On 03/21/18 12:07, Hartmann, O. wrote:
Hello.
Incident: CURRENT r331284 can be brought down reliably with an USB
flash drive plugged in and out without mounting or doing anything with
it.
I first recognized the incident with a ZFS on a SanDisk 32GB USB 3.0
flash drive. Plugging the USB flash and typing "zpool import" revealed
the very first time I issue this command the existence of the ZFS
fielsystem. Usually, I import then this USB drive for maintenance
purposes. Now, typing "zpool import" a second time, nothing is shown at
all. I see that umass0 has been destroyed - although the USB drive is
still plugged in.
Pulling the USB flash drive without having actually imported the
ZFS makes CURRENT crash and reboot.
I tried different USB flash drives, 3.0, 2.0, different boxes running
CURRENT, different hardware (Notebooks, Fujitsu workstations, HP
servers). It seems that the USB subsystem does have a serious problem -
not the ZFS. I can plugin the USB and then unplug it and after two or
three times doing this, the box goes down.
Does anyone else observe this bug?
By the way: all ZFS USB drives I use or all other USB flash drives
cause no problem on FreeBSD 11.1-RELENG-p7!
I've seen something similar, but I thought the issue was fixed by:
https://reviews.freebsd.org/D14456
--HPS
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