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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2answers
4k views

VMware ESXi and ZFS hardware & configuration recommendations [closed]

I want to finally spend a little money upgrading my company's virtualization infrastructure, but I've been looking at hardware for a couple of weeks now and I'm not quite sure what's appropriate for ...
4
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0answers
18 views

User permissions/feature limitations of the native zfs smbshare service on linux

I'm using zfs on linux, using the sharesmb=on option to try out the native smb share feature instead of adding the zfs tank path to my smb.conf file. The share has shown up on my windows machines, ...
2
votes
2answers
93 views

Understanding zpool status output

I'm having difficult understanding the output after running the zpool status command: NAME STATE READ WRITE CKSUM tank ONLINE 6 0 0 raidz2-0 ONLINE ...
1
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0answers
35 views

Slow performance due to txg_sync for ZFS 0.6.3 on Ubuntu 14.04

I am using native ZFS with "ZFS on Linux" installed from the PPA here. Setup was not a problem and I am using it in mirrored configuration with two WD 4TB Red HDDs. Unfortunately I am having ...
0
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0answers
19 views

freenas disc problems - smart error - how to repair zfs raid?

I have troubles with my freenas 9.2.1. It crashed today. Its running a fileserver on zfs jbod raid 2. I'm not sure what exactly causes the problems. The system is booting however reacting pretty slow. ...
2
votes
1answer
825 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 ...
4
votes
2answers
605 views

ZFS volume as ISCSI target

I'm looking into ZFS and using FreeNAS for ZFS management and have the following question: Do the ZFS advantages as deduplication, auto error fixing etc still work when creating an iSCSI target on a ...
0
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2answers
406 views

FreeBSD 10: NFS unable to export folder

I am unable to export a folder using NFS. /etc/exports /storage/test -maproot=nobody client /storage/test1 -ro -maproot=nobody client /storage/test2 -ro -maproot=nobody client The first folder ...
4
votes
2answers
2k views

Backup ZFS snapshots to tape (both full and diff)

What would be the best way to implement an LTO tape-based backup system on a ZFS fileserver? I've got about 6TB that need to be backed up on a daily basis, along with an existing HP 1840 LTO4 tape ...
2
votes
1answer
401 views

ZFS: SAS v SATA - does it matter?

I understand from NEC's white paper, Silent data corruption in disk arrays, that: some SAS drives should have a "T10-DIF" feature to detect silent data corruption; whereas "There is no standard for ...
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0answers
4 views

Ubuntu Home Server Packetstorm [migrated]

I have a home plex server that runs various pieces of software and fills various roles. It's running the latest Ubuntu with all the latest packages/updates. About every 10 days or so, it starts packet ...
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 ...
1
vote
2answers
42 views

ZFS - Recover or repair a corrupted file in a snapshot from backup

A pool has suffered permanent data corruption to file data that's part of a snapshot. If the file data was part of the filesystem (and not part of any snapshot), I could simply recover the file from a ...
2
votes
1answer
52 views

Nexentastor CE on Supermicro X10DRL-I

I'm writing here because after 3 hours i'm still not able to install NexentaStorCE on my brand new server. The hardware configuration is: Supermicro x10drl-i Xeon E5 2609V3 16GB DDR4 Kingston I'm ...
2
votes
0answers
83 views

ZFS - zpool replace never finishes

I have a 5 x 3TB raidz1 array on a ubuntu 14.04.1 server. Last month, one of the drives died (audible clicking). I was able to replace the drive with zpool replace RAID <dead drive> <new ...
7
votes
5answers
3k views

ZFS: Redistribute zvol over all disks in the zpool?

Is there a way in which ZFS can be prompted to redistribute a given filesystem over the all of the disks in its zpool? I'm thinking of a scenario where I have a fixed size ZFS volume that's exported ...
1
vote
2answers
51 views

ZFS pool members start sectors overwriten, including partition table and L0 L1 labels. Data and L2 L3 labels intact. How to recover?

Have two identical 2Tb disks in mirror ZFS pool. Unfortunately, overwriten start of disks with errorneus attempt to attach them via HP Smartarray P400 RAID controller as separate RAID0 logical volumes ...
2
votes
2answers
433 views

How can I recover overwritten labels, pointer blocks and ueberblocks in a ZFS pool?

I caused a stupid accident in a single-disk ZFS pool, seemingly in the same way as the person in this mailing list thread, i. e., I seem to have overwritten important metadata. Can this be restored ...
2
votes
4answers
114 views

ZFS backup advice with another server

I currently have two servers both have the exact same hardware, disks, etc. One server (server1) is going to be the "main" server. It's basically a server with raidz2 that has SMB shares on it that ...
0
votes
1answer
1k views

FreeNAS/FreeBSD: How to access status of ZFS volume from jail?

I am trying to set up NRPE to enable remote Nagios monitoring of a new FreeNAS 0.91 system. I mostly have this working. I can connect and inquire about basic information like number of processes, ...
19
votes
2answers
543 views

Sanity check on 40TB server configuration

I've got 40 years in computing, but I've never had to build a server quite like this one, so this might be a n00b question. I have a client that is going to offer ultra-high def music files for ...
0
votes
1answer
35 views

Resilvering for data transfer?

I currently have a production server with four drives in raidz2 and a backup server that is identical in configuration and hardware. I'm currently doing a transfer of data using rsync between the ...
0
votes
2answers
33 views

ZFS pool reports a missing device, but it is not missing

I am running the latest Debian 7.7 x86 and ZFS on linux After moving my computer to a different room. If I do a zpool status I get this status : pool: solaris state: DEGRADED status: One or more ...
0
votes
0answers
25 views

Solaris ZFS, cant send/recv to remote encrypted pools?

I'm trying to do a simple task, which is to send a snapshot of a dataset to a remote pool. Both src/dest pools are encrypted. Here is the command I issue: zfs send -R testsnapshot@2014 | ssh ...
1
vote
2answers
145 views

How to delete and reuse ZFS filesystems inside a Pool

I have this ZFS Pool. NAME STATE READ WRITE CKSUM app ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 c1t2d0 ONLINE 0 0 0 ...
1
vote
2answers
113 views

How to migrate a ZFS filesystem to use compression?

Question at the bottom. I have several ZFS file system I would like to use ZFS compression, but since enabling the compression will only affect new data written to the file system, I would like to ...
3
votes
2answers
1k views

zpool import: volume FAULTED with corrupted data, is it possible to save some data?

I was using Freenas 8.2 and decided to upgrade to 9.2. All seem to go well, upgraded zfs to 28 and rebooted. During next boot it seem to take forever and at some point I decided to turn off the ...
0
votes
1answer
24 views

Solaris: Encrypting a zpool NOT a dataset within a pool?

What is the way in Solaris to encrypt a zpool? All the documentation supporting ZFS encryption talk about using "zfs create" and specifying a dataset WITHIN a pool. I just became SA for several ...
8
votes
5answers
10k views

ZFS Sync over unreliable, slow WAN. ZFS replication, or rsync?

I've been tasked with making an off-site backup work over the WAN. Both storage boxes are FreeBSD based NAS boxes running ZFS. Once or twice a week, 15-60 gigs of photography data gets dumped to the ...
2
votes
3answers
746 views

ZFS - Is RAIDZ-1 really that bad?

I have an NAS server with 4x 2TB WD RE4-GP drives in a RAID10 configuration (4TB usable). I'm running out of space (<1TB usable space left). I have $0 to spend on bigger/more drives/enclosures. I ...
4
votes
4answers
4k views

How to determine which disk failed in a FreeNAS / ZFS setup

I'm building out a FreeNAS based server in a Supermicro X6DHE-XB 3U enclosure with 4G of RAM, 16 SATA hot-swap bays. It comes with 2x8 port 3Ware RAID cards, but I'm planning on just using the ZFS ...
2
votes
2answers
118 views

Inplace migrating ZFS RAIDZ with 3 drives to 4 disks, when pool has more than 1/3 of free space

On creating my RAID-Z pool on ZoL I assumed, I could easily just drop-in additional disks later on. Meanwhile I learned that this is yet not possible. But... I had a similar problem on creating my ...
3
votes
3answers
140 views

Does a NetApp NAS provide features with VMware compared to a ZFS based NAS?

Are there feature advantages from a VMware point of view to use a NetApp nas instead of a ZFS based NAS running e.g. OmniOS? Another way to formulate the question: Are there features unlocked when ...
7
votes
2answers
316 views

How can you find the parent snapshot of a zfs clone?

I made a clone of zfs filesystem that has a number of snapshots. I also have several replicated copies of the filesystem. How can I find which filesystem/snapshot a clone is attached to? (Seems ...
2
votes
1answer
94 views

ZFS on Linux + KVM Steals Memory

I'm having an issue with a CentOS 7 server where I have a single ZFS pool created along with (currently) a single running KVM VM (CentOS 6 guest). Top is reporting that the VM is using about 50% of my ...
0
votes
1answer
79 views

Linux ZFS does not buffer writes to write buffer (SLOG/ZIL)?

When experiencing write I/O, the log column in zpool iostat -v does not show any ZIL activity, ever. This results in higher than expected wait times when writing data to disk (sometimes over 80ms ...
34
votes
12answers
24k views

ZFS vs XFS

We're considering building a ~16TB storage server. At the moment, we're considering both ZFS and XFS as filesystem. What are the advantages, disadvantages? What do we have to look for? Is there a ...
2
votes
3answers
216 views

ZFS sample config opinions

Irecently asked a question about the best way to apply 20 2TB drives in a ZFS pool. I have come up with the following setup (thanks to many helpful suggestions) and would love opinions and suggestions ...
2
votes
2answers
229 views

ZFS RAIDZ2 read and write speeds really slow?

I'm running 3 Samsung HD103SJ 1TB and 1 Samsung HD103UJ 1TB under Lubuntu with zfs raidz2, using a HP ProLiant N54L (AMD N54L, 4GB RAM). Moving a 10 GB file between 2 folders on the pool takes 15 ...
5
votes
3answers
344 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
1answer
77 views

add a directory inside freebsd jail

Not sure if this is correct, but i have now installed freebsd 10 on top of ZFS with jails and have created a jail for Mongodb. For the data files I used the following: zfs create -o atime=off \ ...
1
vote
3answers
122 views

Long running VMWare snapshots are bad… but what about VMDKs on a ZFS\LVM snapshot?

The VMWare KB and multiple blogs state that long running snapshots are bad for both performance reasons and integrity. They have valid points. Granted this is not with ESXi but rather ...
0
votes
2answers
410 views

How to disable ACLs on ZFS in FreeNAS?

I inherited a FreeNAS installation that I recently upgraded to version 9. I have some ZFS mounts that are mounted like this: data1/data on /mnt/data1/data (zfs, NFS exported, local, nfsv4acls) ...
3
votes
2answers
2k views

In ZFS, what is the difference between the various zpool versions?

According to this wiki article http://en.wikipedia.org/wiki/ZFS there are a number of zpool implementations out there. For example, OpenSolaris and derivatives are at 28. While FreeBSD 8 appears to ...
6
votes
1answer
1k views

Are ZFS pools or LVM volume groups more reliable for utilizing many partitions?

When deciding whether to use LVM volume groups or ZFS pools in configuring new file servers, what needs to be considered? Is there a "better" choice in the realm of multi-purpose file servers? Unlike ...
3
votes
2answers
94 views

Virtualized Storage for other VMs on ESXi host [duplicate]

This question is two fold. Part 1: Is it a bad idea to virtualize a storage solution and run VMDKs off of that as opposed to the original VMFS datastore. Essentially lets assume I have 2 TB worth ...
1
vote
1answer
470 views

Does a 3ware “ECC-ERROR” matter on a JBOD when I have ZFS?

I have a FreeBSD 8.x machine running ZFS and with a 3ware 9690SA controller. The 3ware controller shows an ECC-ERROR with one of the disks: //host> /c0 show VPort Status Unit Size ...
2
votes
2answers
397 views

Alternative file system/volume manager for ZFS w/ non-ECC RAM?

It's not recommended to use ZFS for a computer without ECC RAM. So, what's a good alternative then? Or is the risk the same, so it doesn't matter what manager I use, it'll be the same problem if a bit ...
2
votes
1answer
1k views

ZFS Recover from Faulted Pool State

I have a six disk ZFS raidz1 pool and had a recent failure requiring a disk replacement. No problem normally, but this time my server hardware died before I could do the replacement (but after and ...
1
vote
1answer
226 views

Disabling cache on ZFSonLinux

Using ZFS to take advantage of some of the available options and to manage volumes, not the RAID. I have a single logical device (HW RAID) added to a zpool. The ZFS ARC does not seem to perform as ...