From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Michael Monnerie <michael.monnerie@is.it-management.at>
Cc: xfs@oss.sgi.com
Subject: Re: LWN article: 4K disk sectors
Date: Thu, 12 Mar 2009 10:23:30 -0400 [thread overview]
Message-ID: <yq1bps6q0pp.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <200903121452.16419@zmi.at> (Michael Monnerie's message of "Thu\, 12 Mar 2009 14\:52\:16 +0100")
>>>>> "Michael" == Michael Monnerie <michael.monnerie@is.it-management.at> writes:
Michael> I thought that it's a limitation of the Linux kernel in more
Michael> parts than just the filesystem (like block cache), that sector
Michael> sizes must be 512B.
Nope. We've supported bigger sector sizes for years because of CD-ROMs,
mainframe DASD, etc.
Michael> If I had a 4K drive, would that be usable with XFS already?
# cat /sys/block/sdc/queue/hw_sector_size
4096
# xfs_info /mnt
meta-data=/dev/sdc1 isize=256 agcount=16, agsize=5113686 blks
= sectsz=4096 attr=0
data = bsize=4096 blocks=81818976, imaxpct=25
= sunit=0 swidth=0 blks, unwritten=1
naming =version 2 bsize=4096
log =internal bsize=4096 blocks=32768, version=2
= sectsz=4096 sunit=1 blks, lazy-count=0
realtime =none extsz=4096 blocks=0, rtextents=0
--
Martin K. Petersen Oracle Linux Engineering
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next prev parent reply other threads:[~2009-03-12 14:26 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-12 11:58 LWN article: 4K disk sectors Michael Monnerie
2009-03-12 13:10 ` Eric Sandeen
2009-03-12 13:52 ` Michael Monnerie
2009-03-12 14:17 ` Martin Steigerwald
2009-03-12 15:03 ` Eric Sandeen
2009-03-14 19:10 ` Martin Steigerwald
2009-03-12 14:23 ` Martin K. Petersen [this message]
2009-03-12 14:58 ` Eric Sandeen
2009-03-14 15:26 ` Christoph Hellwig
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