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 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 ...
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1answer
15 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) ...
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2answers
51 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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2answers
63 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
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0answers
102 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
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2answers
35 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 ...
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27 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 ...
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1answer
27 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?
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1answer
20 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
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1answer
118 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 ...
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34 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 ...
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63 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 ...
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53 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 ...
2
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3answers
656 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 ...
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3answers
488 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: ...
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2answers
82 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
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2answers
81 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 ...
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22 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 \ ...
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2answers
212 views

mounting ZFS zvol snapshot locally gives “Invalid argument”

I'm trying to mount a snapshot of a ZFS zvol. The zvol should have a ext2 partition on it (as evidenced by the CentOS VM to which the zvol is currently shared by iSCSI): [root@test-vm ~]# file - ...
1
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1answer
92 views

Setup ZFS on freeBSD from bsd-rescue

I have a server from OVH and have the following procedure of setting ZFS on FreeBSD10 on OVH server following the https://wiki.freebsd.org/RootOnZFS/GPTZFSBoot/Mirror Creating a bootable ZFS ...
10
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1answer
258 views

Why did rebooting cause one side of my ZFS mirror to become UNAVAIL?

I just recently migrated a bulk data storage pool (ZFS On Linux 0.6.2, Debian Wheezy) from a single-device vdev configuration to a two-way mirror vdev configuration. The previous pool configuration ...
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24 views

Can I force nfsd on Solaris to announce more free space than physically available?

I'm working with various Solaris based distributions (OmniOS, SmartOS, Nexenta) and I have a highly compressible and deduplicable data set on a very small amount of high performance storage. The ...
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1answer
55 views

Is it possible to disable zfs self-healing without disabling checksums?

I would like to disable ZFS self-healing in case of scenario as described here: https://pthree.org/2013/12/10/zfs-administration-appendix-c-why-you-should-use-ecc-ram/ In that scenario bad RAM (ECC or ...
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1answer
102 views

I/O Errors but no smart or ZFS errors

I'm having trouble to identify a problem for a friend of my. He is running ZFS on Linux with the Debian distribution. We are getting these entries into the dmesg. [273044.834151] mpt2sas0: ...
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1answer
212 views

Where is the overhead for ZFS RAIDZ2 on 4K sector disks going?

I started by creating 16 empty files of exactly 1 billion bytes: for i in {1..16}; do dd if=/dev/zero of=/mnt/temp/block$i bs=1000000 count=1000 &> /dev/null; done Then I created larger and ...
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2answers
59 views

How can I determine what RAIDZ level my volume is using?

I am looking at a ZFS volume on FreeBSD system, and I have no idea what RAIDZ level it is configured at. How can I find out using the ZFS command line or other? I tried "zpool status" already, and ...
1
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1answer
45 views

ZFS snapshots and atomic updates

So I'm tinkering around with ZFS on linux and zrep. I've got 2 VMs on my laptop and I'm running zrep and synchronizing the contents of one filesystem to another. One unexpected situation is this: ...
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71 views

Debian 7 auto mounting .zfs snapshot directory

Today I come with another weird thing on Debian 7 that I cannot explain myself.. Context : Os: Debian7 Kernel: Linux http-apache-01a 3.2.0-4-amd64 #1 SMP Debian 3.2.54-2 x86_64 GNU/Linux This system ...
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2answers
103 views

ZPOOL replace defective disk in exported pool

Yesterday, I put a new disk into my server. Sadly, I didn't check the disk before of failures. I added it to my pool with the command zpool add nas ...
5
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1answer
200 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 ...
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1answer
193 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 ...
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2answers
600 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 ...
1
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1answer
278 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 ...
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2answers
439 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 ...
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2answers
163 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
511 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: ...
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2answers
255 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? ...
2
votes
2answers
128 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. ...
0
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0answers
120 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
2answers
388 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
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2answers
124 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 ---> ...
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0answers
323 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
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1answer
161 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 ...
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2answers
63 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.
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3answers
475 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 ...
4
votes
1answer
302 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 ...
0
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1answer
342 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
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1answer
104 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
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1answer
523 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
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1answer
83 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 ...