ZFS is a modern filesystem originally developed by Sun Microsystems and licensed under the CDDL. An open-source fork of ZFS can be found at http://open-zfs.org/ , which is supported by ZFSonlinux.org, illumos.org and ZFS developers in the FreeBSD & MacOSX communities.

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2
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2answers
54 views

zpool status reports error … what next?

On our FreeNAS server, zpool status gives me: pool: raid2 state: ONLINE status: One or more devices has experienced an unrecoverable error. An attempt was made to correct the error. ...
1
vote
0answers
39 views

Does ZFS really stripe across every vdev, even in very large zpools?

I have read that ZFS stripes the data in a zpool across all top-level vdevs, assuming all vdevs are added at the beginning of the pool's life. Everything I have read seems to regard this as a good ...
6
votes
2answers
134 views

ZFS RAID and LUKS encryption in Linux

I'm planning to setup a set of 3x 2TB 7200rpm drives as a LUKS-encrypted Z-RAID pool in Linux (for a NAS solution). My understanding of the problem at hand is that the only way to achieve this is to ...
3
votes
4answers
453 views

Does ZFS cache Compressed or Uncompressed data in a ZFS file-system with compression turned on?

ZFS supports file-system compression and it also caches frequently or recently accessed data. If a system has lots of CPU but the underlying data storage system is slow. It is possible that ZFS would ...
0
votes
2answers
43 views

Scale-out distributed storage with snapshots

I'm aware there are many similar questions around, several with great answers. I still haven't quite found what I'm looking for though: a distributed, scale-out FS that supports snapshots. Gluster ...
2
votes
3answers
163 views

MongoDB and ZFS bad performance: disk always busy with reads while doing only writes

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 ...
-1
votes
2answers
80 views

ZFS didn't expand free space after add [closed]

I recently expanded my storage pool "zstorage" by adding two more drives. It had 3 3TB drives in RAID-Z, and I added two more 1.5TB drives also in RAID-Z (which I understand is effectively the same as ...
5
votes
2answers
156 views

Need to replace disk in zpool … confused

I need to replace a bad disk in a zpool on FreeNAS. zpool status shows pool: raid-5x3 state: ONLINE scrub: scrub completed after 15h52m with 0 errors on Sun Mar 30 13:52:46 2014 config: ...
1
vote
1answer
85 views

FreeNAS: “swap_pager: I/O error - pagein failed”

Our FreeNAS server log is constantly filling up with Apr 5 15:13:49 Wheelhouse NAS kernel: swap_pager: I/O error - pagein failed; blkno 524312,size 4096, error 6 Apr 5 15:13:49 Wheelhouse NAS ...
0
votes
2answers
53 views

FreeNAS: “/var: write failed, filesystem is full”

Upon logging into our FreeNAS via shell, it says /var: write failed, filesystem is full So I did > df -h Filesystem Size Used Avail Capacity Mounted on /dev/ufs/FreeNASs2a ...
1
vote
2answers
84 views

Need to identify disk in zpool … how?

I need to replace a bad disk in a zpool on FreeNAS. zpool status shows gptid/5fe33556-3ff2-11e2-9437-f46d049aaeca UNAVAIL 0 0 0 cannot open How do I find the serial # of that disk? ...
0
votes
0answers
36 views

Any disadvantage of running a virtual machine using files for its drives hosted on freenas/zfs?

I recently got tired of the really slow I/O reads and latency (10-30 MB/s read, not sure for latency but very slow) from a provider I rent a virtual machine from. He uses freenas, the virtual machine ...
3
votes
4answers
2k views

XenServer and ZFS via NFS

I'm trying to connect a NFS share to XenCenter. The NFS server is a ZFSGuru distro (uses FreeBSD). The zfs volume was exported like this: /sbin/zfs set sharenfs="on" temppool/share According to ...
3
votes
2answers
160 views

How can I monitor HP P410 hardware RAID degraded in Freenas

I would like to run freenas on a HP P410 hardware RAID 5 4x600GB 15k SAS array and be alerted in the case of physical disk failure, however the freenas documentation says: to prevent problems, do ...
4
votes
2answers
63 views

zfs - two pools with nested mountpoints and conflicting mount order

I have a problem with automounting separate pools, that have nested mountpoints. I am using ZfsOnLinux 0.6.2. The siuation currently is as follows: zpool1 ---> /var zpool1/log ---> ...
0
votes
0answers
44 views

ZFS import unable to find any pools

I had a ZFS pool -- a mirror containing 2 vdevs -- running on a FreeBSD server. I now have only one of the disks from the mirror, and I am trying to recover files from it. The ZFS data sits in a GPT ...
2
votes
1answer
52 views

FREENAS: Why isn't mv command instant within a RAIDZ1 volume?

I'm currently 'reorganizing' file structure within a RAIDZ1 volume. Moving directories from one dataset to another, which are both contained on the same volume. SSH'ed into the machine and did a ...
1
vote
2answers
47 views

How to use a file as a zpool?

If I do dd if=/dev/zero of=/tank/test/zpool bs=1M count=100 how can I treat the file /tank/test/zpool as a vdev, so I can use it as a zpool? It is for zfs testing purposes only.
2
votes
2answers
706 views

strange ZFS disk space usage report for a ZVOL

We have a 100G ZVOL on a FreeBSD 10.0-CURRENT host which claims to use 176G of disk space: root@storage01:~ # zfs get all zroot/DATA/vtest NAME PROPERTY VALUE ...
4
votes
1answer
95 views

Gluster + ZFS, deadlock during benchmarking: zfs_iput_taskq 100% cpu

First some background: I work at a company that runs a PHP-webapplication. We have a storage backend mounted over NFS on several webservers. Today we have the issue if one webserver writes a file over ...
3
votes
1answer
111 views

NexentaStor: how to partition SSD disk?

I try to setup some handmade storage made of desktop motherboard, 4 x SATA drives and 2 x SSD drives. I'd really like to use NexentaStor for its nice web interface and for it is some production-ready ...
0
votes
1answer
87 views

freenas zfs read performance sucks .. why?

I just set up a freenas zfs raid-z2 with 4 drives sata enterprise drives and doing some performance tests. Right now I'm pushing and pulling linux images into the storage. My notebook has a samsung ...
1
vote
1answer
41 views

Is it possible to remove a drive from zfs?

I have a zfs raid-z1 with too much storage volume. I thought of taking out one volume. Is it possible to remove a drive from a zfs raid storage? thx for your help
1
vote
1answer
57 views

Is it possible to change zfs raid-z1 to raid-z2 or raid-z3 on freenas?

I have a running freenas zfs on raid-z1. For safety i though of increasing parity. Enough spare space is available. Is it possible to upgrade a zfs raid-z1 to raid-z2 or raid-z3? thx for your help
2
votes
2answers
91 views

Why does zfs fail to cache this workload when “normal” filesystems cache it completely?

Update: because recordsize defaults to 128k, the amount of data read by the test program is much larger than the ARC on an 8GB system and still slightly larger than the ARC on a 16GB system. Reducing ...
-1
votes
1answer
35 views

ZFS checksum errors: what files are affected?

Here is a zfs pool with checksum errors: NAME STATE READ WRITE CKSUM pool0 ONLINE 0 0 42 c1t1d0 ONLINE 0 0 30 c1t2d0 ONLINE ...
0
votes
1answer
33 views

Samba intermittently timing out on writes to a ZFS share

I'm experiencing an odd problem on a file server intermittently failing when writing files. The problem occurs when I try to write a number of files from a (Windows 7) client at once. ...
0
votes
0answers
35 views

FreeNAS, ZFS, OS X, can't get write access

I have a OS X. I configured server, based on FreeNAS. Setup sharing trough AFP service. Set all permissions for read-write access for users and groups. I do all the same things for one UFS drive and ...
-1
votes
1answer
47 views

zpool import with missing device

I had two geli-encrypted partitions on separate disk in a zpool as simple disks (no raid*). I didn't want redundancy for all files, only for some selected datasets (for which I set copies=2). Now one ...
1
vote
2answers
315 views

How to check that all ZFS snapshots within a pool are without holds before destroying that pool

Question Already I can check each snapshot of a filesystem individually, manually. I would prefer to check all at once (all with a single command or script). Please: can that be done with a ...
1
vote
4answers
1k views

NFS IO priority on ZFS/Solaris

I've got a Nexenta/ZFS NAS that I'm using as an NFS backing store for a small VMware vSphere farm. At the moment I have 9x1TB disks all mirrored (last disk is configured as a write log device). The ...
4
votes
3answers
3k views

When using thin-provisioning with ZFS, how do you make sure you don't run out of physical disk space?

Forgive me if this seems like a fundamental question, but I couldn't really find anything concrete on Google, and I'm not a system administrator by trade. We are setting up a SAN at our office using ...
3
votes
2answers
123 views

What to call ZFS vdev that won't change?

I've got an Ubuntu (13.04) Desktop with ZFS support thanks to the PPA zfs-native/stable. Everything was working really well. I created a RAID-Z1 pool called inground with the following command: ...
3
votes
1answer
95 views

“zpool create” hangs indefinitely

I have a Solaris 11.1 machine which has some disks attached to it via an expander (LSISAS2X36) through an LSI 1068 controller. The setup used to work quite decently, but as I have added another batch ...
0
votes
0answers
80 views

zfs recovery after hardware failure

My ZFS storage hardware failed including the rpool disks. I installed a new server and tried to import use zfs import -f poolname. I am able to see the pool and the disk utilized. But I am not able to ...
3
votes
1answer
152 views

Clear a permanent ZFS error in a healthy pool

I scrubbed my pool today, and after the scrub finished, I noticed there was an error that corrupted a file. I didn't care about the file, so I deleted it. Unfortunately, the error remains (now ...
0
votes
1answer
101 views

Using SATA III SSDs for ZFS pools

I'm thinking of building a ZFS server optimized for random access (PostgreSQL database). I figured that I have 2 options: Use pools consisting of the Crucial M500 960 GB SATA III SSDs. Enterprise ...
1
vote
1answer
47 views

ZFS booting troubles

I have FreeBSD 8.0, and rebooting arise while zfs scrub was runing. Now when system booting it frezee at moment with ZFS version and ZFS pool version. I can't even login. The question : Is the scrub ...
5
votes
2answers
63 views

Is it Possible to Automatically Resilver a ZFS Array On Hotswap

I'm trying to learn about ZFS for a NAS I'm planning on building. I'm trying to understand if the following scenario would be possible to set up. Disclaimer: I know very little about ZFS, so forgive ...
2
votes
1answer
183 views

ZFS, NFS and Nexenta

Is this message familiar to someone ? zfs-clu-01a rpcmod: [ID 851375 kern.warning] WARNING: svc_cots_kdup no slots free zfs-clu-01a last message repeated 75220 times We have a lot of trouble ...
2
votes
0answers
96 views

ZFS on RedHat configuration

I have to set up a ZFS storage appliance (Oracle ZFS Storage ZS3-2) with NFSv4. The NFS is mounted on a Redhat 6.5 cluster, where the linux users are created (they don`t exist on the appliance). ...
5
votes
1answer
56 views

Is “zfs receive” an atomic operation?

Is zfs receive an atomic operation? Can a process read from or write to the receiving file system during the zfs receive operation? Can a process read any of the files in the incoming snapshot ...
4
votes
4answers
151 views

ZFS: Memory issues with dedup even though zdb -DD looks fine

I've been experimenting with ZFS on a machine with Ubuntu 12.10, 32GB RAM (non-ECC, production system will have ECC) and a 2x2TB Linux-managed RAID1 (will be moved to RAIDZ1 for production). I just ...
3
votes
1answer
44 views

Expanding ZFS on MDRaid?

I had a 4-disk mdraid of 8.12TB with zfsonlinux's ZFS: # zpool status pool: tank state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM tank ...
-2
votes
2answers
188 views

Why does a failed ZFS disk still seem to work fine?

Two disks just failed in my zpool with read/write errors, so I took them out and inserted them in another host, created a zpool just with them, and filled the file system with dd if=/dev/zero ...
2
votes
1answer
97 views

XenServer Linux guest booting off iSCSI SAN (ZFS storage): Will a non-checksumming guest file system still be at risk?

We are storing files on FreeNAS 9.2 using ZFS. I love the data integrity claims made by ZFS, having randomly lost data in the past on servers using ext3, XFS, and ReiserFS that were not mistreated ...
2
votes
1answer
123 views

ZFS, NFS and user based quotas

I am using a ZFS storage (FreeNAS 9.1) with NFSv3. The NFS is mounted on Debian machine, where the linux users are created (they don`t exists on FreeNAS). How do I enable standard linux user based ...
3
votes
4answers
11k views

Disabling RAID feature on HP Smart Array P400

I'm planning to use ZFS on my system (HP ML370 G5, Smart Array P400, 8 SAS disk). I want ZFS to manage all disks individually, so it can utilize better scheduling (i.e. I want to use software RAID ...
2
votes
1answer
49 views

Choosing a zpool size?

Is there a rule of thumb when to create a new zpool instead of expanding the current? Right now I have 100TB and can either expand with another 100TB or create an extra.
9
votes
2answers
364 views

Are consumer class hard disks okay for zfs?

I just recently bought a new server an HP DL380 G6. I replaced the stock smart array p410 controller with an LSI 9211-8i. My plan is use ZFS as the underlying storage for XEN which will run on the ...