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Problem ======= When we fail to open or import a storage pool, we typically don't get any additional diagnostic information, just "no pool found" or "can not import". While there may be no additional user-consumable information, we should at least make this situation easier to debug/diagnose for developers and support. For example, we could start by using `zfs_dbgmsg()` to log each thing that we try when importing, and which things failed. E.g. "tried uberblock of txg X from label Y of device Z". Also, we could log each of the stages that we go through in `spa_load_impl()`. Solution ======== Following the cleanup to `spa_load_impl()`, debug messages have been added to every point of failure in that function. Additionally, debug messages have been added to strategic places, such as `vdev_disk_open()`. Authored by: Pavel Zakharov <pavel.zakharov@delphix.com> Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Andrew Stormont <andyjstormont@gmail.com> Approved by: Dan McDonald <danmcd@joyent.com> Ported-by: Tim Chase <tim@chase2k.com> Signed-off-by: Tim Chase <tim@chase2k.com> OpenZFS-issue: https://illumos.org/issues/8961 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/418079e0 Closes #7459 |
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ZFS on Linux is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community.
Official Resources
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Full documentation for installing ZoL on your favorite Linux distribution can be found at our site.
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