Date: Sun, 20 Nov 2022 14:39:14 +0000 From: void <void@f-m.fm> To: freebsd-fs@freebsd.org Subject: Re: zfs properties across versions Message-ID: <Y3o8Ehwxy2K1Jy0v@sysmon.zyxst.net> In-Reply-To: <1E43A143-D308-4ED9-A8C7-650F2FACB2A3@yahoo.com> References: <1E43A143-D308-4ED9-A8C7-650F2FACB2A3.ref@yahoo.com> <1E43A143-D308-4ED9-A8C7-650F2FACB2A3@yahoo.com>
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On Sat, Nov 19, 2022 at 11:04:41PM -0800, Mark Millard wrote: >void <void_at_f-m.fm> wrote on >Date: Sat, 19 Nov 2022 19:56:45 UTC : > >> I'm worried if I zfs snapshot a vdev running zfs v5 (on 12.3R) to a >> 13.1-p3 receiving system (so OpenZFS) that I'll not be able to restore >> subsequently. >> >> Will restoring from 13.1-p3 to 12.3R be expected to work? > >If you list the pool features for the relevant pools, >does the pool on 13.1-p3 have anything active that >the 12.3R pool does not? How about at the time of the >transfer back to 12.3R? Still true? Such are some of >the more detailed questions involved. > >(The following is from main [so: 14] but is just to >give an idea.) > ># zpool get all | grep feature@ | sort -k4 >zoptb feature@embedded_data active local >zoptb feature@empty_bpobj active local Thanks for that Mark. I think what I'll need to do is to make a 12.3-R instance and then compare. When the source instance was installed, it was FreeBSD 12.0-RELEASE-p3 GENERIC. If the comparison doesn't exactly match, I could install I guess that 12.0 version instance, and then upgrade the OS to where it is now.. It's not important that it's not the most direct way of doing it, but it's *very* important that the destination can be restored-from. --
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