Date: Fri, 3 Dec 2010 07:29:44 +0100 From: Mateusz Marzantowicz <mmarzantowicz@gmail.com> To: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: DTrace (or other monitor) access to LBA of a block device Message-ID: <AANLkTimDWtCObB02WmNLpEOXn_r2k8ZcNK6LXZckCt7i@mail.gmail.com> In-Reply-To: <AANLkTi=2Ln5s-mD%2B%2B-iKEq2v-1f31fpavXB7kUfTC2Lf@mail.gmail.com> References: <AANLkTi=2Ln5s-mD%2B%2B-iKEq2v-1f31fpavXB7kUfTC2Lf@mail.gmail.com>
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On Thu, Dec 2, 2010 at 10:33 PM, Thomas Zander < thomas.e.zander@googlemail.com> wrote: > Hi, > > do we have any way to monitor which LBAs of which block device are > read/written at a given time? > > I stumbled upon this, > http://southbrain.com/south/2008/02/fun-with-dtrace-and-zfs-mirror.html > > which is pretty intriguing. Unfortunately on FreeBSD we do not have > the DTrace io provider, so his dtrace script would not work. > Do we have another option to monitor block device access in a similar > fashion? > > Regards, > Riggs > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" > I'm happy FreeBSD user and not a developer but as far as I know (see: http://www.freebsd.org/doc/en/books/arch-handbook/driverbasics-block.html) there is no such thing like block device in FreeBSD. It might be possible to do what you want in other way or with different type of device. Regards, Mateusz Marzantowicz
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