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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1answer
484 views

FreeNAS: Renaming a zpool

Now that our server is set up, I would like to rename our zpools. I read somewhere that the way to do this is export & re-import under the new name. But will all my mount points and shares remain ...
2
votes
2answers
1k views

Can I move a ZFS pool to another computer?

I have an EasyStore NAS running Ubuntu, and I want to replace the disks. I want to add the ZFS kernel modules and create a ZFS RAIDZ pool. Due to space constraints, I have to move the data to the new ...
2
votes
1answer
423 views

Why is MySQL unable to open hosts.allow/hosts.deny?

I have a storage server running Nexenta (OpenSolaris kernel, Ubuntu userspace) with MySQL on top of a ZFS storage array, using innodb_file_per_table and ulimit -n set to 8K. mysqltuner.pl confirms ...
-2
votes
1answer
242 views

Move data to a new zpool [closed]

I want to create a new Zpool and move data from an old zpool The old zpool is like this: rpool [mirror-0 (c1t0d0s0 c1t1d0s0) ] I will insert two new hard drives and want to configure a new ...
1
vote
2answers
904 views

ZFS/Btrfs/LVM2-like storage with advanced features on Linux? [closed]

I have 3 identical internal 7200 RPM SATA hard disk drives on a Linux machine. I'm looking for a storage set-up that will give me all of this: Different data sets (filesystems or subtrees) can have ...
1
vote
2answers
357 views

How to check that all ZFS snapshots within a pool are without holds before destroying that pool

Question Already I can check each snapshot of a filesystem individually, manually. I would prefer to check all at once (all with a single command or script). Please: can that be done with a ...
5
votes
3answers
453 views

What is the ZFS ACL limit?

Does anyone know how many user ACL's ZFS can handle? With other words: for how many users can I set ACL's like this one for the same directory? setfacl -m user:test1:rwxpDdaARWcCos:fd----:allow ...
1
vote
0answers
235 views

Freenas - Expanding volume

We currently have a server with 5x3TB disks configured as a RAIDZ: zpool status pool: raid-5x3 state: ONLINE scrub: none requested config: NAME STATE ...
3
votes
2answers
4k views

Non-ECC memory with ZFS: a stupid idea?

I have a new server and am planning to upgrade the paltry 2 GB of memory to the maximum of 16 GB. (Theoretically 8 GB is the limit, but empirically 16 GB has been shown to work.) Some guides advise ...
0
votes
1answer
716 views

Write access from a Windows client via a ZFS SMB, to a file created on the host in OpenIndiana

I've got an OpenIndiana server running ZFS that is shared using a nobody user and group. I don't fully understand Solaris ACL permissions, but I do know Linux style permissions. The client is Windows ...
0
votes
1answer
537 views

zfs pool error, how to determine which drive failed in the past

I had been copying data from my pool so that I could rebuild it with a different version so that I could go away from solaris 11 and to one that is portable between freebsd/openindia etc. it was ...
0
votes
1answer
327 views

How to find maximal value for “zfs set quota” without changing quota?

How do I find out how far I can go extending the quota on a ZFS file system (Solaris 10)? I was told to set zfs set quota=none and then set it back to the original value, but I'm not allowed to do it. ...
4
votes
1answer
2k views

How to NFSv4 share a ZFS file system on FreeBSD?

Using FreeBSD 9, and created a ZFS file system like so zfs create tank/project1 zfs set sharenfs=on tank/project1 There are many howto's on setting up NFSv3 on FreeBSD on the net, but I can't find ...
2
votes
2answers
314 views

recursively mounting ZFS filesystems?

I'm aware this more of a beginners question, but manpages, google and FreeBSD Handbook provided no solution. I'm using ZFS Version 28 on a 8.2 Stable FreeBSD and my problem is the following: When I ...
1
vote
0answers
190 views

Solaris x86 11.1 and qlt driver — only 3/4 ports attach

I'm using the QLogic QLE2564 4-port 8Gb HBA. The problem I have is that when I attach the qlt target mode driver to the card, only 3/4 ports attach the driver. ffffc10006854e58 pciex1077,2532, ...
3
votes
1answer
437 views

Does NFSv3 respect ZFS ACL's?

NFSv3 of course doesn't support ZFS ACL's, but what will happen if I have the following setup?: +-----------------------------------------+ +-------------+ | FreeBSD ZFS serv1 ...
2
votes
1answer
176 views

Why is ZFS replication single threaded?

On my 8 core NAS I see only one core maxed out when ZFS replication over SSH is running. I would expect that transferring a snapshot would scale perfectly with the number or cores, as the snapshot ...
1
vote
2answers
332 views

How to configure HA iSCSI for Solaris 10

BACKGROUND: We have a StarWind NAS that we are currently using for High Availability storage with our Windows network. Starwind has mirrored drives and multiple ip paths, that the Windows Server ...
3
votes
1answer
121 views

Migrating ZFS from using partitions to using the entire disk

I have a simple ZFS setup that I've been running for a few years now. When I originally set it up, I created a number of partitions and created a zpool from a partition on each of my two drives, and ...
2
votes
2answers
859 views

can I consolidate a multi-disk zfs zpool to a single (larger) disk?

I have this zpool: bash-3.2# zpool status dpool pool: dpool state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM ...
1
vote
1answer
186 views

Pool + ZFS Folder size not matching in OpenIndiana & Napp-IT

I created a 59.7TB Pool with 8x RAIDZ2, 8x RAIDZ2, 6x RAIDZ2, 2x Spare (3TB HD) The pool shows up at 59.7TB. This is exactly what I expected. Then I go to create a ZFS Folder and it says I only have ...
2
votes
1answer
207 views

smartOS HPC config suggestion

I'm configuring a brand new HPC server and am interested in using SmartOS because of it's virtualization control and zfs features. Does this configuration make sense for a SmartOS HPC, or would you ...
-3
votes
2answers
610 views

How much overhead does ZFS have? [closed]

Adding a file system to a raw device of course takes up some overhead. The question is how many percent does ZFS take? And does overhead differ depending on the ZFS raid set? Update The purpose is ...
0
votes
2answers
68 views

ZFS terminology: does 'root file system' accurately describe the file system at the root of a pool?

I began using the expression root file system. Recently in search engines I see, that three-word expression has different interpretations in relation to ZFS. To avoid future misunderstandings: ...
4
votes
1answer
827 views

mdadm+zfs vs mdadm+lvm

This may be a naive question since I'm new to this and I cannot find any results about mdadm+zfs, but after some testing it seems it might work: The use case is a server with RAID6 for some data that ...
2
votes
0answers
217 views

Can't remove zfs log device from pool

I run a FreeBSD 9.0 server with ZFS pool version 28 and ZFS version 5. I had two pools with a log on ssd's two partitions. These pools was created on FreeBSD 8.2 with ZFS pool version 15, and ZFS ...
2
votes
2answers
552 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 ...
12
votes
1answer
393 views

Technical details for Server 2012 de-duplication feature

Now that Windows Server 2012 comes with de-duplication features for NTFS volumes I am having a hard time finding technical details about it. I can deduce from the TechNet documentation that the ...
-1
votes
1answer
183 views

ZFS Configuration advice

I need some advice on configuring ZFS. Here is what I have: Physical Disks: 4x 3 TB 2x 2 TB 2x 1 TB What is the best configuration for my Vdevs and storage pool. I want to maximaze space but ...
8
votes
1answer
529 views

How do you create large, growable, shared filesystems on Linux at AWS?

What are acceptable/reasonable/best ways to provide large, growable, shared storage at AWS, exposed as a single filesystem? We're currently making 1TB EBS volumes ~biweekly and NFS exporting with ...
1
vote
1answer
245 views

Can I recover a zpool after it's been exported, given that devices have not been reallocated?

I had a zpool we'll call 'testpool'. testpool had 3 devices included in it, and a single zfs called 'test'. I needed to move 'test' to a new, smaller pool. I wanted to name the new pool the same ...
1
vote
1answer
729 views

Solaris 10: How to remove devices from a zpool with /usr currently mounted?

I use Solaris 10 on SPARC. I have /usr legacy mounted on a zpool 'usr-pool'. I now need to move some of the devices in usr-pool to another zpool which is running out of room. What is the safest way ...
2
votes
3answers
824 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 ...
0
votes
1answer
124 views

Zpool list showing blank values

My problem is that when I call zpool list it gives this blank output.... NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT - - - - - - - - However a zfs ...
1
vote
1answer
722 views

Zfs Drive config on FreeNas

Couple of related questions. Background: I have a stock of drives lying about that I want to use in a HP Proliant Microserver which has a 4 slot SAS cage with FreeNas. I don't want to spend any more ...
0
votes
1answer
504 views

ZFS Pool (Raidz2) of 23 disks + 1 spare. Good/Bad? [closed]

I'm creating ONE Raidz2 Pool with 23 drives and a hot spare. (I know the hot spare isn't fully supported yet but thats fine) Is it a bad idea to use this many disks in a single pool? What would the ...
1
vote
1answer
89 views

ZFS dedup block usage?

How can I list all the ZFS dedup blocks and the files that are associated with each one? e.g.: BLOCK FILES e6b678a /pool/a/file1 /pool/a/file2 If that's not possible, what about ...
7
votes
1answer
452 views

Why did my zpool replace never finish and what should I do now?

I have a ZFS zpool with two disks in a mirror configuration, da0 and da1. da1 failed, and so I replaced it with da2 using zpool replace BearCow da1 da2 This ran for a few hours, during which zpool ...
1
vote
0answers
159 views

Ubuntu 12.04 transmission-daemon and zfsonlinux: bad file descriptor and corrupt pieces

I'm running a Ubuntu 12.04 with zfsonlinux and transmission-daemon. The issues: sporadic Bad File Descriptor and Piece #xxx is corrupt errors. After I recheck the torrent, everything seems fine. That ...
-4
votes
2answers
155 views

file system that allow to specify different RAID level per directory and change it afterward [closed]

I have 5 hard drives, where I want to keep my data. Some of my files are more important, and some of them are less. So some of them I wish to put on RAID-6, and for some it RAID-5 is sufficient. It is ...
0
votes
2answers
528 views

zfs mix raid levels in one pool

I've read that "It is not recommended that RAID types be mixed in a pool", which implies that it is possible. Why is it not recommended? It would be very desirable in my setup, which consists of a ...
1
vote
2answers
626 views

Has anybody tried to create a really big storage with ZFS and plain SAS controllers? [closed]

I'm considering to build one with something like this: http://www.supermicro.com/products/chassis/4U/847/SC847E26-R1400U.cfm (a chasis with two dual port multipath expanders) ...
1
vote
0answers
106 views

Accidentally resilvered 2 drives

We had 2 failed drives in our ZFS raidz1 pool. One had been resilvered to a spare and another was just out. The pool was in degraded mode. I replaced both drives and began the resilver on the ...
7
votes
3answers
664 views

How ZFS handles online replacement in a RAID-Z (theoretical)

This is a somewhat theoretical question about ZFS and RAID-Z. I'll use a three disk single-parity array as an example for clarity, but the problem can be extended to any number of disks and any ...
11
votes
1answer
6k views

For L2ARC and ZIL: is it better to have one large SSD for both, or two smaller SSDs?

Main references ZFS L2ARC (Brendan Gregg) (2008-07-22) and ZFS and the Hybrid Storage Concept (Anatol Studler's Blog) (2008-11-11) include the following diagram: Question Should I interpret the ...
2
votes
3answers
658 views

ZPOOL Mirror setup

What is the best setup for an zpool intended for database big inserts or TCP/IP dumps (i mean sustained high write throughput using 4 disks ? I want buy 4 Wd RE4 2TB drives and get the more power i ...
2
votes
1answer
548 views

How best to integrate PPA into Debian?

I'm working with ZFS on Linux, on my Debian squeeze server. I've found a useful package in an Ubuntu PPA, apparently by one of the ZoL developers, and I would like to integrate it into my package ...
0
votes
1answer
672 views

ZFS SSD Trim and Software Raid 5

I am trying to find if the ZFS filesystem has added support for Trim to Raid 5? I am setting up an SSD array in Raid 5. I also would like to know if there is any good software raid 5 alternatives to ...
1
vote
1answer
178 views

ZFS for offline backups

I'm thinking of using ZFS to backups files to single drives that are going to be kept mostly offline. Does anyone know if the FreeBSD ZFS implementation still uses memory if a dedupped pool is ...
0
votes
1answer
2k views

NAS4Free disk encryption and ZFS error

I have installed a NAS4Free on a VM, and as recommended, I installed it on a 1GB virtual disk, and assigned another disk 500GB to this VM for file storage. I have created the disk, encrypted it, ...