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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ZFS: how to replace disk that faulted while resilvering after another fault?

A disk replacement in ZFS went awry, and now the replacing disk, even though no longer physically present, is "stuck" in the pool, blocking further replacement attempts. How to remove it? In a raidz3 ...
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10 views

Drawbacks of a single drive split into partitions and partitions joined into a ZFS raidz1, vs. single drive ZFS with data duplication?

I'm looking for a minimal ZFS setup to achieve self-healing on a single device. Since I back up my data, drive failures are no concern, but bit-rot is. So far, the only suggestions I've been able ...
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1answer
70 views

ZFS reads on FreeBSD incredibly slow

I have a FreeBSD 10.0 system on which I have MySQL running with its InnoDB database files stored on ZFS. It seemed to have been going fine for months, but lately, and seemingly suddenly, performance ...
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3answers
2k views

ZFS: How do you restore the correct number of copies after losing a drive?

With zfs, if you have copies=2 and then you lose a drive containing some of those copies, how do you tell the system that it should make a new copy of the data blocks for the affected files? Or does ...
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5answers
3k views

Identify Disks on SuperMicro server running FreeBSD

I am running on a SuperMicro 2U server with 6 disks in a ZPool. I want to identify each drive bay using the Drive Carrier LED from running a command from a tool in FreeBSD. Is there a way to do this? ...
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2answers
28 views

ZFS never mounts my pool automatically, why?

I'm running ZFS on Linux on my workstation, and have been for about two years: [ 273.779699] SPL: Loaded module v0.6.4.2-1~vivid [ 273.824212] ZFS: Loaded module v0.6.4.2-1~vivid, ZFS pool version ...
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3answers
1k views

Are there any PCIe SSD cards compatable with OpenIndianna (OpenSolaris) and/or FreeNAS (freebsd) 8+?

Has anyone had any success at all with any PCIx SSD cards around the 200GB+ mark under FreeNAS 8 or OpenIndiana? Specifically either of these platforms because of ZFS support for which we'd be using ...
2
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1answer
66 views

Advice for building production 140 disk (420 TB) ZFS zpool

I have been tasked to build a large zpool for a data recording system. Using ZFS on Linux (0.6.4.2), on CentOS 6.5. Hardware specs: DL380 Gen8 80 GB ram 2x HP HBA H221 2x HP D6000, each with 70x ...
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2answers
225 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 ...
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1answer
76 views

No more space on FreeNAS 9.3. But only half of space actually in use based on “du -sh” command

This morning I got a warning on my FreeNAS 9.3 machine about "Not enough space" warning: The capacity for the volume 'SeanVolume' is currently at 85%, while the recommended value is below 80%. It's ...
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2answers
2k views

iSCSI: LUNs per target?

My question relates specifically to ZFS/COMSTAR but I assume is generally applicable to any iSCSI system. Should one prefer to create a target for every LUN that you want to expose? Or is it good ...
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2answers
986 views

Too much free space on FreeNAS - ZFS

I have a FreeNAS server with 3 x 2 To disks in raidz1. I would expect to have about 4 To of space available. When I run zpool list I get: [root@freenas] ~# zpool list NAME SIZE USED AVAIL ...
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2answers
3k 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 ...
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0answers
35 views

zfsonlinux, raidz1: two disk corruptions: How I can use dd/dd_rescue and deceive zpool?

I have zfsonlinux (Centos 7), and raidz1. And I have trouble: two disks are dying. The first disk have Raw_Read_Error_Rate failure in SMART and Reallocated_Sector_Ct error (the disk has run out of ...
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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, ...
2
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0answers
29 views

zpool import one or more devices is currently unavailable

zfs drives from a FreeNAS that wouldn't power up after a move. Pulled the disks, scrapped the box, now I can't import any pools. I've tried zfs on Linux and freeNAS from shell on my laptop (using ...
2
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1answer
41 views

Why isn't my ZFS pool expanding using ZFS on Linux?

I have a ZFS zpool on linux under kernel 2.6.32-431.11.2.el6.x86_64 which has a single vdev. The vdev is a SAN device. I expanded the size of the SAN, and despite the zpool having autoexpand set to ...
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2answers
2k views

Dell PERC 4/DC (PowerEdge 2850) and ZFS

I understand that ZFS prefers to have as much data about the drives as possible, and that the best thing to do is turn off RAID. The hardware environment is a Dell PowerEdge 2850 with PERC 4/DC and ...
0
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0answers
30 views

ZFS - Reconnecting a disconnected but fully intact disk

If a disk gets disconnected from a ZFS array, but the drive itself if totally fine, what happens when you reconnect it? For example, if I have a mirror of 2 drives, if one is disconnected, then ...
1
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1answer
32 views

Persistent ESXi iSCSI datastore from guest VM based target? [closed]

I'm in the process of building a home lab environment for Cisco and VMware that will also double as a NAS. The system runs ESXi v6.0 bare metal. Part of my design is that I have a Lenovo TS440 with ...
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1answer
1k views

Ubuntu client can't mount Nexenta NFS

I have a Nexenta storage box (Solaris), which exports an NFS share. Mac OS X and older Ubuntu clients can mount the NFS share just fine without any special options. Later version of Ubuntu simply ...
3
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3answers
403 views

Is it safe to boot a linux server from a USB drive?

I have an HP DL360 G7 server I plan to install KVM and ZFS on. The purpose is going to be a lab in a box. I have the 8 drive bays in the front loaded with 4 drives and an SSD (for the ZFS ZIL cache). ...
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2answers
3k views

Is there a tool for managing FreeBSD jails that knows about ZFS?

ZFS under FreeBSD lets one assign filesystems to a jail, such that an account in the jail with the appropriate privileges can access the filesystem, create new subordinate filesystems, and so forth. ...
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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 ...
0
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1answer
108 views

OpenZFS on OSX filesystem dataset performance issue

tl;dr - My ZFS RAIDZ2 array reads at 7.5+ GB/s and writes at 2.0+ GB/s when I specify a bs=128K or greater with dd. OS X is assuming 1K (as per stat -f %k .) and all my is ~300MB/s; dd gives the same ...
2
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2answers
114 views

ZFS online disk migration

I'm wondering if ZFS can handle the following. Say I have FreeBSD installed on a zpool with two physical 500GB disks in a mirrored setup. These form the root partition, so only a maximum of 20GB is ...
1
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1answer
38 views

ZFS estimated send size much larger than total data size

From zfs send -R -v pool/fs@snap: send from @ to pool/fs@snap estimated size is 6.50T ...but from zpool list: NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT pool 3.62T 2.36T 1.27T ...
8
votes
1answer
605 views

FreeNAS ZFS Kernel Panic

I'm running FreeNAS 8 and my computer had a hard reset from a power outage and now every time I try to boot I get the following error message: Error Message: panic: zfs_replay_acl_v0:898: unsupported ...
0
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1answer
33 views

ZFS: what does it mean if all disks are ONLINE but resilvering takes place?

I have a pool of four raidz1 on Solaris 10, three of which look like this: state: ONLINE status: One or more devices is currently being resilvered. The pool will continue to function, ...
2
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2answers
273 views

ZFS cksum errors on LSI 9207-9i (SAS2308) with Samsung 850 Pro SSDs

I am testing an LSI 9207-8i controller with 8x Samsung 850 Pro 256GB SSDs attached. SSDs are running latest firmware EXM02B6Q, controller is running P17 and has exhibited same issues with P19. Server ...
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2answers
87 views

zfs error behind LSI raidcontroller

So ZFS is reporting some "read issues", so it would seem that this disk is failing, based on the fact nothing given in the ZFS-8000-9P document reports has occurred we are aware of. These disks are ...
2
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2answers
144 views

Why does a ZFS resilver scan the entire pool?

I have a zpool where I have just replaced a failed disk, and started a resilvering to the new disk. What I don't understand is, why zpool status says it want to scan 129TB, when the size of the vdev ...
1
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1answer
37 views

Can I prevent exportfs from from breaking ZFS sharenfs exports?

I'm using ZFS on Linux as a fileserver running Ubuntu Server 14.04 LTS. The ZFS pool shares a number of datasets using it's sharenfs property. Outside of ZFS there are a few additional NFS shares ...
7
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2answers
147 views

Why is ZFS not doing anything with my disk's duff sector?

I was under the impression that if an I/O error occurs during a read from a ZFS pool, two things will happen: The failure will be recorded in either the READ or CKSUM statistic of the relevant ...
1
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2answers
41 views

Having trouble mapping solaris drive paths to physical disks

I have a supermicro box with 24 drives in front and 12 drives in back. It's running x86 solaris 10 with zfs. Here is the output of zpool status: NAME STATE READ WRITE ...
2
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0answers
39 views

why are zfs on linux transfer rtates reported incorrectly after expanding array?

I have upgraded the drives in a 4 drive Raidz array in a NAS server and the array has auto expanded to the new size. In testing transfer rates from the NAS server now I observe that when performing ...
-1
votes
1answer
50 views

ZFS on USB disks isn't mounted on boot [closed]

I have a ZRAID on two disks on a disk hub connected to the server via USB 3.0. The system is FreeBSD 10.1. Now even though the ZRAID gets imported on boot, it doesn't get mounted. I've set a mount ...
9
votes
7answers
4k views

Anybody have experience with using Nexenta? [closed]

I'm evaluating the Nexenta platform to hopefully one day replace our legacy file servers. I would primarily use it as a CIFS server in an Active Directory environment. Anyone out there have any ...
3
votes
5answers
3k views

Handling XenServer snapshotting and cloning with ZFS SAN

I'm planning on setting up a XenServer machine that uses a NexentaOS/ZFS-based SAN for storage of the Virtual Disk Images (VDIs) through iSCSI. I know I could just setup a big Storage Repository (SR) ...
1
vote
1answer
34 views

Can I “flush and lock” an Oracle database to do a filesystem backup?

I'm using ZFS to take snapshots of running OpenVZ containers. For MySQL databases I can use flush tables with read lock to put them in a flushed & locked state. This will put the underlying files ...
12
votes
12answers
7k views

Best compression for ZFS send/recv

I'm sending incremental ZFS snapshots over a point-to-point T1 line and we're to a point where a day's worth of snapshots can barely make it over the wire before the next backup starts. Our send/recv ...
1
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0answers
31 views

zfs pools unavailable, disks shared with other pools

My ZFS pool called data do not mount anymore after a shutdown. Maybe there was some automatic update on the computer. I Don't know. zpool status returns no pools available zpool import returns ...
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2answers
88 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 ...
3
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1answer
62 views

zpool disappears whenever solaris cluster reboot or power cycle

I have following setup Oracle Solaris 10 -> 5.10 Generic_147147-26 sun4v sparc Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit production Oracle Solaris Cluster 3.3u2 for Solaris ...
0
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1answer
49 views

NFS client, ZFS Server ZoL: cat to changed file ends with not found

We get in trouble since an update from our clients from Ubuntu 12.04 to Ubuntu 14.04. The behavior: On client A I change an existing file foo on a nfs share. On client B I do a cat foo. 1st time ...
2
votes
3answers
883 views

Nexenta/OpenSolaris filer kernel panic/crash

I've an x4540 Sun storage server running NexentaStor Enterprise. It's serving NFS over 10GbE CX4 for several VMWare vSphere hosts. There are 30 virtual machines running. For the past few weeks, I've ...
1
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1answer
41 views

How much memory is required to send deduplicated ZFS stream?

Last year I set up a pair of servers for my employer, running FreeBSD 10.1 with a large pool of storage in each server. 12 x 2TB disks, in a zpool configured as two raidz2 vdevs of six disks each. One ...
6
votes
3answers
3k views

Where can I find introductory documentation for ZFS?

I recently installed OpenIndiana because of an interest in ZFS. I like the feature-list of ZFS, but I'm having a hard time wrapping my head around how to configure it. All of the documentation I ...
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1answer
4k views

NFS issue brings down entire vSphere ESX estate

I experienced an odd issue this morning where an NFS issue appeared to have taken down the majority of my VMs hosted on a small vSphere 5.0 estate. The infrastructure itself is 4x IBM HS21 blades ...
10
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4answers
4k views

Can I trust that ZFS is consistent between Linux and FreeBSD?

I'm planning to build a FreeNAS box sometime soon, but if ZFS on Linux eventually proves to be reliable, I might want to switch, just to have a more familiar OS. So I'm wondering if I can trust that ...