Questions tagged [zfs]
An advanced file system that can span multiple disks, heal itself from data corruption, deduplicate data, encrypt, etc.
334
questions
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1answer
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ZFS zpool cannot be imported, cause panic if not imported as readonly
After a reboot, ZFS pool never stopped trying to import the pool. It was blocking the boot-sequence and I had to rename the /etc/zfs/zpool.cache to another name, in order to boot the system.
There was ...
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0answers
26 views
ZFS reporting different disk usage, which one is correct?
I am trying to figure out how much space on disk is used by ZFS, with deduplicaiton eabled.
I have only enabled deduplication, not changed chunk size or anything else.
But depending on the command I ...
0
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1answer
127 views
Mounting zfs network shares in Ubuntu LTS 20.04 using cifs- mount error(2): No such file or directory
I have 3 Thecus NAS servers: a N5500 (Firmware: 5.03.02), a N5200XXX (Firmware: 5.03.02), and a N5550, (firmware 2.06.02.5.cdv) each configured as RAID 5. The N5500 and the N5200XXX are using zfs and ...
0
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1answer
80 views
ZFS broken on Centos 7.8
I am using ZFSonLinux under CentOS 7, and after a restart, the kernel updated to 7.8. the ZFS modules were not loaded and modprobe zfs said the modules were not found. dkms status was empty and having ...
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3answers
38 views
ZFS to boot ubuntu in 20.04 for SoHo server. Is this a good idea?
It seems ZFS is much more robust than ext4, specially for handling power failures or bad-blocks/media-corruption.
There's old literature from 2013, 2014... here and there about ZFS as a boot ...
0
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0answers
11 views
ZFS Unmount Entire Pool
I'm getting issues when mounting my zpool. Some zfs aren't mounting because "directory exists", aka the subfolders that the subdataset is stored in. Such as tank/media/movies. It says that that /...
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1answer
23 views
Is it good idea to horizontally partition groups of disks into different ZFS vdevs?
--------------------------- +-------+ --------
| |
| part | vdev 1
| | no redundancy
-----------...
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0answers
23 views
Unable to Limit ZFS ARC Size (At Runtime, Without Rebooting)
I am trying to temporarily limit the memory usage of ZFS at runtime, specifically by limiting the maximum ARC size.
Before attempting to do this, we first check the current settings and sizes:
# cat ...
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0answers
48 views
Seemingly random system generated zfs datasets with Ubuntu
I've installed Ubuntu 19.10 on zfs, with both root and boot datasets, root encrypted. Since this install I am also getting system created datasets with seemingly random string names, legacy type. ...
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0answers
14 views
What will happen to the partitioned disks in my ZFS pool as it fills up?
I'm using 3 hard drives, formatted with a mix of ext4 and NTFS, in a RAID-Z ZFS pool. I thought I would have to format these drives to use them with ZFS, but after following the HowToGeek guide on ...
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0answers
20 views
ZFS Setup with four drives, with different mount points?
(This question is similar to this one: ZFS Beginner Setup with Different Size Drives , but there are enough differences that I thought it might be a better separate question)
I had already sent this ...
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0answers
35 views
zfs offline disk during resilvering possible?
I have a 24-disk FreeNAS 9.10.2 installation in which I just replaced a disk in a mirror vdev (1 of 12 mirror vdevs) with a larger drive (3 -> 10TB).
After 5 minutes into the resilvering process, I ...
0
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0answers
33 views
Not sure if ZFS issue / ATA Linux controller issue?
I've been using ZFS for a few years now, but since moving to a new NAS I've been having a weird issue that I'm not even sure is ZFS-related.
I run a RAID-Z with 4 4TB disks, and every week or so (...
1
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1answer
151 views
Grow ZFS RAID-Z[123] without degradation?
I know that on ZFS, the only way to grow a RAID-Z (or RAID-Z2 or RAID-Z3) vdev is to replace the disks with larger ones; there is no way to change the geometry. However, is it possible to do so ...
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0answers
204 views
Slow SMB Performance over 10GBE(Write)
Does anyone have any experience configuring 10gbe file server with ZFS and SMB?
I have a system up and running but can't for the life of me figure out why the write speeds are so slow.
storage@...
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0answers
81 views
how to change from zfs to ext4
i accidentally create zfs pool to sda1 with
sudo zpool create -f lxd-zfs-pool /dev/sda1
zpool status output is
pool: lxd-zfs-pool
state: ONLINE
scan: none requested
config:
NAME STATE ...
2
votes
1answer
194 views
how to trim SSD cache drive in zfs 0.8
I have upgraded zfs to kmod-0.8.2-1 for SSD trim and trim function works well for normal zfs SSD drive but does not work for SSD cache drive(sdc in the below log). How can I trim it? Thanks in ...
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0answers
16 views
Transferring LXD after moving to a new zpool
I have just started the process of replacing a raidz zpool with a mirror zpool. I created the new pool and then did zpool send | zpool receive to copy the data across. That all went smoothly, but I ...
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0answers
53 views
Retain xattrs in files (macOS files on Linux SMB server)
I run an SMB4 server on Ubuntu Server 19.04 using ZFS as the server file system (separate from the boot drive). I use this server to store files from my Macs (10.7, 10.8, 10.11, 10.12, 10.13, 10.14). ...
1
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1answer
81 views
Drawbacks of small ZFS pools versus large
We are redesigning out current ZFS file server. It currently only has one pool of over 70TB.
I see this is a problem since, if there are enough disk failures within the pool to make it non-...
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0answers
121 views
“stripe: Not enough disks selected. (0<1minimum)” error ZFS Configuration FreeBSD
As part of an assignment I am trying to create a FreeBSD 12.0 virtual machine (I use VirtualBox). I'm having trouble with the Root-on-ZFS configuration - it gives me an error "not enough disks ...
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0answers
25 views
What is cksum in solaris 11 and what is the use of it?
What is the use of cksum in solaris and what is the need of it.
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0answers
77 views
Any concerns about striping different sized SSDs using ZFS in Freenas?
I have a few decent, but differently-sized SSDs lying around that I would like to use in a stripe in Freenas. The sizes are: 2 x 240GB, 1 x 256GB, 1 x 1TB.
Using a stripe, this gets me to ~1.73TB. ...
0
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1answer
487 views
How does the Percent_Lifetime_Remaing SMART attribute get calculated on a Crucial MX500 disk?
I have a home lab grade server that I put 4x Crucial MX500 disks into a couple months ago. One of the disks (they're all similar) has the following SMART details:
smartctl 6.5 2016-05-07 r4318 [...
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0answers
48 views
ZFS 0.7 version in Centos 7.6
i am trying to install zfs in my centos 7.6 with kernel 3.10.0-957.el7.x86_64 using this guide:
https://github.com/zfsonlinux/zfs/wiki/RHEL-and-CentOS
and doing a
yum install http://download....
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0answers
40 views
can I switch backup methods from rsync to zfs send/receive without copying all the data?
I've been using rsync to backup a ZFS filesystem to an offsite server.
I now want to switch to using zfs send/receive. Can I do this without first doing a full copy of the dataset?
In other words, ...
0
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1answer
24 views
How to bring a working drive back online?
I am using Proxmox with ZFS. In an attempt to regularize the drive names, I offlined and detached a working drive in my vdev mirror-0, however I cannot bring the said drive back up
root@r740xd:~# ...
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0answers
72 views
Linux rm takes minutes on 100kB file
I'm encountering extremely slow deletion of files on a Linux machine with ZFS filesystem:
$ ls -l
-rwxr-xr-x 1 root nfsnobody 297056 Jul 17 2018 somefile
$ time rm -f somefile
real 1m30.117s
user ...
0
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1answer
69 views
Is having raid0 zfs pool with copies=2 datasets equals to having raid1 zfs pool?
I have a computer with 2 hdds, which I want to use for data storage.
Initially I wanted to create mirrored zfs pool, but not so much data needs to be stored so safely.
So, if I create zfs pool with ...
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0answers
29 views
Can a ZFS pool be imported only when all drives are present?
I use ZFS as my private backup solution with a mirrored pool (e.g. the data exists equally on 4 different drives). Sometimes my laptop doesn't recognize one of the USB drives (I just have to plug them ...
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2answers
102 views
Is there a redundant storage method that handles drives of multiple sizes well? What about growth?
I'm looking for something redundant I can just plop on a server with a bunch of garbage drives that just works without the smaller drives crippling the capacity of the larger drives.
Lets say I have ...
2
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1answer
67 views
Rename zfs disk path
FreeBSD zfs 2 disk mirror
I replaced a dead hdd and somehow it renamed ada0 to ada1
zpool status
mirror-0 DEGRADED 0 0 0
ada1p3 ONLINE 0 ...
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0answers
17 views
ZFS: Does a resilver also do what a scrub does?
If I'm not mistaken a resilver checks all data on a faulty disk and restores it. Is that correct?
Does it as a sideeffect also check all data on other disks (like what a scrub does) or does it only ...
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0answers
60 views
Using ZFS to merge multiple drives to the same mount point
I'll start by saying I'm currently having a server with 4x6TB drives running on Ubuntu 18.04. I'm merging them together using mergerfs, but I suspect it is causing my server to crash very often (about ...
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0answers
111 views
After OS upgrade, ZFS disk in pool is unavailable
UPDATE 2019-06-16
I've tried sudo zpool replace tank /dev/disk/by-id/ata-ST8000AS0002-1NA17Z_Z840GFH2 and get
invalid vdev specification
use '-f' to override the following errors:
/dev/disk/by-id/...
2
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1answer
156 views
Can a zfs mirror contain combined disks?
Can I create a single zfs mirror by combining disks?
mypool
mirror1
disk1 (2TB)
disk2 (2TB)
combined
disk3 (1TB)
disk4 (1TB)
In other words disk3 ...
1
vote
1answer
435 views
ZFS Add a Hdd to raidz-2
I have a zfs raidz-2 (raid-6) with 7 4TB hard drives. When I added another hard disk with zpool add, it was not included in the original raid (zpool status). Can this still be fixed? Or do I have to ...
2
votes
1answer
103 views
Setting system-wide quota on ZFS
It is commonly recommended that one shouldn't fill a ZFS volume beyond 70-80% to prevent fragmentation. I, however, find that I have gone beyond that in the past (the "I need just a bit more, I'll ...
6
votes
1answer
428 views
ZFS - HDD performance strongly varies in 3-way-mirror among vendors
Prerequisite
We have a FreeNAS System with a Pool consiting of 5x"3-way-mirror". The disks per mirror are from different vendors but with the same "on-paper" performace-characteristics.
Pool-Layout:...
3
votes
2answers
2k views
Do I really need a ZIL SLOG?
I'm building a NAS for home/personal use that will use ZFS (probably running FreeNAS) over a SATA SSD array. In terms of usage, I expect the system to be "idle" (not counting ZFS background stuff e.g. ...
0
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2answers
401 views
How to avoid data loss due to disk bad sectors?
As the title says, I am concerning about, how can we avoid data loss due to harddisk (either mechanical HDD or SSD) bad sectors.
\ More information \
Question is well defined. Question ends here. ...
2
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1answer
614 views
Encrypted ZFS dataset fails to mount: Permission denied
I'm on NixOS and try to encrypt a hard drive partition (potentially more in the future) using ZFS. I tried to stick to this guide, so I added
boot.zfs = {
enableUnstable = true;
...
0
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0answers
126 views
Preserve Permissions when adding files to a Samba share
I have a Mac (El Capitan 10.11.6) client that is connected to an Ubuntu server (18.04 LTS) running Samba, sharing a ZFS pool. Everything works great, except that whenever I add a file to the server, ...
2
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0answers
42 views
Solaris 11.3 can't import a pool
I had some reboots last days and guess it's something to do with the SAS controller. But maybe I'm wrong.
Any idea why the zpool import and zdb -e [pool] aborted or crashed with core dumps?
...
2
votes
1answer
140 views
What kind of metadata is primarily being loaded/evicted from ARC, in my ZFS system?
I'm trying to check how my ZFS pool's ARC is used, motivated by "do I need more RAM, even though expensive".
I have 128GB fast ECC and using NVMe SSDs for L2ARC, but it's still doing a lot of small ...
3
votes
0answers
24 views
Storage setup for home servers [closed]
I'm looking to set up my first home server, for multiple purposes, with Proxmox.
I already got the hint it's best to use 2 SSDs (of not too big size) for the actual Proxmox installation.
As far as I ...
-1
votes
1answer
93 views
Data missing in a degraded zfs pool
This is my first attempt to create a zfs pool manually under Proxmox.
I have created a raidz2 zfs pool with 5 drives (4 WD RED 1TB NAS drives and 1 old 1TB Seagate). I also forgot to specify 2 spares,...
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0answers
225 views
A clear explanation of metaslab groups and gangs, in ZFS?
I'm trying to troubleshoot a problem related to metaslab and spacemaps in ZFS on FreeBSD, for which I'd like to have a clear understanding of how these work. Most of the docs make sense. But I keep ...
1
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1answer
660 views
Can ZFS sync=disabled cause corruption of previously written data?
If sync=disabled is set, I understand that the ZIL isn't written to disk and, instead, changes are written directly to disk. Aside from possibly inconsistent data from an application-standpoint due, ...
1
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0answers
82 views
ZFS drive is unavail after adding new drives to the computer
I have a server that I just recently redid, new drives, fresh OS (Ubuntu Server 18.04)
I set up a new pool with the two new drives (4 tb each) with: zpool create poolname mirror /dev/sda /dev/sdb
It ...
