https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=204484
Bug ID: 204484
Summary: ZFS caches on 4K GELI devices accumulate inordinate
write errors
Product: Base System
Version: 10.2-RELEASE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
When zpool creates a cache on a GELI device providing 4K sectors the pool
immediately reports message ZFS-8000-9P. The cache device experiences an
inordinate number of write errors -- over a million write errors a day (about
11.8 per second).
Using a GELI device with 512b sectors does not exhibit this problem but, of
course, degrades encryption performance.
This appears to be the same bug as FreeNAS Bugs #6734
(https://bugs.freenas.org/issues/6734) and #7092
(https://bugs.freenas.org/issues/7092), although I'm unclear why they consider
the former resolved.
I don't imagine it matters, but the underlying drive sector size is 512 logical
/ 512 physical.
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