From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Bernd Schubert <bernd.schubert@itwm.fraunhofer.de>
Cc: Joe Lawrence <joe.lawrence@stratus.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Dan Williams <dan.j.williams@gmail.com>,
linux-raid <linux-raid@vger.kernel.org>,
linux-scsi <linux-scsi@vger.kernel.org>
Subject: Re: RAID-10 keeps aborting
Date: Wed, 05 Jun 2013 15:11:21 -0400 [thread overview]
Message-ID: <yq1vc5spe3q.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <51AF232C.8060209@itwm.fraunhofer.de> (Bernd Schubert's message of "Wed, 05 Jun 2013 13:38:20 +0200")
>>>>> "Bernd" == Bernd Schubert <bernd.schubert@itwm.fraunhofer.de> writes:
Bernd> And I also don't see any driver setting max_ws_blocks, so
Bernd> everything except of libata gets the default of
Bernd> SD_MAX_WS10_BLOCKS.
Yes. That's intentional. Unless the device provides MAXIMUM WRITE SAME
BLOCKS in the BLOCK LIMITS VPD.
Bernd> As the correct handling in the md layer seems to be difficult,
Bernd> can we send a fake request at device configuration time to figure
Bernd> out if the device really support write-same?
The problem is that WRITE SAME is destructive. And unfortunately a block
count of 0 means "write entire device".
--
Martin K. Petersen Oracle Linux Engineering
prev parent reply other threads:[~2013-06-05 19:11 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <51AC1440.7020505@zytor.com>
[not found] ` <CAA9_cmddLfReYeAhgwh5=j6ELMBNx5Oq7Gg8K+fo0PneaEfrVA@mail.gmail.com>
[not found] ` <51AC3283.4000403@zytor.com>
[not found] ` <CAA9_cme6tYpYnrZDbrDduwPCjVn+PFbx_rZNPFazBEU9EF0upw@mail.gmail.com>
[not found] ` <51ACBAA0.40604@zytor.com>
[not found] ` <CAA9_cmc3Gs91C4aV6okUw-=q+fACm1+dooyafOZi+Lnj+Ne_ig@mail.gmail.com>
[not found] ` <51ACD511.4030604@zytor.com>
[not found] ` <yq1y5art543.fsf@sermon.lab.mkp.net>
[not found] ` <51AD2485.9000601@zytor.com>
[not found] ` <alpine.DEB.2.02.1306041132260.19072@jlaw-desktop.mno.stratus.com>
[not found] ` <51AF0CCF.8000909@itwm.fraunhofer.de>
2013-06-05 11:38 ` RAID-10 keeps aborting Bernd Schubert
2013-06-05 12:53 ` [PATCH] scsi: Check if the device support WRITE_SAME_10 Bernd Schubert
2013-06-05 19:14 ` Martin K. Petersen
2013-06-05 20:09 ` Bernd Schubert
2013-06-07 2:15 ` Martin K. Petersen
2013-06-12 19:34 ` Bernd Schubert
2013-06-05 19:11 ` Martin K. Petersen [this message]
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