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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8
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4answers
4k views

Is FreeNAS ready for the enterprise?

I am having a bit of split in thought. I am looking at getting a NAS for my company, we need it for our VMware server. Originally the idea was to buy a NAS (a Netgear ReadyNAS) But then I got some ...
0
votes
2answers
43 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
30 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
33 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
27 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 ...
1
vote
2answers
34 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 ...
5
votes
2answers
114 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 ...
3
votes
4answers
892 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 ...
2
votes
1answer
75 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. ...
7
votes
0answers
76 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 ...
2
votes
2answers
566 views

A few questions about RAID-Z

I just got 3 one terabyte HDDs to put into my small NAS box. I plan on raiding these together with RAID-Z (ZFS, if I'm not mistaken). I've done a lot of research, but there doesn't seem to be very ...
0
votes
0answers
21 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 ...
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
0answers
118 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
68 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
29 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
47 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 ...
2
votes
2answers
72 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
0answers
65 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 ...
3
votes
2answers
1k 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
3answers
564 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: ...
1
vote
0answers
35 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
29 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?
1
vote
2answers
88 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 ...
2
votes
1answer
22 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
132 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
vote
0answers
36 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 ...
2
votes
3answers
692 views

How to run a command once a ZFS scrub *completes*?

I would like to use cron to schedule periodic scrubs of my ZFS pool, and at some reasonably short time after the scrub finishes, email a status report to myself. The purpose of this is to catch any ...
2
votes
2answers
91 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 ...
2
votes
2answers
1k views

How to remove the OpenSolaris ZFS dump device

The ZFS dump device is used only for debugging problems. In this case, I have decided the risk vs reward is such that I should delete the dump device to make room for other storage. I am able to ...
4
votes
1answer
884 views

scsi and ata entries for same hard drive under /dev/disk/by-id

I am trying to set up a ZFS pool using 4 bare drives which I have attached to my Ubuntu system via a SATA hot swap backplane. These are Hitachi SATA drives. When I list the contents of ...
3
votes
2answers
84 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" ...
1
vote
1answer
83 views

ZFS root pool free space

I have an openindiana (oi_151a7) box where I used 30GB for the root partition during installation. This has become rpool1. I cannot figure out how to make the remaining 202 GB available. Looking for ...
2
votes
3answers
872 views

zfs rename/move root filesystem into child

Similar question exists but the solution (using mv) is awful because in this case it works as "copy, then remove" rather than pure "move". So, I created a pool: zpool create tank /dev/loop0 and ...
11
votes
1answer
272 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 ...
3
votes
2answers
267 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 - ...
0
votes
0answers
25 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
1answer
84 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 ...
1
vote
1answer
124 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 ...
2
votes
2answers
2k views

FreeNAS confusion: not sure what happened. raidz1 “DEGRADED”, disk “FAULTED”

Sorry for the long narrative, but I'm thoroughly confused. I'm using FreeNAS-8.0.4-RELEASE-p2-x64 (11367) on a box with 5x3TB SATA disks configured as a raidz volume. A few days ago, the console ...
8
votes
1answer
230 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 ...
1
vote
0answers
25 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 ...
2
votes
1answer
58 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 ...
2
votes
3answers
514 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 ...
11
votes
11answers
6k 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
vote
1answer
118 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: ...
1
vote
1answer
224 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 ...
2
votes
2answers
65 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 ...
5
votes
1answer
237 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 ...
1
vote
1answer
47 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: ...