Re: CAM timeouts on boot (13.0-p8, Dell R730xd, mrsas controller)

From: George Michaelson <>
Date: Fri, 01 Apr 2022 03:40:39 UTC
I checked /boot/zfs/zpool.cache and /etc/zfs/zpool.cache both have the
tank in question, zdb agrees, they are identical, multiple reboots
re-tested: without a manual zpool import tank, only the zfs zroot
which is magically mounted appears. The other tank does not unless you
call it into being. Doing that after multiuser/daemon is bad if your
daemons work in it. (and bad for NFS exports)

The zfs pages are a bit cryptic about altroot and other zpool get all
values, but the basics seem to be that if you do zpool import, and its
in cache, then it should be detected during zfs/zpool activation.
People expect that once you import, it will re-import automatically
thereafter unless you tell it not to. I checked zpool values on a
system which doesnt have the problem and I don't see any variance for
zpool params.  zpool.cache was the recommended "have you checked"

Not that this can't be PBCAK, but I have tried not to be the root
cause here. It happened across my upgrade, and the CAM timeout
intruded in the same window.


On Fri, Apr 1, 2022 at 1:31 PM George Michaelson <> wrote:
> Thanks for the cluestick. I don't disagree with anything you said btw.
> Here's the dmesg.  (attachment, can in-line if thats better)