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Questions tagged [zpool]

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Errors on a zpool filesystem

I'm using ZFS on a Debian 9 machine. This machine has been working for years without any problem until today. The zfs pool is mounted on top of a RAID system, controlled by hardware (so only one drive ...
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0 votes
1 answer
65 views

ZFS / Zpool with limited disk usage?

I have a server with a JBOD of 36 x 14TB disks that have a total usage capacity of 12.7TB (Disks are WUH721414AL5201) I have created two zpool's: zpool1 which contains 3 vdev's (Each of them having ...
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  • 103
2 votes
2 answers
228 views

ZFS pool corrupted

I am running proxmox (7.1-10) and a number of VMs. I accidentally forced to import from proxmox a ZFS pool that was being used by a VM (truenas 12.0-U7) with: zpool import -f Pool-1 The command ...
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  • 31
0 votes
0 answers
20 views

zpool import missing cache drive; ubuntu

I apologise if my information here is badly laid out. I added a cache drive to my zpool by udev id (e.g. sda). Later, I restarted the computer and it was assigned a different udev id (of course). To ...
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2 votes
1 answer
101 views

How to fix ZFS pool once spare replacement done or how to correct spare replacement

I have a ZFS pool in the current state: [root@SERVER-abc ~]# zpool status -v DATAPOOL pool: DATAPOOL state: DEGRADED status: One or more devices has experienced an error resulting in data ...
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2 votes
1 answer
321 views

ZFS Pool Data Backup and Restore

I currently have a zfs raidz2 pool stuck in a resilvering loop as I was trying to replace the 3TB disks with 8TB disks. After letting the first replacement disk resilver online for over a week it ...
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0 votes
1 answer
1k views

Testing zpool IO performance

To test the write speed of a 2.5 inch SATA3 spinning hard drive (some old Seagate one) installed in my TrueNAS system I used dd if=/dev/zero of=/mnt/pool/test.dd bs=1024 count=1m (found this in ...
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4 votes
1 answer
395 views

ZFS: device vdev wandered faulting zpool

I have a zpool thats now showing in a FAULTED state after a power outage rebooted the server & devices names got thrown around. I understand I messed up by adding vdevs by device name, but didnt ...
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0 votes
1 answer
188 views

ZFS: i/o error - all block copies unavailable on reboot

I am trying to create RAID-Z pool on 3 disks, but I'm getting this error after reboot: zpool create -f -o altroot=/mnt datapool raidz vtbd0p3 /dev/da0 /dev/da1 Error is ZFS: i/o error - all block ...
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0 votes
1 answer
59 views

Creative solution for a crippled zpool (aka help a dying raid to survive for 1-2 weeks)

I have a ZFS RAIDZ-7 made by 8x4TB on a Proxmox 6 (linux kernel version: 5.4.78-2-pve, openZFS version: 0.8.5-pve1). An unfortunate astral conjunction force me to remove 3 disk from my RAIDZ. In ...
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0 votes
1 answer
87 views

Cannot see the right and used space on a ZFS dataset

I have set up a vm with debian buster and ZFS. Initially the machine booted from first hard drive, but added x4 20Gb hd and transfered the system to zfs for testing purposes. It works, so I added some ...
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  • 143
2 votes
2 answers
3k views

Unable to zpool drive: is in use and contains a unknown filesystem

Created raidz1 drive array on CentOS8. Five drives and after reboot zpool would not load. Did a zpool import -a, to import the zpool and datasets. I had a missing drive, which bugs me to no avail, I'...
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  • 31
2 votes
1 answer
662 views

Why is the available space not increased when i increase the quota of the ZFS share?

I'm not very familiar with ZFS and need to increase the size of an ZFS share on our FreeNAS. When i do zpool list i see that we have 2 ZFS pools: NAME SIZE ALLOC FREE EXPANDSZ FRAG ...
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  • 255
3 votes
1 answer
984 views

zfs remove wrongly added device

I accidentally added a device as normal pool device instead of cache device. Is there a way undo this? (I basically forgot to type cache when adding the device) I can't remove it root@dmi-vault2:~# ...
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  • 31
3 votes
1 answer
140 views

Expand existing RAID1 zpool into RAID10 zpool

I'd like to expand/convert my existing RAID1 (2x 3TB mirror) zpool to RAID10 zpool by adding 2 more 3TB HDDs without losing (or moving) data stored on my existing pool. The final result will look ...
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2 votes
1 answer
1k views

Recover from "FAULTED" zfs pool. "-F" option seems to be ignored

On Ubuntu, I recently started trying out ZFS on an external USB hard drive. I now seem to have a corrupted zfs pool, which probably happened simply as a result of me shutting down my computer (with ...
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5 votes
0 answers
616 views

Recovering/importing ZFS Linux pool with duplicate pool name

I did something very stupid today in attempting to add a third mirror to an existing Linux zpool named backup. Suffice it to say that I made a couple errors because I don't really do much admin with ...
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4 votes
1 answer
352 views

When does "zpool scrub" delete files automatically?

Background is a general discussion about ZFS and the claim that in case of permanent errors to files, it automatically deletes files unless a correct copy is available. That sounded pretty wrong to me ...
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1 vote
1 answer
2k views

zpool stuck in resilvering loop

I have the following zpool: NAME STATE READ WRITE CKSUM zfspool ONLINE 0 0 0 mirror-0 ONLINE 0 0 ...
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3 votes
1 answer
332 views

zpool status shows drives are defaulted, but they seem okay. Can I add them back?

zpool status is reporting defaulted drives. But they actually appear to be okay. Is it possible to add them back? $ dev/disk# zpool status -v pool: darkpool state: DEGRADED status: One or more ...
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1 vote
1 answer
2k views

Why are my ZFS pools "unavailable"?

I just replaced a hard-drive, that was part of two different redundant pools, and now both pools are unavailable... Details: There are four drives: 2x4TB (da0 and ada1) and 2x3TB (da1 and da2). One ...
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1 vote
0 answers
24 views

How to Boot to Mirrored ZFS Drive

I would like to clone an existing operating system environment. I currently have a Solaris 10 running ZFS mirrored drives on a Sun Fire x4100 box. Can I take one of the mirrored drives, remove from ...
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4 votes
1 answer
1k views

Send email when zpool drive dies?

I couldn't access my media drive the other day. SSH'd into my media server to see what was up. ZFS pool wasn't even mounted. When I got it running again, I saw that it was degraded and one of the ...
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2 votes
1 answer
151 views

zpool replace ran successfully, but still recommends zpool replace. What is it telling me?

A drive failed in a raidz3 (pci-0000:03:00.0-scsi-0:0:10:0), and I replaced it with an available spare (wwn-0x5000c500858252ef): pool: darkpool state: DEGRADED status: One or more devices are ...
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1 vote
0 answers
1k views

ZFS Replace Cannot Label new Disk

I am running Ubuntu 18.04.3 and zfs 0.7.5-1ubuntu16.6. I had a disk go bad and I am in the middle of replacing it. In the past, this has worked just fine by making sure the bad disk is offline, then ...
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3 votes
1 answer
4k views

ZFS pool degraded with faulted disk, export and replace not working

I run into troubles after trying to add more disks to my Ubuntu server device. While being a total beginner I powered the server off, added two more disks and restarted the system only to find one of ...
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2 votes
1 answer
2k views

Replaced a dead disk in a ZFS pool. After resilvering finished, the status look weird :/

I replaced a dead disk in a ZFS pool (on FreeNAS-11.1-U6.3) following the hints I found at Need to replace disk in zpool ... confused ... # zpool replace raid2 gptid/f00-whatever-id-that-was-...
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  • 21
1 vote
1 answer
2k views

How to correctly attach a disk to a zpool to create a mirror? - zpool attach says no such pool or dataset

Yesterday one of my pools which is a mirror was degraded - one of two 2TB disks failed. I replaced the failed one with another disk 4TB (ada3). Now I want to add another 4TB disk (ada1) to enlarge the ...
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5 votes
1 answer
1k views

ZFS pool degraded on reboot

I have a Ubuntu server set up with a 14-disk ZFS raidz2 pool. About 80% of the time, on reboot, I will end up with a degraded pool with two of the disks marked as faulted. The drives that are ...
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2 votes
2 answers
627 views

ZFS replace disks in freebsd, how and when

I have the following zpool configuration: zpool status NAME STATE READ WRITE CKSUM data ONLINE 0 0 0 raidz2-0 ONLINE 0 0 0 da1 ...
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3 votes
1 answer
1k views

Faulted zpool recovery - can I dd some disks to new disks to allow me to scavenge donors?

I am in the process of trying to recover a pool that had been degraded and neglected, then had a second mirror member fail, resulting in a faulted pool. For whatever reason, the spare never ...
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3 votes
1 answer
1k views

cannot import a zpool volume : I/O error

this is on nexenta open storage. I have a zpool that is in UNAVAIL state because of some disks. # zpool import -F pool: delta id: XYAZA state: UNAVAIL status: One or more devices are ...
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2 votes
1 answer
975 views

ZFS (Freenas) off-lining an apparently healthy drive during scrub

I have a 4 disc RAIDZ config running on Freenas 9.1. Earlier I noticed that one of the drives had been taken offline. I ran smartctl, and all the discs passed SMART. A few days ago the machine had ...
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2 votes
1 answer
254 views

How to delete the pool with state = Faulted?

I have a pool named test_pool and i can only see it when "zfs import" is run. How can i delete this pool and detach associated device from it ? # zpool import pool: test_pool id: ...
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1 vote
1 answer
3k views

Can I remove a disk from a zpool raidz2?

Unfortunately I do not really understand zfs. I have a Proxmox 5 node with 5 300GB disk in raidz2. History: zpool create -f -o cachefile=none -o ashift=12 rpool raidz2 /dev/sda2 /dev/sdb2 /dev/sdc2 /...
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0 votes
1 answer
228 views

ZFS - 2 Striped mirror set to 1 mirror set, how?

Currently I'm running a ZFS striped mirror set: NAME STATE READ WRITE CKSUM data ONLINE 0 0 0 ...
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1 vote
1 answer
176 views

Hard drive in zpool showed error, but later seemed ok. How do I tell if something is wrong?

My work computer has a 4 hard drives setup in a zpool on an Ubuntu system. I'm trained as a programmer, not IT, but I'm partially responsible for managing my computer. After rebooting the other day, I ...
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  • 113
0 votes
2 answers
2k views

Increase rpool size on Solaris 11.3 ESXi Virtual Machine

I'm trying to run updates on my Solaris 11.3 server but I am unable to because there isn't enough space on my rpool. I've tried deleting log files and other useless stuff but it's not enough. ...
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2 votes
1 answer
731 views

mdadm reclaimed my zfs storage pool

I recently converted a mirrored mdadm partition on Ubuntu 16.04 to a zfs mirrored pool, or so I thought. After a few days of using the zfs pool, I rebooted the system and the zfs pool disappeared. "...
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  • 221
1 vote
1 answer
1k views

Where'd my zpool data go?

N.B. I'm a complete noob when it comes to ZFS pools. I created a ZFS pool yesterday across 4 3TB HDDs, like so: 2017-06-10.16:31:08 zpool create data sda sdc sdd sde 2017-06-10.16:31:29 zfs set ...
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  • 303
-2 votes
2 answers
390 views

zfs backup script cannot receive destination zpool is renamed

Hello I have an issue with a backup script for ZFS snapshots: basically the break down of the script is this: ### START OF SCRIPT # These variables are named first because they are nested in other ...
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5 votes
1 answer
5k views

How to add more physical disks to a mirror vdev (to increase redundancy)?

Can more physical drives be added to mirror vdevs after a zpool has been created? For example, if a zpool is created using: zpool create test_pool mirror /dev/sd0 /dev/sd1 mirror /dev/sd2 /dev/sd3 ...
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  • 1,497
2 votes
1 answer
416 views

ZFS disk in two pools after reboot?

I'm pretty new to ZFS, so perhaps I'm reading this wrong. After rebooting my server I had to reimport my pool, and upon doing some was presented with this state: # zpool status -v pool: data ...
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-1 votes
1 answer
135 views

How to export zpool from alternate disk slice?

I need some help in recovering ZFS pool. Here is scenerio. There are two disks - c0t0d0 - This is good disk. I cloned it from other server and boot server from this disk. c0t1d0 - This is original ...
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1 vote
1 answer
796 views

Unable to Import Zpool

We are facing an failure of one of our Solaris/ZFS file server. The h/w won't boot, we are not that worried about the server but the data is precious. We took out a set of 8 drives in raidz2 pool and ...
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3 votes
1 answer
791 views

Importing an exported pool on Solaris 11 fails

Unable to import an exported pool. Based on the info below, am I able to somehow import the pool? Or, is there a way to retrieve the data from the drive itself? There is no corruption on either ...
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2 votes
1 answer
2k views

zfs change block size without going offline

Given a raidz1 vdev on FreeBSD 10 with this config: root@gw:~ # zpool status pool: data state: ONLINE status: One or more devices are configured to use a non-native block size. Expect ...
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8 votes
1 answer
2k views

ZFS vdevs accumulate checksum errors, but individual disks do not

I'm running a vendor-specific derivative of FreeNAS 9.3. My trouble started when I installed a new JBOD chassis to add two new vdevs into my pool, and the chassis had a bad board. During this time, I ...
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0 votes
3 answers
212 views

Is there a zpool configuration other than raidz2 which lets me survive ANY 2 out of 4 failures?

I am going to purchase a HP Microserver gen8 system for a home fileserver and it contains 4 drive bays. I will use those four drive bays to create a single zpool for mass storage. My goal is the ...
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3 votes
0 answers
1k views

ZFS slow read speed on 8 drive 4 vdev striped mirrors

I have 8 3TB WD Red SATA drives sdb through sdi i use in my pool. My boot and OS drive is a an 850 EVO SSD on sda. The 8 WD drives are on a Supermicro AOC-SAS2LP-MV8 Add-on Card, 8-Channel SAS/SATA ...
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