From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Chris Friesen <chris.friesen@windriver.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
Jens Axboe <axboe@kernel.dk>, lkml <linux-kernel@vger.kernel.org>,
linux-scsi@vger.kernel.org, Mike Snitzer <snitzer@redhat.com>
Subject: Re: absurdly high "optimal_io_size" on Seagate SAS disk
Date: Fri, 07 Nov 2014 14:17:37 -0500 [thread overview]
Message-ID: <yq1389u95wu.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <545D13FF.6090306@windriver.com> (Chris Friesen's message of "Fri, 7 Nov 2014 12:48:31 -0600")
>>>>> "Chris" == Chris Friesen <chris.friesen@windriver.com> writes:
Chris> Apparently the "hdparm -I" command is giving bogus data as well.
Chris> I've seen that happen if the drive is on a RAID controller--I
Chris> assume that could cause problems with firmware updates too?
I'd suggest trying /dev/sgN instead.
But yes, some RAID controllers require you to use their tooling and
won't allow direct passthrough.
--
Martin K. Petersen Oracle Linux Engineering
WARNING: multiple messages have this Message-ID (diff)
From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Chris Friesen <chris.friesen@windriver.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
Jens Axboe <axboe@kernel.dk>, lkml <linux-kernel@vger.kernel.org>,
<linux-scsi@vger.kernel.org>, Mike Snitzer <snitzer@redhat.com>
Subject: Re: absurdly high "optimal_io_size" on Seagate SAS disk
Date: Fri, 07 Nov 2014 14:17:37 -0500 [thread overview]
Message-ID: <yq1389u95wu.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <545D13FF.6090306@windriver.com> (Chris Friesen's message of "Fri, 7 Nov 2014 12:48:31 -0600")
>>>>> "Chris" == Chris Friesen <chris.friesen@windriver.com> writes:
Chris> Apparently the "hdparm -I" command is giving bogus data as well.
Chris> I've seen that happen if the drive is on a RAID controller--I
Chris> assume that could cause problems with firmware updates too?
I'd suggest trying /dev/sgN instead.
But yes, some RAID controllers require you to use their tooling and
won't allow direct passthrough.
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2014-11-07 19:17 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-06 16:47 absurdly high "optimal_io_size" on Seagate SAS disk Chris Friesen
2014-11-06 17:16 ` Chris Friesen
2014-11-06 17:16 ` Chris Friesen
2014-11-06 17:34 ` Martin K. Petersen
2014-11-06 17:34 ` Martin K. Petersen
2014-11-06 17:45 ` Chris Friesen
2014-11-06 17:45 ` Chris Friesen
2014-11-06 18:12 ` Martin K. Petersen
2014-11-06 18:12 ` Martin K. Petersen
2014-11-06 18:15 ` Jens Axboe
2014-11-06 19:14 ` Chris Friesen
2014-11-06 19:14 ` Chris Friesen
2014-11-07 1:56 ` Martin K. Petersen
2014-11-07 1:56 ` Martin K. Petersen
2014-11-07 5:35 ` Chris Friesen
2014-11-07 5:35 ` Chris Friesen
2014-11-07 15:18 ` Dale R. Worley
2014-11-07 16:25 ` Martin K. Petersen
2014-11-07 16:25 ` Martin K. Petersen
2014-11-07 17:42 ` Martin K. Petersen
2014-11-07 17:42 ` Martin K. Petersen
2014-11-07 17:51 ` Chris Friesen
2014-11-07 17:51 ` Chris Friesen
2014-11-07 18:03 ` Martin K. Petersen
2014-11-07 18:03 ` Martin K. Petersen
2014-11-07 18:48 ` Chris Friesen
2014-11-07 18:48 ` Chris Friesen
2014-11-07 19:17 ` Martin K. Petersen [this message]
2014-11-07 19:17 ` Martin K. Petersen
2014-11-07 21:04 ` Chris Friesen
2014-11-07 21:04 ` Chris Friesen
2014-11-07 17:10 ` Elliott, Robert (Server Storage)
2014-11-07 17:40 ` Martin K. Petersen
2014-11-07 17:40 ` Martin K. Petersen
2014-11-07 20:15 ` Douglas Gilbert
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