From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Paul Menzel <pmenzel@molgen.mpg.de>
Cc: linux-scsi@vger.kernel.org, Adam Radford <linuxraid@lsi.com>
Subject: Re: Ordering problems with 3ware controller
Date: Tue, 08 Nov 2016 18:45:48 -0500 [thread overview]
Message-ID: <yq1bmxpr0wj.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <a41b4bab-edb7-34ab-eb76-7ff4d6e3f677@molgen.mpg.de> (Paul Menzel's message of "Tue, 8 Nov 2016 11:07:37 +0100")
>>>>> "Paul" == Paul Menzel <pmenzel@molgen.mpg.de> writes:
Paul,
Paul> Updating from Linux 4.4.X to Linux 4.8.4, we noticed that the
Paul> 3ware devices under `/dev` – `/dev/twa0`, `/dev/twa1`, … – map to
Paul> the controllers differently.
Paul> This unfortunately breaks quite a lot of our scripts, as we depend
Paul> on the fact that the first controller is also in the front.
It's not the 3ware drivers since they have not been updated in a long
time (since way before 4.4).
Linux does not provide device discovery ordering guarantees. You need to
fix your scripts to use UUIDs, filesystem labels, or DM devices to get
stable naming.
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2016-11-08 23:46 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-08 10:07 Ordering problems with 3ware controller Paul Menzel
2016-11-08 11:09 ` Paul Menzel
2016-11-08 23:45 ` Martin K. Petersen [this message]
2016-11-09 9:08 ` Paul Menzel
2016-11-10 13:59 ` Martin K. Petersen
2016-11-16 21:24 ` Donald Buczek
2016-11-17 14:55 ` Paul Menzel
2016-11-17 19:55 ` Donald Buczek
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