https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224536
Bug ID: 224536
Summary: FLUSHCACHE48 AHCI Timeouts on SMR Drives
Product: Base System
Version: 11.1-STABLE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: freebsd-bugs@FreeBSD.org
Reporter: ilge...@yahoo.it
Hi!
Starting from this thread:
https://forums.freenas.org/index.php?threads/a-long-journey-to-solve-cam-status-command-timeout-issues.59549/
I had hard times troubleshooting this issue on FreeNAS with 4 x ST8000AS0002
Drives.
It seems that drives increase latency over time and exceed the AHCI
(hardcoded?) 31000 msec timeout.
It will be great if FreeBSD could support these new SMR drives without
disabling cache flushing on ZFS.
Thanks,
Fabio
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