ZFS requested features not enabled
I am running a TrueNAS (formerly FreeNAS) based server for about six years now. It is currently running TrueNAS 13.0-U6.1. There is a "boot pool" and a "data pool", both installed with the NAS in 2017...
View Articledf reports zfs used space as 128K, not the actual used space
I have a ZFS mirror pool in my Proxmox instance. I am trying to get it to mount to an LXC container read-only (preferably not giving full filesystem access) so I can have Homepage detect the used and...
View ArticleClik here to view.
dRAID, Parity 1 + 1 Distributed Spare Better than basic RAIDz2 for 5x12TB HDDs?
Stumbled on dRAID recently and was grokking the docs for OpenZFS on linux and I came away with a conclusion from the chart that I wanted to double check.This is a brand new system that I'm currently...
View ArticleZFS Rollback not including all files
I messed up and accidentally deleted a everything in a dataset of many subdirectories. Luckily I have daily snapshots and nothing had changed so I did a rollback to the most recent snapshot. After the...
View ArticleZFS performance: Extreme low write speed
I am running a small home server. The specs are:CPU: AMD Ryzen 5 2600RAM: 32 GB ECCSystem drive: 128GB NVMe SSDData drives: 3x 4 TB Seagate Barracuda HDDThe server runs some applications like Nextcloud...
View Articlezfs: scrub vs resilver (are they equivalent?)
Is a resilver as good as a scrub? If not, why?Use case: during a scrub checksum errors come up. Instead of continuing with the scrub, stop it, replace drive and resilver. Did the resilver do some/all...
View Articlechange disk cache settings on Samsung PM9A3 via nvme-cli
I will be running Proxmox guests on a ZFS volume consisting of Samsungs PM9A3 NVME drives. I read here for ex. it might be an advantage in performance to keep the cache of those drives active.So I just...
View ArticleBacking up a MySQL/MariaDB database via ZFS snapshots without errors
So I am using zrepl to take snapshots of my production machine and replicate them to a backup server. This also includes MariaDB, it's in it's own dataset with recordsize=16kI've been testing the...
View ArticleZFS inside a virtual machine
Should I use ZFS inside a virtual machine? According to existing information (in particular this thread, which I will quote below) it is not a good idea, unless certain measures are provided (such as...
View ArticleFreeBSD ZFS raidz1 Started a (da59) drive replacement. During resilver,...
Our system started slowing down... Found a couple of drives in the same raid that looked scary.Replaced the drive that S.M.A.R.T. marked as failure eminent. (da59)Then da60 started to error.Finally the...
View ArticleUpgrade OS on ZFS file server
I need to upgrade the OS of my ZFS disk server from CentOS 7 to Rocky Linux 9. I am currently running ZFS 2.0.7, and if I'm correct Rocky Linux 9 uses 2.3. My tentative plan is to use the AlmaLinux...
View ArticleClik here to view.
Samba Windows ACL not working
I want to configure Samba to manage Windows ACL and manage them from Windows via the security tab.The Samba server is standalone and not part of an AD tree; i already followed various offical and...
View ArticleZpool Import, one or more devices is currently unavailable
I know this is a pretty common question, but I haven't found a situation quite like mine.To cut it short, I had a ZFS pool on my home server on bare metal of proxmox, wanted to move it to an open media...
View Articlezfs errors on hetzner cloud ubuntu 22.04
I have an ubuntu 22.04 system on hetzner cloud arm machines that keeps experiencing zfs errors, and I am a bit stumped as to what is the problem.zpool status -v pool: encpool state: ONLINEstatus: One...
View ArticleZFS silently overwrites the later mirrored devs, without any logs?
Given two mirrored drives:/dev/loop1 of zfs1.img/dev/loop2 of zfs2.imgIf the drives contain different data, even if the copies in zfs2.img are newer, or zfs2.img contains extra files, ZFS always...
View ArticleAccess to ZFS pool when one drive has failed is incredibly slow
I have a ZFS box that I inherited that is having a lot of issues. Checking the status I see there are a few drives with issues:ganymede $ zpool status -x pool: dpool state: DEGRADEDstatus: One or more...
View Articlezfs not using full disk I/O
I have setup zfs on a fresh Ubuntu 20.04. But speed seems awfully slow.The disks can deliver 140 MB/s if run in parallel:$ parallel -j0 dd if={} of=/dev/null bs=1M count=1000 :::...
View ArticleXFS / ZFS - Unable to mount filesystem - I/O Error
We have a server with Ubuntu 20.04.6 LTS. It is the secondary storage for our backup, with 12x8TB HDDs in a RAIDZ3, with an XFS filesystem on top.A couple of days ago, one drive failed. I thought, "OK,...
View ArticleIncrease the ZFS partition to use the entire disk
I have a ZFS pool that currently occupies 100Gb. I increased the disk size to 150Gb, but I can't seem to get the ZFS use the entire disk. I have a the same exact issue yesterday with another server,...
View ArticleMongoDB and ZFS bad performance: disk always busy with reads while doing only...
I have huge performance issues using MongoDB (i believe it is mmapped DB) with ZFSonlinux.Our Mongodb is almost only writes. On replicas without ZFS, disk is completely busy for ~5s spikes, when app...
View Article