SCSI and SAN

[Wilko Bulte]

Quoting Eric Anderson, who wrote on Fri, Oct 05, 2007 at 08:03:25AM -0500 ..
> Sharad Chandra wrote:
> >On Friday 05 October 2007 5:25 pm, Eric Anderson wrote:
> >>Sharad Chandra wrote:
> >> > On Thursday 04 October 2007 6:51 pm, Eric Anderson wrote:
> >> >> Sharad Chandra wrote:
> >> >>> Hello,
> >> >>>
> >> >>> 	How to distinguish if /dev/da* devices are internal scsi 
> >> drivers
> >>
> >>or LUNs
> >>
> >> >>> of external SAN?
> >> >>
> >> >> camcontrol devlist -v
> >> >>
> >> >> Might help you..
> >> >>
> >> >> Eric
> >>>Yes, right by analyzing camcontrol devlist it can be told, but i guess
> >>>not always.
> >>>
> >>>[root at qa7 ~]# camcontrol devlist
> >>><IFT A16F-G2422 348C>              at scbus0 target 0 lun 0 (da0,pass0)
> >>><IFT A16F-G2422 348C>              at scbus0 target 0 lun 1 (da1,pass1)
> >>><IFT A16F-G2422 348C>              at scbus0 target 0 lun 2 (da2,pass2)
> >>><IFT A16F-G2422 348C>              at scbus0 target 0 lun 3 (da3,pass3)
> >>>
> >>>Here luns are increasing, so it is SAN confirmed by tool. Now my point is
> >>>if i have a SAN of less than 1TB and i make only 1 LUN. what should be
> >>>output? guessing: similar to
> >>><IFT A16F-G2422 348C>              at scbus0 target 0 lun 0 (da0,pass0)
> >>>
> >>>Then it will be difficult to tell, whether it is regular SCSI drives or
> >>>SAN. Then we need a tool that can tell this da0 belongs to SAN/SCSI or
> >>>not
> >>Notice the -v to camcontrol.  It will tell you which controller the
> >>device belongs to, and the controller will help you determine whether it
> >>is connected to a SAN or not.
> >
> >[root at qa7 ~]# camcontrol devlist -v
> >scbus0 on isp0 bus 0:
> ><IFT A16F-G2422 348C>              at scbus0 target 0 lun 0 (da0,pass0)
> ><IFT A16F-G2422 348C>              at scbus0 target 0 lun 1 (da1,pass1)
> ><IFT A16F-G2422 348C>              at scbus0 target 0 lun 2 (da2,pass2)
> ><IFT A16F-G2422 348C>              at scbus0 target 0 lun 3 (da3,pass3)
> ><  >                               at scbus0 target -1 lun -1 ()
> >scbus-1 on xpt0 bus 0:
> ><  >                               at scbus-1 target -1 lun -1 (xpt0)
> >
> >Does it?
> 
> Well, isp0 is a QLogic fiber channel card, so that's as much as you will 

or a parallel SCSI one, that uses same driver.

-- 
Wilko Bulte				wilko at FreeBSD.org