From: Stefan Richter <stefanr@s5r6.in-berlin.de>
To: Grant Grundler <grundler@google.com>
Cc: Jeff Garzik <jeff@garzik.org>,
linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] libata: rewrite SCSI host scheme to be one per ATA host
Date: Fri, 24 Apr 2009 13:00:49 +0200 [thread overview]
Message-ID: <49F19BE1.6030104@s5r6.in-berlin.de> (raw)
In-Reply-To: <da824cf30904221208l42e41d38g5af52b1b3b5ea9a1@mail.gmail.com>
Grant Grundler wrote:
> Data Center
> environments (not just Google's) like to track disks in many different
> ways, including the SCSI identifiers since this one "key" for physical
> location. Breaking the current mappings is going to cause some people
> a world of pain
If by SCSI identifiers you mean the Linux SCSI core's h:c:i:l, then
remember that these are scsi-core internal artifacts without any meaning
to lower and upper layers whatsoever, including userspace. (Exception:
The c:i:l part has some significance with SCSI Parallel Interface
attached hardware.)
> since they will need to manually build (and integrate)
> old->new maps of the SCSI identifiers.
Stock udev already provides mapping according to actually useful
identifiers (if the respective transport provides them: persistent and
unique identifiers of targets and logical units).
--
Stefan Richter
-=====-==--= -=-- ==---
http://arcgraph.de/sr/
prev parent reply other threads:[~2009-04-24 11:00 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-22 9:09 [PATCH] libata: rewrite SCSI host scheme to be one per ATA host Jeff Garzik
2009-04-22 9:23 ` Jeff Garzik
2009-04-22 12:16 ` Boaz Harrosh
2009-04-22 15:10 ` Daniela Engert
2009-04-22 15:18 ` Alan Cox
2009-04-22 15:37 ` James Bottomley
2009-04-22 16:27 ` Alan Cox
2009-04-22 18:36 ` Jeff Garzik
2009-04-22 19:27 ` James Bottomley
2009-04-22 16:48 ` Jeff Garzik
2009-04-23 6:35 ` Jens Axboe
2009-04-23 10:39 ` Jeff Garzik
2009-04-23 10:43 ` Jens Axboe
2009-04-22 13:09 ` Mark Lord
2009-04-22 16:52 ` Jeff Garzik
2009-04-22 19:08 ` Grant Grundler
2009-04-23 11:00 ` Jeff Garzik
2009-04-23 17:59 ` Grant Grundler
2009-04-23 18:09 ` James Bottomley
2009-04-24 11:00 ` Stefan Richter [this message]
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