Paul, Thanks.
I understand now. Fred > -----Original Message----- > From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of Paul Kraus > Sent: 星期一, 十月 24, 2011 22:38 > To: ZFS Discussions > Subject: Re: [zfs-discuss] FS Reliability WAS: about btrfs and zfs > > On Sat, Oct 22, 2011 at 12:36 AM, Paul Kraus <p...@kraus-haus.org> > wrote: > > > Recently someone posted to this list of that _exact_ situation, they > loaded > > an OS to a pair of drives while a pair of different drives containing > an OS > > were still attached. The zpool on the first pair ended up not being > able to > > be imported, and were corrupted. I can post more info when I am back > in the > > office on Monday. > > See the thread started on Tue, Aug 2, 2011 at 12:23 PM with a > Subject of "[zfs-discuss] Wrong rpool used after reinstall!", the > followups, and at least one additional related thread. > > While I agree that you _should_ be able to have multiple unrelated > boot environments on hard drives at once, it seems prudent to me to > NOT do such. I assume you _can_ manage multiple ZFS based boot > environments using Live Upgrade (or whatever has replaced it in 11). > NOTE that I have not done such (managed multiple ZFS boot environments > with Live Upgrade), but I ASSUME you can. > > I suspect that the "root" of this potential problem is in the ZFS > boot code and the use of the same zpool name for multiple zpools at > once. By having the boot loader use the zpool directly you get the > benefit of having the redundancy of ZFS much earlier in the boot > process (the only thing that appears to load off of a single drive is > the boot loader, everything from there on loads from the mirrored > zpool, at least on my NCP 3 system, my first foray into ZFS root). The > danger is that if there are multiple zpools with the same (required) > name, then the boot loader may become confused, especially if drives > get physically moved around. > > -- > {--------1---------2---------3---------4---------5---------6---------7- > --------} > Paul Kraus > -> Senior Systems Architect, Garnet River > ( http://www.garnetriver.com/ ) > -> Sound Coordinator, Schenectady Light Opera Company ( > http://www.sloctheater.org/ ) > -> Technical Advisor, RPI Players > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
