Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes

From: Jamie Lokier
Date: Tue May 20 2008 - 19:48:53 EST

Ric Wheeler wrote:
> The hard thing is to figure out how to test this kind of scenario
> without dropping power.

Apart from using virtual machines, you mean?

> To expose the failure mode, it might be
> sufficient to drop power to a drive with smartctl (or, if you have hot
> swap bays, just pull them).

I wonder, does sending any kind of reset commands to drives cause them
to discard their write cache?

If the hot swap power switch is accessible from software, that would
be a nice trick :-)

-- Jamie
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at