ZFS¶
As described earlier, we use ZFS because it is one of the few file systems that can detect and correct bitrot. At time of writing, Ubuntu is the only major Linux variant to support ZFS out of the box.
The current setup¶
Note
We inherited our data storage pool “tank” from the previous FreeNAS install, so there is currently no discussion of how to setup and configure a ZFS pool and datasets.
We import the pool with zpool import -f tank. Since this computer will be
used as a NAS, we don’t limit the size of the ARC, which defaults to half the
RAM.
sudo install zfsutils
We currently have the following file systems (“datasets”) for bulk storage:
tank/coldstore
tank/media
tank/pictures
tank/storage
tank/texts
Also, each of the users has a separate dataset for backups:
tank/h_user1
tank/h_user2
tank/h_user3
tank/h_user4
Finally, there is a file system for the Time Machine backups:
tank/TM_mediator
Email notifications¶
This assumes we have basic mail notifications working with postfix.
sudo vi /etc/zfs/zed.d/zed.rc
so that we have (note these are commented out by default):
ZED_EMAIL_ADDR="<USER1'S MAIL ADDRESS>"
ZED_EMAIL_PROG="mail"
ZED_EMAIL_OPTS="-s '@SUBJECT@' @ADDRESS@"
ZED_NOTIFY_VERBOSE=1
ZED_NOTIFY_DATA=1
Follow this with
sudo systemctl restart zed
Test with scrub of tank, should send mail.
sudo zpool scrub tank
We will setup snapshots in a later step.