Today I found my NAS stop working.
Here are some feature of the problems:
1. ZFS module not loaded since Jul 1 07:00:33
It must be the problem about reboot, because I set a routine reboot (in /etc/crontab) at 7:00 am in first day of every month. It never showed error till today.
It seems that ZFS module collapsed as I reboot (Maybe ZFS is working then. I had set an auto snapshot at 3:00 am and destory at 5:00 am every day)
Other informations were also support the ZFS-collapse hypothesis. For example, there are some error imformation in web GUI:
When try /sbin/modprobe zfs
At the same time, S.M.A.R.T was also stopped, but I'm not sure the relationship between them:
Failed to execute command 'export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin; export LANG=C.UTF-8; smartctl -x '/dev/sda' 2>&1' with exit code '1': smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.5.0-0.bpo.2-amd64] (local build) Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org /var/lib/smartmontools/drivedb/drivedb.h(5775): Syntax error, '"' expected
2. Disks are not damaged.
Considering reboot sometimes may damage disks, I try fdisk -l:
They were all be identified by system, so I think the disk is OK.
3. system information of my NAS:
ZFS is not working now, causing all files not available for visit. It's mostly likely to be the loss of ZFS module.
How to fix it?