From: "Paul Schroeder" <prq@Safe-mail.net>
To: linux-btrfs@vger.kernel.org
Subject: How to know whether disks "handle flush requests correctly"
Date: Fri, 6 May 2011 05:13:11 -0400 [thread overview]
Message-ID: <N1-HLiSwHA1HL@Safe-mail.net> (raw)
The btrfs wiki Main Page warns that "it is currently possible to corrupt
a filesystem irrecoverably if your machine crashes or loses power on disks
that don't handle flush requests correctly."
How do you know if this applies to your drives? Is there a way to test it,
or a model list, or are newer SATA drives (magnetic, not SSDs) always ok?
Does it depend on the controller? (I have a SiI 3114, latest BIOS.)
I would also be using btrfs on top of dm-crypt (with the latest release
kernel). Some kernel versions ago, the message that write barriers aren't
supported disappeared; can I assume the device mapper / dm-crypt is not a
problem with regards to flushing?
Paul
next reply other threads:[~2011-05-06 9:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-06 9:13 Paul Schroeder [this message]
2011-05-06 13:10 ` How to know whether disks "handle flush requests correctly" Josef Bacik
2011-05-06 13:48 ` Chris Mason
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