SCSI devices, these emulated SCSI devices on 
> hot-plugging busses will change their LUNs/IDs. Therefor the 
> GUID is really 
> a must to be able to create stable names (laptop suspend, etc.).
> 
> Both usb-storage and iee1394-sbp2 know the GUID. It only needs to be 
> communicated..
> 
> I'd guess that FibreChannel has similar problems ?
> 
> - sda
> 
> -
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