Date: Wed, 13 May 2020 06:46:27 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 224496] mpr and mps drivers seems to have issues with large seagate drives Message-ID: <bug-224496-227-HrkbKB9TgC@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-224496-227@https.bugs.freebsd.org/bugzilla/> References: <bug-224496-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D224496 --- Comment #44 from Sharad Ahlawat <freebsd@diyit.org> --- (In reply to Matthias Pfaller from comment #43) logs shows the read events are still timing out, even with 90 also there are no retry messages, is "sysctl kern.cam.da.retry_count" set t= o 0 ? you could try a few things to get to the root cause: a: also disable ZFS cache flush sysctl vfs.zfs.cache_flush_disable=3D1 even though your drives are not SMRs b: experiment with larger timeout values also observe "gstat" output and ensure the first column L(q) is continually returning to zero and not getting stuck for any of the drives c: try setting reducing the SCIC speed to 3.0 in the controller settings; j= ust to eliminate some disk firmware speed compatibility issue. Side note, not sure if this applies to your drives but a few of mine don't support NCQ TRIM and are not properly driver blacklisted, so I had to set vfs.unmapped_buf_allowed=3D0 in loader.conf --=20 You are receiving this mail because: You are the assignee for the bug.=
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