root@jonipekka-desktop:~# zpool import
pool: rpool
id: 5077426391014001687
state: UNAVAIL
status: One or more devices are faulted.
action: The pool cannot be imported due to damaged devices or data.
config:
rpool UNAVAIL insufficient
replicas
ata-WDC_WD4005FZBX-00K5WB0_V6GAE1PR-part1 ONLINE
ata-WDC_WD4005FZBX-00K5WB0_VBGDM25F-part4 FAULTED corrupted data
root@jonipekka-desktop:~#
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https://bugs.launchpad.net/bugs/1906542
Title:
echo 1 >> /sys/module/zfs/parameters/zfs_max_missing_tvds says
premission error, unable to reapair lost zfs pool data
Status in zfs-linux package in Ubuntu:
New
Bug description:
root@jonipekka-desktop:~# echo 1 >>
/sys/module/zfs/parameters/zfs_max_missing_tvds
-bash: /sys/module/zfs/parameters/zfs_max_missing_tvds: Permission denied
root@jonipekka-desktop:~#
https://www.delphix.com/blog/openzfs-pool-import-recovery
Import with missing top level vdevs
The changes to the pool configuration logic have enabled another great
improvement: the ability to import a pool with missing or faulted top-
level vdevs. Since some data will almost certainly be missing, a pool
with missing top-level vdevs can only be imported read-only, and the
failmode is set to “continue” (failmode=continue means that when
encountering errors the pool will continue running, as opposed to
being suspended or panicking).
To enable this feature, we’ve added a new global variable:
zfs_max_missing_tvds, which defines how many missing top level vdevs
we can tolerate before marking a pool as unopenable. It is set to 0 by
default, and should be changed to other values only temporarily, while
performing an extreme pool recovery.
Here as an example we create a pool with two vdevs and write some data
to a first dataset; we then add a third vdev and write some data to a
second dataset. Finally we physically remove the new vdev (simulating,
for instance, a device failure) and try to import the pool using the
new feature.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: zfsutils-linux 0.7.5-1ubuntu16.10
ProcVersionSignature: Ubuntu 4.15.0-126.129-generic 4.15.18
Uname: Linux 4.15.0-126-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.9-0ubuntu7.20
Architecture: amd64
Date: Wed Dec 2 18:39:58 2020
InstallationDate: Installed on 2020-12-02 (0 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64
(20180725)
SourcePackage: zfs-linux
UpgradeStatus: No upgrade log present (probably fresh install)
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