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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36 views

FreeNAS zfs zraid two failing disks

I have a FreeNAS 8.3 file server with ZFS running four 3TB disks in raidz. camcontrol devlist: at scbus0 target 0 lun 0 (pass0,ada0) at scbus1 target 0 lun 0 (pass1,ada1) ...
2
votes
1answer
95 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 ...
0
votes
1answer
71 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
2answers
152 views

Where are zfs settings written?

On FreeBSD 10.0, when one creates zfs partitions and configures where they are mounted (permissions, etc.), where is this information stored? /etc/fstab is largely empty. i.e.: $ zfs mount ...
4
votes
1answer
151 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 ...
-1
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0answers
29 views

Lost ZFS partition due to parted input error

I had 2 disks in my system. One 2TB and One 3TB disk. On the 2 TB was a ZFS pool.The partition layout was: root@debian:~# parted /dev/sdc GNU Parted 2.3 Using /dev/sdc Welcome to GNU Parted! Type ...
0
votes
2answers
81 views

Cannot get ZFS pool created in OSX to import on Linux system [closed]

I'm experimenting with different file systems for use between a dual-booting Linux/OSX laptop which will act as a testing platform. Despite being a BSD variant, I've had a lot of trouble finding a ...
2
votes
1answer
71 views

zfs pool failing import with online disks and status

While preparing to move a zfs pool to another server chassis I did an 'zfs export' while in multi-user mode. Hindsight I should have have done this from a rescue disk. After the export, which ...
1
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1answer
51 views

Should I create ZFS zpools with whole disks or partitions?

I am making zpools on FreeBSD machine. While creating zpools i observe these two cases:- If i take raw disks and create zpool then i am able to form zpools and they are working perfectly. If i ...
-1
votes
1answer
17 views

How to specify the path which is to be tested using iozone?

I have a freebsd install which has ufs filesystem. Inside freebsd i have created a zpool in raidz1. Now i want to perform iozone test on zfs but i am not able to understand how to specify that iozone ...
2
votes
1answer
112 views

Cluster-Shared Volume on Windows Server 2012 R2 drops off with minor iSCSI pauses

We are running into an issue here where the Cluster-Shared Volume attached to our Hyper-V 2012 R2 cluster is being dropped off / faulted with the slightest interruption from the iSCSI SAN connection ...
1
vote
1answer
52 views

Touching ZFS volume causing OS to freeze, drives reportedly OK

Having massive issues with 4 brand new 3TB WD Red drives I just got. Trying to setup raidz2 using "native zfs" with all 4 on ubuntu 14.04.1, which works initially until I start trying to copy data ...
4
votes
1answer
136 views

File is different when read from NFS server

So I have a backup server we've been using for some time, it's a FreeBSD server running zfs and serving it over NFS. The export is simple: /backup/vm -maproot=root -alldirs. If relevant, that was ...
0
votes
2answers
52 views

How to partition drive for ZFS

I'm trying to create a ZFS pool using the following command: zpool create MyPool disk /dev/sda However, I get the following error: cannot use '/dev/disk': must be a block device or regular file ...
0
votes
1answer
41 views

Can't find created directory on zfs

I'm using openSUSE 13.1. I created a new directory on a zpool zfs create zpgd0/iSCSI -o compression=lz4 -o atime=off but I'm not looking on that... So I do it again but I'm getting... zfs create ...
1
vote
1answer
89 views

Disabling ZFS cache 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 ...
1
vote
2answers
56 views

Ways to setup a ZFS pool on a device without possibility to create/manage partitions?

I have a NAS (Synology DS214 with DSM 5.0) where I don't have a possibility to create and manage partitions (maybe I could with some hacks that I don't want to make). What ways to setup multiple ZFS ...
0
votes
2answers
104 views

Can I choose a sparse file as vdev for a zfs pool?

man zpool states that a vdev for a zfs pool can be a "regular file". Can I specify a sparse file (the warning about the integrity of the file being determined by the underlying filesystem should ...
7
votes
1answer
109 views

How does quota usage for ZFS on Linux work?

I have a user who according to ZFS is at their quota. However, I cannot find how they are using all of their space. This file system has no descendant file systems and according to the man page the ...
3
votes
1answer
107 views

Why would zfs performance be bad for moving files within an fs?

On my FreeNAS NAS (9.1.1 running zfs v28), I am getting terrible performance for file moves between two directories in the same raidz fs. Is this expected? How can I fault-find this, if not? The ...
0
votes
1answer
52 views

How big are my disk arrays?

On my SunOS 5.10 host are there 3 Sun 6140 disk arrays, and I would like to know the disk capacities. According to zpool list do I have a 5TB and 16TB pool. format shows me only 12 disks c2t1d31: ...
1
vote
2answers
1k views

Transparent compression filesystem in conjunction with ext4

I am trying to test a project that needs compressed storage with use of the ext4 file system since the application I use relies on ext4 features. Are there any production/stable solutions out there ...
1
vote
1answer
88 views

Is a degraded RAIDZ2 the same as a RAIDZ?

Background on this question: I have a litte server with five HDDs pooled together in a RAIDZ. Last week one of my HDDs died. So I bought a new HDD and replaced the dead HDD. During the resilvering the ...
2
votes
1answer
110 views

iSCSI: HP MSA 2012i, initiator only discovers one target

I am trying to configure my HP MSA 2012i such that every disk is a vdisk and every vdisk is a volume. Each volume shall be accessible using iSCSI. So each volume shall be a iSCSI target. This is not a ...
3
votes
2answers
420 views

FreeBSD 10 won't boot to ZFS root after power failure

While installing new hardware today, I involuntarily disconnected the power to one of our servers. This server is running FreeBSD 10 with Root-on-ZFS as offered by the installer. It has a total of 36 ...
0
votes
2answers
144 views

Can a NetApp disk array be used as a JBOD?

I have a bunch of (old) NetApp DS14MK2 disks arrays with Fibre Channel connections. I wouldn't use them to anything critical, but instead of throwing them out, could I use each of them as a separate ...
0
votes
2answers
52 views

Possible to put larger disks in LSI arrays?

I have a couple of these LSI arrays LSI Model: 0834 LSI Class: 3600 LSI Name: LSI Engenio LSI product name: 1932 LSI Product codename: Mary Jane Enclosure name: Shea (DM1300) End of Life: 31-Dec-2010 ...
0
votes
1answer
43 views

Why is the size of a zfs filesystem after sending it to a different pool different?

I've move a zfs filesystem from a pool made of a bunch or mirror vdevs to another pool made of two raidz1s with the following command # zfs send -R pool/project@moving | zfs recv tank/project As ...
0
votes
1answer
167 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 ...
7
votes
2answers
134 views

Array free space requirement

The general rule of thumb is don't use more than 80-85% of your capacity, otherwise performance degrades sharply, and other bad stuff may happen. On a 8TB array, this comes out to around 1.6TB of ...
1
vote
2answers
63 views

2 drive failures in zpool raid

I have a question if I'm going to be able to restore this partition if I order replacement drives. zpool clear didn't seem to do anything. zpool status Partition1 ...
2
votes
1answer
189 views

Arranging a raidz3 ZFS vdev to tolerate entire JBOD failures?

Let's say I'm going to build a very large 1PB zpool. I'll have a head unit with the HBAs inside of it (maybe 4 port LSI SAS cards) and I will have perhaps 7 45-drive JBODs attached to the head unit. ...
8
votes
1answer
183 views

What happens if I force ZFS to detach a hot spare with no valid replicas?

I have a ZFS pool made out of 6 RAIDZs. One of the RAIDZ is degraded, due to loosing two disks in the single RAIDZ close enough together that ZFS wasn't able to recover from the first failure before ...
0
votes
0answers
73 views

zfs checksum verfication failed, solaris booting failed

Looks like my solaris 10 got hosed overnight for unknown reason. I get below error while booting and also when trying to cat menu.lst file in grub. Hard disk is being detected by ubuntu so it may not ...
0
votes
1answer
168 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
489 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 ...
2
votes
2answers
145 views

Unmounted ZFS filesystem

I inherited a FreeNAS setup with ZFS mounts. I ran through this crash course on ZFS (no previous experience), but it doesn't answer my question. I have this list when I run zfs list: [root@nas] ~# ...
3
votes
1answer
178 views

ZFS on LUKS not recognized at boot

I've got 6 physical drives in RAID-Z2, which I intend to one-by-one convert to dm-crypt devices. My process was roughly: dd if=/dev/zero of=/dev/sdf Create keyfile /etc/crypttab.d/crypt-1.key ...
3
votes
2answers
381 views

Encryption with ZFS on linux

Does ZFS on Linux already support Encryption? If not, is it planned? I found tons of info for ZFS+LUKS but that's absolutely uninteresting: I want ZFS encryption so that I can do replication using ...
1
vote
0answers
64 views

Can I use ZFS to replicate (fast) EC2 instance store to (slow) EBS store?

I love the idea of using SSD EBS instance stores as L2ARC and ZIL for a zpool backed by EBS. Going further (and into more dangerous territory), could I instead create a zpool mirror with the 2 ...
1
vote
1answer
34 views

Does hot spare limit write speed in ZFS?

Let's say I have a ZFS pool with a fast SSD and I want to add a magnetic hot spare. Will the pool slow down to the hot spare's speed?
2
votes
1answer
25 views

is zfs snapshot -r of several pools atomic?

Let's say I've got 2 zpools -- one with a database's database files and one with the database transaction logs. If I do a zfs snapshot -r database@snapshot will the resulting snapshots all be taken ...
3
votes
1answer
236 views

How to active HDD leds on HP MDS 600 / HP D6000?

I have a HP D6000 (sometimes called MDS 600) storage array, HP DL380p G8 with an LSI 9207-8e SAS adapter. When I am in the OmniOS (Solaris 10 fork), I can e.g. dd to one of the disks, but I don't see ...
1
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0answers
70 views

GlusterFS and ZFS snapshots

I know many people are using GlusterFS on top on ZFS. I'm wondering about snapshots: how do you ensure snapshot homogeneity among the nodes? I mean if you do a snapshot on a node, how can you be sure ...
1
vote
2answers
287 views

ZFS RAID0 pool without redundancy

I created a ZFS pool on Ubuntu 14.04 without specifiying RAID or redundancy options, wrote some data to it, rebooted the machine and the pool is no longer available (UNAVAIL). I don't have the exact ...
3
votes
0answers
108 views

Using ZFS head node as database server?

I'm using a dual-head ZFS-backed NAS for high availability cluster shared storage, based on Nexenta's recommended architecture as seen here: The disks in 1 JBOD will store the database files for a ...
4
votes
4answers
2k views

ZFS on linux upgrade from 0.6.2 to 0.6.3 made my zpool unreadable help translate CentOS to Ubuntu commands

After upgrading my ubuntu 13.10 server using sudo apt-get upgrade and rebooting, my zpool wouldn't show. messier@ANDERSON:~$ sudo zpool status no pools available messier@ANDERSON:~$ sudo zpool import ...
4
votes
3answers
899 views

Update from zfs-0.6.2-1.el6.x86_64 to zfs-0.6.3-1.el6.x86_64 has made by zpool unreadable

After running # yum update zfs and restarting my CentOS 6 ZFS on Linux system can no longer see or interact with it's zpools. # zpool status no pools available # zpool import zpool: ...
3
votes
2answers
100 views

Mimicking Google's Persistent Disks — Is this a logical FreeBSD disaster recovery strategy?

I am looking into FreeBSD to provide a more comprehensive backup and disaster recovery strategy for database servers. Ideally I want to mimic what google is doing with "Persistent disks" ...
2
votes
2answers
117 views

When to use hot-spare?

On my newly purchased HP MDS600 with 70x 4TB Nearline SAS disks, I now need to configure the disks, and I want raidz2, so the raid sizes follows 2^n+2. The options I therefore have are 7 raid sets ...