From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Jeff Moyer <jmoyer@redhat.com>
Cc: Ibragimov Rinat <ibragimovrinat@mail.ru>, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH][RFC]ext4 on 4k-sector drives without read-modify-write support
Date: Mon, 28 Feb 2011 09:58:55 -0500 [thread overview]
Message-ID: <yq1sjv8p5n4.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <x49sjv85i00.fsf@segfault.boston.devel.redhat.com> (Jeff Moyer's message of "Mon, 28 Feb 2011 09:52:15 -0500")
>>>>> "Jeff" == Jeff Moyer <jmoyer@redhat.com> writes:
>> I have a proposal about 4k-sector hard drives support in fs drivers.
>> Toshiba MK1231GAL is an 1.8" LIF IDE drive. It has 4096-byte physical
>> and 512-byte logical sectors [1]. Unlike others drives with Advanced
>> Format, it has not read-modify-write logic, so it can only operate
>> with 4k blocks. Fortunately some filesystems in linux (I tested jfs,
Jeff> Then it should report a logical block size of 4k. You have a
Jeff> drive with broken firmware.
Several vendors are contemplating something similar.
I.e. keep the 512-byte addressing to avoid implementing support for 4KB
logical blocks in the OS ATA stack. But the drive will reject I/Os that
are not naturally aligned multiples of 4KB.
I agree it's totally broken. But I suspect we'll be seeing more of
these... :(
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2011-02-28 14:59 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-26 18:24 [PATCH][RFC]ext4 on 4k-sector drives without read-modify-write support Ibragimov Rinat
2011-02-28 14:52 ` Jeff Moyer
2011-02-28 14:58 ` Martin K. Petersen [this message]
2011-02-28 18:09 ` Ted Ts'o
2011-02-28 20:19 ` Martin K. Petersen
2011-02-28 21:05 ` Ted Ts'o
2011-02-28 21:10 ` Jeff Moyer
2011-02-28 21:22 ` Ted Ts'o
2011-02-28 21:57 ` Jeff Moyer
2011-03-01 15:19 ` Martin K. Petersen
2011-02-28 21:20 ` James Bottomley
2011-02-28 21:24 ` Ted Ts'o
2011-02-28 21:23 ` Martin K. Petersen
2011-02-28 22:52 ` [PATCH][RFC]ext4 on 4k-sector drives without read-modify-writesupport Ibragimov Rinat
2011-03-01 22:16 ` Ibragimov Rinat
2011-03-10 17:01 ` Ibragimov Rinat
2011-02-28 17:54 ` [PATCH][RFC]ext4 on 4k-sector drives without read-modify-write support Ibragimov Rinat
2012-09-27 11:41 ` Mike
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