From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
"Nicholas A. Bellinger" <nab@linux-iscsi.org>,
"Nicholas A. Bellinger" <nab@daterainc.com>,
target-devel <target-devel@vger.kernel.org>,
linux-scsi <linux-scsi@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Christoph Hellwig <hch@lst.de>, Hannes Reinecke <hare@suse.de>,
Sagi Grimberg <sagig@mellanox.com>,
Or Gerlitz <ogerlitz@mellanox.com>
Subject: Re: [PATCH 09/14] target/configfs: Expose protection device attributes
Date: Mon, 13 Jan 2014 15:30:12 -0500 [thread overview]
Message-ID: <yq138kroca3.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <1389644643.12062.42.camel@dabdike.int.hansenpartnership.com> (James Bottomley's message of "Mon, 13 Jan 2014 12:24:03 -0800")
>>>>> "James" == James Bottomley <James.Bottomley@HansenPartnership.com> writes:
James> I'm intrigued by this: how do you get the extra space, since I
James> heard all the drive vendors were adamant that 520 was it for the
James> current manufacturing processes.
Well, you've been able to get 528-byte sector drives for a long
time. They are used inside arrays that use both PI and internal
metadata.
In any case Type 4 was never intended for 512-byte sectors. The existing
16-bit T10 CRC is pretty useless for 4096-byte blocks so the proposal
was aimed at 4096+16 (but obviously that tidbit is outside of the T10
spec that doesn't mandate block sizes or accompanying PI types).
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2014-01-13 20:30 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-08 20:15 [PATCH 00/14] target: Initial support for DIF Type1+Type3 emulation Nicholas A. Bellinger
2014-01-08 20:15 ` [PATCH 01/14] target: Add DIF related base definitions Nicholas A. Bellinger
2014-01-09 10:58 ` Sagi Grimberg
2014-01-08 20:15 ` [PATCH 02/14] target: Add DIF CHECK_CONDITION ASC/ASCQ exception cases Nicholas A. Bellinger
2014-01-09 10:43 ` Sagi Grimberg
2014-01-10 6:53 ` Nicholas A. Bellinger
2014-01-14 7:44 ` Sagi Grimberg
2014-01-14 8:53 ` Nicholas A. Bellinger
2014-01-14 10:56 ` Sagi Grimberg
2014-01-08 20:15 ` [PATCH 03/14] target/sbc: Add sbc_check_prot + update sbc_parse_cdb for DIF Nicholas A. Bellinger
2014-01-09 14:58 ` Sagi Grimberg
2014-01-10 7:04 ` Nicholas A. Bellinger
2014-01-12 11:59 ` Sagi Grimberg
2014-01-13 19:23 ` Nicholas A. Bellinger
2014-01-10 20:30 ` Martin K. Petersen
2014-01-08 20:15 ` [PATCH 04/14] target/sbc: Add DIF TYPE1+TYPE3 read/write verify emulation Nicholas A. Bellinger
2014-01-08 20:15 ` [PATCH 05/14] target/spc: Add protection bit to standard INQUIRY output Nicholas A. Bellinger
2014-01-10 20:34 ` Martin K. Petersen
2014-01-08 20:15 ` [PATCH 06/14] target/spc: Add protection related bits to INQUIRY EVPD=0x86 Nicholas A. Bellinger
2014-01-10 20:35 ` Martin K. Petersen
2014-01-08 20:15 ` [PATCH 07/14] target/sbc: Add P_TYPE + PROT_EN bits to READ_CAPACITY_16 Nicholas A. Bellinger
2014-01-09 10:24 ` Sagi Grimberg
2014-01-10 6:21 ` Nicholas A. Bellinger
2014-01-10 19:50 ` Andy Grover
2014-01-10 20:15 ` Nicholas A. Bellinger
2014-01-10 20:46 ` Martin K. Petersen
2014-01-12 11:49 ` Sagi Grimberg
2014-01-10 20:40 ` Martin K. Petersen
2014-01-10 20:39 ` Martin K. Petersen
2014-01-12 12:13 ` Sagi Grimberg
2014-01-12 12:33 ` Martin K. Petersen
2014-01-12 12:47 ` Sagi Grimberg
2014-01-12 12:53 ` Martin K. Petersen
2014-01-12 16:37 ` Douglas Gilbert
2014-01-12 17:21 ` Martin K. Petersen
2014-01-12 18:53 ` Douglas Gilbert
2014-01-13 16:33 ` Sagi Grimberg
2014-01-12 12:13 ` Sagi Grimberg
2014-01-10 20:37 ` Martin K. Petersen
2014-01-08 20:15 ` [PATCH 08/14] target/spc: Expose ATO bit in control mode page Nicholas A. Bellinger
2014-01-10 20:57 ` Martin K. Petersen
2014-01-08 20:15 ` [PATCH 09/14] target/configfs: Expose protection device attributes Nicholas A. Bellinger
2014-01-09 11:01 ` Sagi Grimberg
2014-01-10 7:00 ` Nicholas A. Bellinger
2014-01-12 11:56 ` Sagi Grimberg
2014-01-10 21:01 ` Martin K. Petersen
2014-01-12 12:18 ` Sagi Grimberg
2014-01-12 12:43 ` Martin K. Petersen
2014-01-12 12:52 ` Sagi Grimberg
2014-01-13 18:30 ` Nicholas A. Bellinger
2014-01-13 18:52 ` James Bottomley
2014-01-13 19:27 ` Nicholas A. Bellinger
2014-01-13 19:43 ` James Bottomley
2014-01-13 20:19 ` Martin K. Petersen
2014-01-13 20:24 ` James Bottomley
2014-01-13 20:30 ` Martin K. Petersen [this message]
2014-01-08 20:15 ` [PATCH 10/14] target: Add protection SGLs to target_submit_cmd_map_sgls Nicholas A. Bellinger
2014-01-08 20:15 ` [PATCH 11/14] target/rd: Refactor rd_build_device_space + rd_release_device_space Nicholas A. Bellinger
2014-01-08 20:15 ` [PATCH 12/14] target/rd: Add support for protection SGL setup + release Nicholas A. Bellinger
2014-01-08 20:15 ` [PATCH 13/14] target/rd: Add DIF protection into rd_execute_rw Nicholas A. Bellinger
2014-01-09 10:32 ` Sagi Grimberg
2014-01-10 6:52 ` Nicholas A. Bellinger
2014-01-12 11:53 ` Sagi Grimberg
2014-01-13 19:22 ` Nicholas A. Bellinger
2014-01-10 21:06 ` Martin K. Petersen
2014-01-12 12:23 ` Sagi Grimberg
2014-01-08 20:15 ` [PATCH 14/14] tcm_loop: Enable DIF/DIX modes in SCSI host LLD Nicholas A. Bellinger
2014-01-10 21:09 ` Martin K. Petersen
2014-01-13 18:45 ` Nicholas A. Bellinger
2014-01-13 20:08 ` Martin K. Petersen
2014-01-10 2:00 ` [PATCH 00/14] target: Initial support for DIF Type1+Type3 emulation Martin K. Petersen
2014-01-10 5:57 ` Nicholas A. Bellinger
2014-01-15 18:03 ` sagi grimberg
2014-01-15 21:55 ` Nicholas A. Bellinger
2014-01-16 1:42 ` Martin K. Petersen
2014-01-16 2:32 ` Nicholas A. Bellinger
2014-01-16 3:04 ` Martin K. Petersen
2014-01-16 7:45 ` sagi grimberg
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