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[ANNOUNCE] xfs: Supporting Host Aware SMR Drives

To: xfs@xxxxxxxxxxx
Subject: [ANNOUNCE] xfs: Supporting Host Aware SMR Drives
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Mon, 16 Mar 2015 17:00:20 +1100
Cc: linux-fsdevel@xxxxxxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
User-agent: Mutt/1.5.21 (2010-09-15)
Hi Folks,

As I told many people at Vault last week, I wrote a document
outlining how we should modify the on-disk structures of XFS to
support host aware SMR drives on the (long) plane flights to Boston.

TL;DR: not a lot of change to the XFS kernel code is required, no
specific SMR awareness is needed by the kernel code.  Only
relatively minor tweaks to the on-disk format will be needed and
most of the userspace changes are relatively straight forward, too.

The source for that document can be found in this git tree here:


in the file design/xfs-smr-structure.asciidoc. Alternatively,
pull it straight from cgit:


Or there is a pdf version built from the current TOT on the xfs.org
wiki here:


Happy reading!


Dave Chinner

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