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From: Luben Tuikov <luben_tuikov@adaptec.com>
To: dougg@torque.net
Cc: Patrick Mansfield <patmans@us.ibm.com>, linux-scsi@vger.kernel.org
Subject: Re: Report luns
Date: Wed, 10 Nov 2004 09:13:34 -0500	[thread overview]
Message-ID: <4192220E.80805@adaptec.com> (raw)
In-Reply-To: <41919D7B.5040703@torque.net>

Douglas Gilbert wrote:
> 
> So now if one sends a REPORT LUNS to lun 0 that U320 disk is
> expected to know about its sibling disks!? That is why I used
> the term "hack" with respect to lun 0. What really happens
> is the device server in the bridge intercepts the REPORT LUNS
> command and produces a response reflecting its knowledge of
> those 5 U320 disks present. Why play this game? Why not talk
> directly to the device server (addressed via a well known lu).
> This way an INQUIRY to a W-LUN yields information about
> the bridge, while an INQUIRY to lun 0 yields information about
> that disk.

Very good point!

So we can reverse the logic into sending REPORT LUNS to
the REPORT LUNS W-LUN *first* and if this fails (most probably
in early years), then issue REPORT LUNS to LUN 0.

	Luben


  reply	other threads:[~2004-11-10 14:13 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-10-27 23:33 Apple Xserve RAID and qlogic ISP2312 (qla2300) Catalin Muresan
2004-10-28 14:37 ` Patrick Mansfield
2004-10-28 15:35   ` Catalin Muresan
2004-10-28 16:42     ` Patrick Mansfield
2004-10-28 16:51       ` Patrick Mansfield
2004-10-28 17:21       ` Andrew Vasquez
2004-10-29  8:58         ` Catalin Muresan
2004-10-29 18:06           ` Patrick Mansfield
2004-10-30 15:44             ` Catalin Muresan
2004-11-01 10:56             ` Catalin Muresan
2004-11-01 19:48               ` Patrick Mansfield
2004-11-09  2:49                 ` Report luns [was: Apple Xserve RAID and qlogic ISP2312 (qla2300)] Douglas Gilbert
2004-11-09 15:06                   ` Luben Tuikov
2004-11-09 21:10                     ` Patrick Mansfield
2004-11-09 22:07                       ` Luben Tuikov
2004-11-10  4:47                       ` Report luns Douglas Gilbert
2004-11-10 14:13                         ` Luben Tuikov [this message]
2004-11-10  5:19                     ` Report luns [was: Apple Xserve RAID and qlogic ISP2312 (qla2300)] Douglas Gilbert
2004-11-10 14:47                       ` Luben Tuikov
2004-10-29  9:01       ` Apple Xserve RAID and qlogic ISP2312 (qla2300) Catalin Muresan
  -- strict thread matches above, loose matches on Subject: below --
2003-06-13 14:04 REPORT LUNS Josef Möllers
2003-06-13 18:22 ` Patrick Mansfield
2003-06-16  6:55   ` Josef Möllers
2003-06-23 16:49     ` Patrick Mansfield
2003-06-24  6:51       ` Josef Möllers

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