Date: Fri, 28 Feb 2020 08:51:39 -0500 From: "James B. Byrne" <byrnejb@harte-lyne.ca> To: freebsd-questions@freebsd.org Subject: ZFS i/o error on boot unable to start system Message-ID: <eb8f8f32fcf5559774daf3a772a1ad2e.squirrel@webmail.harte-lyne.ca>
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I have reported this on the forums as well. FreeBSD-12.1p2 raidz2 on 4x8TB HDD (reds) root on zfs We did a hot restart of this host this morning and received the following on the console: ZFS: i/o error - all block copies unavailable ZFS: failed to read pool zroot directory object qptzfsboot: failed to mount default pool zroot FreeBSD/x86 boot ZFS: i/o error - all block copies unavailable ZFS: can't fild dataset 0 Default: zroot/<0x0> boot: What has happened? How do I get this system back up and online? My first thought is that in modifying rc.conf to change some ip4 address assignments that I may have done something else inadvertently which has caused this. I cannot think of any other changes made since the system was last restarted a noon yesterday. ​This is an urgent matter. Any help is gratefully welcomed. -- *** e-Mail is NOT a SECURE channel *** Do NOT transmit sensitive data via e-Mail Do NOT open attachments nor follow links sent by e-Mail James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3
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