From: Stan Hoeppner <stan@hardwarefreak.com>
To: Subranshu Patel <spatel.ml@gmail.com>
Cc: xfs@oss.sgi.com
Subject: Re: Xfs_repair and journalling
Date: Sun, 17 Mar 2013 00:26:32 -0500 [thread overview]
Message-ID: <51455408.4070801@hardwarefreak.com> (raw)
In-Reply-To: <CAEUQceh-Xcabr0KErxF6EAdafDDP1PY_AeHwgYB82QeUdyGp-g@mail.gmail.com>
On 3/16/2013 10:56 AM, Subranshu Patel wrote:
> This is not observed in EXT4, fsck successfully recovers without
> mounting the filesystem.
And this is the real problem. You're *assuming* XFS should behave in
the same manner as EXT4. Why would you assume a Ferrari should behave
like a Tata Nano?
XFS is far more sophisticated than EXT4 in many, many ways, including
recovery after unclean shutdown. XFS kernel code performs journal
playback/recovery automatically when the filesystem is mounted.
xfs_repair is a tool for fixing filesystems that are broken, not simply
in need of journal playback. Thus xfs_repair has no code to perform
journal recovery.
EXT4 (and EXT3) lacks this sophistication and must call a user space
tool, e2fsck, to perform journal playback/recovery.
XFS is the Ferrari of Linux filesystems and EXT is the Tata. Keep that
in mind as you discover many of the other differences in the future.
--
Stan
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next prev parent reply other threads:[~2013-03-17 5:26 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-16 15:56 Xfs_repair and journalling Subranshu Patel
2013-03-17 2:22 ` Stan Hoeppner
2013-03-17 3:01 ` Michael L. Semon
2013-03-17 5:26 ` Stan Hoeppner [this message]
2013-03-17 11:42 ` Subranshu Patel
2013-03-17 14:50 ` Stan Hoeppner
2013-03-17 15:18 ` Matthias Schniedermeyer
2013-03-17 23:20 ` Dave Chinner
2013-03-18 18:22 ` Ben Myers
2013-03-18 20:58 ` Martin Steigerwald
2013-03-18 20:50 ` Martin Steigerwald
2013-03-19 4:02 ` Eric Sandeen
2013-03-19 6:19 ` Stan Hoeppner
2013-03-19 8:24 ` Martin Steigerwald
2013-03-19 10:14 ` Stan Hoeppner
2013-03-30 12:49 ` Xfs_repair and journalling -- EXT4 journal replay discussion Stan Hoeppner
2013-03-30 17:40 ` Eric Sandeen
2013-03-30 18:52 ` Stan Hoeppner
2013-03-30 20:21 ` Eric Sandeen
2013-03-31 11:24 ` Stan Hoeppner
2013-03-31 2:03 ` Dave Chinner
2013-03-31 1:35 ` Dave Chinner
2013-03-18 20:37 ` Xfs_repair and journalling Martin Steigerwald
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