linux-ext4 - Battery backed ramdisk for fs journal

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Message-ID: <51357352.70804@ubuntu.com>
Date:	Mon, 04 Mar 2013 23:23:46 -0500
From:	Phillip Susi <psusi@...ntu.com>
To:	linux-ext4@...r.kernel.org
Subject: Battery backed ramdisk for fs journal

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It seems to me that the ideal device to hold an external journal is a
battery backed RAM based MTD device.  Does such a beast exist?

As an alternative, has anyone considered or implemented a more
conventional ramdisk that would be preserved across a kexec crash, in
conjunction with an oversized UPS and NUT configured to suspend the
system with plenty of battery power left?

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