> A while back, I posted here about the issues ZFS has with USB hotplugging > of ZFS formatted media when we were trying to plan an external media backup > solution for time-slider: > http://www.opensolaris.org/jive/thread.jspa?messageID=299501 [...]
> There are a few minor issues however which I'd love to get some feedback on > in addition > to the overall direction of this proposal: > > 1. When the external device is disconnected, the zpool status output reports > that the > pool is in a degraded state and displays a status message that indicates > that there > was an unrecoverable error. While this is all technically correct, and is > appropriate > in the context of a setup where it is assumed that the mirrored device is > always > connected, it might lead a user to be unnecessarily alarmed when his > "backup" mirror > disk is not connected. We're trying to use a mirror configuration here in > a manner that > is a bit different than the conventional manner, but not in any way that > it's not designed > to cope with. [...] > So I'd like to ask if this is an appropriate use of ZFS mirror functionality? > It has many benefits > that we really should take advantage of. Yes, by all means. I am doing something very similar on my T1000, but I have two separate one-disk pools and copy to the backup pool using rsync. I would very much like to replace this with automatic resilvering. One prerequisite for wide adoption would be to fix the issue #1 you described above. I would advise not to integrate this anywhere before fixing that "degraded" display. BTW is this USB-specific? While it seems to imply that, you don't state it anywhere explicitly. I attach my backup disk via eSATA, power it up, import the pool, etc. Not really hotplugging... Regards -- Volker -- ------------------------------------------------------------------------ Volker A. Brandt Consulting and Support for Sun Solaris Brandt & Brandt Computer GmbH WWW: http://www.bb-c.de/ Am Wiesenpfad 6, 53340 Meckenheim Email: v...@bb-c.de Handelsregister: Amtsgericht Bonn, HRB 10513 Schuhgröße: 45 Geschäftsführer: Rainer J. H. Brandt und Volker A. Brandt _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
