Date: Fri, 14 Sep 2018 03:58:13 +0700 From: Eugene Grosbein <eugen@grosbein.net> To: Mike Tancsa <mike@sentex.net>, FreeBSD-STABLE Mailing List <freebsd-stable@FreeBSD.org> Subject: Re: ZFS: i/o error - all block copies unavailable Message-ID: <28d33017-bc79-171b-08bc-04fe6dc9804a@grosbein.net> In-Reply-To: <2fc1f80f-c92d-4b9a-18a5-88718b076ac5@sentex.net> References: <2fc1f80f-c92d-4b9a-18a5-88718b076ac5@sentex.net>
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14.09.2018 3:42, Mike Tancsa wrote: > I have been getting the above error at boot time (I think) for some time > even though the box boots just fine. The server boots from a pair of > SSDs in mirror and then a number of other pools off different > controllers get mounted. All the pools show fine but I am curious if > this error will come to something worse in the future. Googling around > seems to point to different issues and goes back to RELENG8 days. The > box is AMD64, RELENG_11 r338656 > > drive R: is disk15 \ > BIOS drive S: is disk16 > \ > BIOS drive T: is disk17 > \ > BIOS drive U: is disk18 > \ > ZFS: i/o error - all block copies unavailable > \ > ZFS: i/o error - all block copies unavailable > > BIOS 603kB/1915980kB available memory > - > > \ > FreeBSD/x86 ZFS enabled bootstrap loader, Revision 1.1 > - > \ > Loading /boot/defaults/loader.conf > - > > ... normal boot after that > > > pool: zroot > state: ONLINE > scan: resilvered 38.6G in 0h2m with 0 errors on Tue Sep 4 14:06:40 2018 > config: > > NAME STATE READ WRITE CKSUM > zroot ONLINE 0 0 0 > mirror-0 ONLINE 0 0 0 > gpt/zfs0 ONLINE 0 0 0 > ada1p3 ONLINE 0 0 0 > > errors: No known data errors > > ada1 was replaced recently as its wear level was reaching 0, but the > errors were there prior to replacement Do you use MBR or GPT for boot mirror? If that is MBR, the error seems to come from zfsboot(8) that has small stripped-down read-only implementation of ZFS that may lack support for some of zpool-features(7), so you will not see any problems checking boot pool after kernel has loaded full-blown ZFS code.
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