From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Andrey Melnikov <temnota.am@gmail.com>
Cc: Zhong Li <lizhongfs@gmail.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
linux-scsi@vger.kernel.org
Subject: Re: [RFC,v2] scsi: scan: map PQ=1, PDT=other values to SCSI_SCAN_TARGET_PRESENT
Date: Thu, 26 Sep 2019 19:26:18 -0400 [thread overview]
Message-ID: <yq1h84y1vxh.fsf@oracle.com> (raw)
In-Reply-To: <CA+PODjpG7NLTH8wp9qw08ACj4=8sUusmkZv6X7QWHtdbNJ1S0Q@mail.gmail.com> (Andrey Melnikov's message of "Thu, 12 Sep 2019 15:37:20 +0300")
Andrey,
>> > This patch break exposing individual RAID disks from adaptec raid
>> > controller. I need access to this disc's for S.M.A.R.T monitoring.
>
> adaptec report hidden luns with PQ=1, PDT=0 - now it skipped.
>> > Please find other way to workaround bugs in IBM/2145 controller.
Spent some time on this today and I'm in agreement with Zhong's
interpretation of the SCSI spec.
What puzzles me is that aacraid already supports the no_uld_attach
feature so I'm not sure why it also sets PQ=1 for physical devices?
We could either have a SCSI host flag to override the behavior or
consider masking PQ in the driver. Unfortunately, I don't have any
aacraid controllers I can test with in my test setup so I'd have to
synthesize a setup with scsi_debug.
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2019-09-26 23:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-29 15:49 [RFC,v2] scsi: scan: map PQ=1, PDT=other values to SCSI_SCAN_TARGET_PRESENT Andrey Melnikov
2019-09-12 4:56 ` Zhong Li
2019-09-12 12:37 ` Andrey Melnikov
2019-09-22 12:07 ` Li Zhong
2019-09-26 23:26 ` Martin K. Petersen [this message]
2019-09-27 14:16 ` Hannes Reinecke
2019-10-01 1:53 ` Martin K. Petersen
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