From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: "Pasi Kärkkäinen" <pasik@iki.fi>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
Ankit Jain <jankit@suse.com>,
linux-scsi@vger.kernel.org,
James.Bottomley@hansenpartnership.com, Eric.Moore@lsi.com
Subject: Re: [SCSI] mpt2sas T10 DIF fixes
Date: Sun, 19 Aug 2012 12:38:43 -0400 [thread overview]
Message-ID: <yq1628eet0s.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <20120819153004.GU19851@reaktio.net> ("Pasi Kärkkäinen"'s message of "Sun, 19 Aug 2012 18:30:04 +0300")
>>>>> "Pasi" == Pasi Kärkkäinen <pasik@iki.fi> writes:
Pasi> So physically the disk is using 520 bytes/sector (and needs to
Pasi> support that), but logically the HBA presents 512 bytes/sector +
Pasi> PI.. is that correct?
Yep. The beauty of PI is that we can store the extra stuff without
having to deal with weird block sizes.
Pasi> I guess what I'm asking is: Can I use sg_format to enable
Pasi> checksums/protection on any disk that physically supports 520
Pasi> bytes/sector, or does the disk need to have special T10 data
Pasi> protection support aswell?
The disk needs to support T10 PI (PROTECT=1 in the Standard Inquiry VPD
page). We don't support driving the HBA in PI mode with a non-PI target.
--
Martin K. Petersen Oracle Linux Engineering
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next prev parent reply other threads:[~2012-08-19 16:40 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-21 1:36 [SCSI] mpt2sas T10 DIF fixes Martin K. Petersen
2012-02-21 1:36 ` [PATCH 1/3] mpt2sas: Return the correct sense key for DIF errors Martin K. Petersen
2012-02-21 1:36 ` [PATCH 2/3] mpt2sas: Add a module parameter that permits overriding protection capabilities Martin K. Petersen
2012-02-21 1:36 ` [PATCH 3/3] mpt2sas: Do not check DIF for unwritten blocks Martin K. Petersen
2012-08-09 8:14 ` [SCSI] mpt2sas T10 DIF fixes Ankit Jain
2012-08-17 16:00 ` Martin K. Petersen
2012-08-19 14:49 ` Pasi Kärkkäinen
2012-08-19 15:18 ` Martin K. Petersen
2012-08-19 15:30 ` Pasi Kärkkäinen
2012-08-19 16:38 ` Martin K. Petersen [this message]
2012-08-19 20:19 ` Pasi Kärkkäinen
2012-08-20 10:48 ` Pasi Kärkkäinen
2012-08-20 11:06 ` Pasi Kärkkäinen
2012-08-21 0:43 ` Martin K. Petersen
2012-08-21 6:13 ` Pasi Kärkkäinen
2012-08-21 0:40 ` Martin K. Petersen
2012-08-21 6:12 ` Pasi Kärkkäinen
2012-08-21 15:50 ` Jiang, Dave
2012-08-22 18:36 ` Martin K. Petersen
2012-10-01 9:17 ` Pasi Kärkkäinen
2012-10-02 22:24 ` Martin K. Petersen
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