Date: Wed, 28 Sep 2016 20:28:06 -0500 From: Brandon J. Wandersee <brandon.wandersee@gmail.com> To: Victor Sudakov <vas@mpeks.tomsk.su> Cc: Michael Schuster <michaelsprivate@gmail.com>, freeBSD Mailing List <freebsd-questions@freebsd.org>, Mike Tancsa <mike@sentex.net> Subject: Re: complete clone/restore from a ZFS-based system replication stream Message-ID: <868tub1om1.fsf@WorkBox.Home> In-Reply-To: <20160928164601.GA28493@admin.sibptus.transneft.ru> References: <20160926154720.GA75556@admin.sibptus.transneft.ru> <688eec35-bc7b-ae05-b765-106933b522d1@sentex.net> <20160928145137.GA27497@admin.sibptus.transneft.ru> <ee590b5a-36ff-6e99-3390-715587dbb5d7@sentex.net> <20160928154941.GB27823@admin.sibptus.transneft.ru> <0f4490dc-34e3-3caa-7aa7-a2a284ed0ffd@sentex.net> <CADqw_g%2B6rSXPs0-j2T8s0ey5mkgSR0GyfbgbyoevmkmkJwMhrw@mail.gmail.com> <20160928164601.GA28493@admin.sibptus.transneft.ru>
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Victor Sudakov writes: > Michael Schuster wrote: >> the FreeBSD Mastery: ZFS books (for example) explain how to avoid this >> issue too. > > Namely? Or should I buy the book? > > Of course, I can do with glabel or something, but it's a pity > bsdinstall creates an unclonable configuration. It's not a bsdinstall problem. It's really only a problem at all if particular circumstances arise---like if you move a disk from a one-disk system to another, multi-disk system. Device nodes are assigned based either on the order in which the motherboard firmware detects and initializes the devices, or the ports into which the devices are plugged. Which one gets used depends on your motherboard, and if it's the former, nobody has any control over it. Your backup-and-restoration plan needs to take that into account. That's why partition/filesystem labels were invented in the first place. It's why a Windows disk can be transplanted into any slot on any machine, and it can boot without intervention from the user---the filesystems are all labeled. Since swap was the example you brought up I'm guessing that's your chief concern, since a ZFS pool is usually unaffected by a change in drive letters. In that case, just modify /etc/fstab before rebooting or transplanting the disk. -- :: Brandon J. Wandersee :: brandon.wandersee@gmail.com :: -------------------------------------------------- :: 'The best design is as little design as possible.' :: --- Dieter Rams ----------------------------------
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