Date: Wed, 10 Oct 2018 15:16:47 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 232152] unrecoverable state after zroot is filled with data to 100%, can't boot, can't import Message-ID: <bug-232152-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D232152 Bug ID: 232152 Summary: unrecoverable state after zroot is filled with data to 100%, can't boot, can't import Product: Base System Version: 11.1-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: petr.fischer@me.com My experience on virtual server: I accidentally filled the zroot zpool with data to the 100% of capacity (available ZFS space exactly 0). Then, it's not possible to boot, just because it's not possible to import z= root pool anymore. When I booted from FreeBSD 11.1-RELEASE Install CD ROM (Live CD option), I can't import the zroot pool with: zpool import zroot Command never ends, zpool process is in "tx->tx" state forever, CPU utiliza= tion is 0%, interrupts 0%, idle 100%. When I try to import filled zroot in readonly mode, yes, that works! But in readonly mode, you can't delete data or snapshots. So it looks like game over. Maybe ZFS is not able to do any commit records anymore on 100% filled pool, I don't know... There is only 512MB (+ 1GB swap) on my virtual server, but 2 years without = any problem with ZFS (hourly snapshots, zfs send for backup, everything works l= ike a charm). Is it really that dangerous to fill the zpool with data to 100%? Such a situation will be simple to simulate: 1) install FreeBSD on the ZFS 2) fill some dataset with random data to the 100% of capacity 3) check with zfs command, if there is really 0 bytes available space 4) reboot 5) gameover --=20 You are receiving this mail because: You are the assignee for the bug.=
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