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Message-ID: <20090417210700.GD10554@vanheusden.com> Date: Fri, 17 Apr 2009 23:07:01 +0200 From: Folkert van Heusden <folkert@...heusden.com> To: Anton Ertl <anton@...s.complang.tuwien.ac.at> Cc: linux-kernel@...r.kernel.org Subject: Re: Out-of-order writing by disk drives > I have released a new version of hdtest, a program that tests whether > hard disks write out-of-order relative to the order that the writes > were passed to them from the OS. You find the program at > http://www.complang.tuwien.ac.at/anton/hdtest/ Not sure if it matters but it seems open-iscsi (both target and initiator are linux systems) works fine with respect to the write barriers: while running hdtest on an iscsi device I suddenly stopped the traffic flowing using an iptables DROP-rule. Then of course I stopped the iscsi initiator, removed the rules, restarted the initator and ran hdcheck: all above the line have the correct magic. Folkert van Heusden -- www.vanheusden.com/multitail - win een vlaai van multivlaai! zorg ervoor dat multitail opgenomen wordt in Fedora Core, AIX, Solaris of HP/UX en win een vlaai naar keuze ---------------------------------------------------------------------- Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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