ZFS is a modern file system and volume manager originally developed by Sun Microsystems and licensed under the CDDL. It is a copy-on-write file system with support for large storage arrays, protection against corruption, snapshots, clones, compression, deduplication and NFSv4 ACLs. An open-source ...

learn more… | top users | synonyms

3
votes
1answer
184 views

Ubuntu 14.04 blk_update_request I/O error on same sector across all drives with ZFS

I'm running Ubuntu 14.04 with ZOL version v0.6.5.4: root@box ~# dmesg | egrep "SPL|ZFS" [ 34.430404] SPL: Loaded module v0.6.5.4-1~trusty [ 34.475743] ZFS: Loaded module v0.6.5.4-1~trusty, ZFS ...
2
votes
1answer
77 views

ZFS send/recv on Ubuntu Server 14 - Oh, where did my data go?

I've been trying to figure out a method to replicate snapshots created by zfs-auto-snap from our primary data center to a remote server, both running Ubuntu Server 14 with the latest ZFS-FUSE. Here's ...
1
vote
2answers
222 views

What kind of ACL storage to use for a Samba domain controller on ZFS and FreeBSD

I want to set up a Samba domain controller on a FreeBSD hosts that uses ZFS for file storage. When I try to run samba-tool domain provision as documented on the Samba Wiki article on setting up a ...
1
vote
1answer
32 views

zpool vdevs previously mirrored, now non-mirrored, unable to re-mirror

On FreeBSD 10.2-RELEASE, I had the following setup on a dev (luckily) environment until yesterday: NAME STATE READ WRITE CKSUM bigpool ...
1
vote
3answers
163 views

How can I determine the performance penalty of VT-d vs. baremetal?

I am looking to configure my server in a slight odd way to create a private cloud setup. I have to take the HBA that my storage disks are tied to and pass it into a VM (probably xen) to allow the ...
-1
votes
1answer
40 views

ZFS in JBOD mode - coping with single drive failure

I want to run ZFS on my small office server. The server is on a tight budget and I have to make do with the hardware (drives) I got, meaning they are all of different size and model. What I want is ...
0
votes
1answer
144 views

ZFS: i/o error - all block copies unavailable

I am trying to install FreeBSD Sparc64 on my SunFire440 machine, I followed the tutorials to Install FreeBSD Root on ZFS using this tutorial link. Only the changes I made is that instead of using ...
-2
votes
1answer
21 views

OpenSolaris/OpenIndiana drive full, cannot boot

While downloading my drive became full and now it is non booting. I installed a new drive in the workstation then installed exactly the same OS. I am now trying to go about a simple way of ...
3
votes
1answer
116 views

Broken ACLs when “zfs send”ing a snapshot from a Linux machine to Solaris

I'm running ZFS on a Ubuntu machine that hosts our home directories. The pool has the following ACL setting: # zfs get all homes | grep acl homes aclinherit restricted default ...
0
votes
0answers
41 views

Wrong permission when accessing ZFS snapshot over NFS (Solaris server, Ubuntu client)

TL;DR: I don't understand why I can access one file but not an other (in the same directory), although they appear to have identical permissions. I have an NFS server running Solaris 10 10/08 and a ...
3
votes
1answer
71 views

recover data from zfs pool on napp-it openIndiana [closed]

I just inherited a desktop PC with napp-it free (openIndiana), it was set up to work as a sort of NAS, it had two disks on 2TB and one 3TB without any redundancy, one of the drives failed and the pool ...
3
votes
2answers
456 views

ZFS 100TB hardware setup

We received a quote for the following server setup : Intel Xeon E5-2609V2 2 x WD RE 2TB SATA III 34 x WD RE 4TB SAS II 32 GB memory (ECC) LSI MegaRAID 9271-8i bulk, 8 x SATA III/SAS II internal ...
6
votes
1answer
66 views

ZFS keeps faulting the same device

Our storage server has some problems, just ago we had a broken disk (WD 4TB RE SAS), though the raidcontroller (LSI MegaRAID 9271-8i) kept the disk online (status : ok). Only Media error showed 1 ...
3
votes
3answers
237 views

Weird ZFS performance with 4K pool block size?

I'm starting to look at ZFS, doing tests with FreeNAS on an old HP MicroServer (N40L). Didn't get extra RAM yet so it's only running with 2 GB, so pretty much no cache. I created a pool on a single 1 ...
0
votes
0answers
116 views

Xenserver 6.5 (Open Source) VDI per ISCSI LUN (ZFS ZVOL)

In Xenserver 6.5 (open source edition) I want to create VMs with VDIs that are actually iSCSI LUNs shared by a CentOS 7 SAN which are in fact ZFS ZVOLS (the last part should not matter). My problem ...
1
vote
2answers
277 views

zpool forgot all data devices of a pool: how to bring them online again?

My Debian server is running ZFS on Linux. Today I had to reboot it two times due to software upgrades. A first reboot because of ZFS update from some 0.6.4-1.2-1-wheezy to 0.6.5.2-2-wheezy, which went ...
2
votes
0answers
99 views

Expanding JBOD with SAS extenders

My project is expanding 24-HDD ZFS box by adding 45-drive box with option to add another 45-drive box later (all are JBODs). Host box (24 HDDs) is Supermicro with single port expander backplane and ...
1
vote
1answer
152 views

Access iSCSI block device, setup as ZFS volume on CentOS7 - won't automount on boot, hangs on reboot

I am running CentOS7 on a virtual instance at Softlayer. There is a block storage device available to the instance via multipath/iscsi I have successfully had this block device mounted as XFS. I ...
1
vote
1answer
114 views

ZFS on a single external HDD drive: setup / tutorial and workflow [closed]

There are many tutorials on ZFS but I couldn't find a single one which covers the changes in commands when one uses only a single drive. I know by now that the parameter copies=2 is used but what ...
2
votes
0answers
38 views

Grow ZFS pool to use the whole disk

What's the (if there's any) way to grow a zfs pool that only uses a disk partially to use the whole disk? Background is, zfs is used here on a virtual machine and the Virtual machines disk has been ...
0
votes
1answer
88 views

How do I prevent ntfs-3g use starving my ZFS ARC of memory?

I have an HP Microserver running OpenMediaVault 2.1.18 (Stone burner), based on Debian GNU/Linux 7 (wheezy). A few days ago, I needed to copy a large number of files from a USB drive, formatted with ...
0
votes
0answers
33 views

ZFS and controller level mirroring

If there are more than one SCSI controllers on your machine - there are disks from each controller - is there an option within ZFS to create a mirror of an existing pool so that sub mirror is picked ...
3
votes
1answer
169 views

ZFS Performance 80% rule

Does the 80% capacity rule of thumb for ZFS pools apply regardless of the size of the pool? If I have a pool of 10TB, that means I have to keep 2TB free. Fair enough, the loss isn't too great. But in ...
1
vote
2answers
84 views

Does the max-80%-use target suggested for ZFS for performance reasons apply to SSD-backed pools?

The Solaris ZFS Best Practices Guide recommends keeping ZFS pool utilization below 80% for best performance: Keep pool space under 80% utilization to maintain pool performance. Currently, pool ...
3
votes
2answers
1k views

ZFS Datasets dissappear on reboot

I have installed ZFS(0.6.5) in my Centos 7 and I have also created a zpool, everything works fine apart from the fact that my datasets disappear on reboot. I have been trying to debug this issue with ...
0
votes
0answers
41 views

Destroying zfs dataset, migrating data to parent dataset

I have these zfs datasets: pool1 pool1/ds_parent pool1/ds_parent/ds1 pool1/ds_parent/ds2 pool1/ds_other I want to keep all data which is now contained in the datasets ds1 and ds2, but I don't want ...
1
vote
1answer
2k views

How to migrate a regular LXC container to a Proxmox LXC container?

How do you migrate a regular LXC container (from another or the same server) to a Proxmox LXC container, which can be accessed via the Proxmox web GUI? For example, I have a container created by ...
2
votes
1answer
229 views

ZFS pool slow sequential read

I have a related question about this problem, but it got too complicated and too big, so I decided I should split up the issue into NFS and local issues. I have also tried asking about this on the zfs-...
7
votes
1answer
223 views

Extreme ZFS slowdowns after several months

I've got a general-purpose server, providing mail, DNS, web, databases, and some other services for a number of users. It's got a Xeon E3-1275 at 3.40 GHz, 16 GB ECC RAM. Running Linux kernel 4.2.3, ...
1
vote
1answer
46 views

ZFS Backup vs. ZFS Data Folders for Services [closed]

So I recently set up my own little server here at home. I got my main system set up on an SSD and a ZFS pool of larger HDDs for data storage. Now the question I was asking myself was if for services ...
2
votes
1answer
40 views

Why are some disks and some are LUNs?

Question at the bottom. I would like to use a Sun StorageTek 6100 as JBOD for ZFS, and so I have connected it to OmniOS over FC with a QLC2462 HBA. The disk array doesn't have a controller tray, just ...
1
vote
2answers
64 views

existing zpool assigned disk from datastore how to increase the zpool and increase the file system

First disk c1t0d0 is in syspool which is root file system. This disk is from datastore from esx host. If they increase existing disk for this Solaris VM server of syspool disk c1t0d0. How do I ...
-1
votes
1answer
70 views

Increase the capacity of a RAIDZ1 vdev on ZFS

I'm running FreeNAS on a Mini-ITX Box at home. I have 3x3TB HDDs in a RAIDZ1 udev. Now I'm running out of space. I have space for one additional HDD in my case. I want to convert the 3x3TB RAIDZ1 into ...
-1
votes
1answer
373 views

Ubuntu + ZFS vs Rockstor [closed]

I have a personal fileserver at home with 6 HDs: 1 500 GB one for the OS 1 4 TB one for temporary data four 2 TB ones that we want to configure in some sort of RAID 5 fashion It looks like I have ...
1
vote
1answer
148 views

“Reinstall” FreeBSD using ZFS snapshots

I am using a dedicated server, and unlike on VPS providers or VM machines, getting back to a clean state (untouched, after install) is quite a laborious thing to do (lots of clicking around in a web ...
0
votes
1answer
505 views

Greyed out Folder in Finder (OSX) on Network SMB Share

Bear with me, this is long and complicated, but TL;DR Where does OSX hide extra attributes on files (either on shares or local)? We are having issues in our Enterprise environment. We have an Oracle ...
-1
votes
1answer
48 views

Removing all hw raid from Sun server

This post is about the same server as this post, where multiple disks were in a LUN, and then ZFS was used to make the ZFS pools. I would like to use the 6140 disk arrays as JBOD's on either Linux or ...
-3
votes
1answer
127 views

How stable and reliable is HAMMER in 2015? [closed]

It's been a long time since HAMMER came about. Has it been deemed reliable for general-purpose consumption yet?
2
votes
2answers
360 views

rsnapshot vs zfs / btrfs snapshots

Currently I'm using rsnapshot to implement a daily / weekly / monthly backup scheme on an external disk. Lately I've been reading alot about copy-on-write file systems like zfs and btrfs. I quite like ...
2
votes
1answer
162 views

iSCSI: lsscsi lists device but fdisk does not

How do I make freebsd show initiators a mountable target from a zpool? On a fresh install of FreeBSD 10.2 (hostname bohr) I made a zpool named tank with a single vdev which is 2 disks in a mirror; ...
1
vote
0answers
107 views

Missing free space in new zfs raidz2 zpool?

I'm running Nas4Free 10.2.0.2 - Prester (revision 1814) which is based on FreeBSD 10.2-RELEASE-p2 #0 r287260M: Fri Aug 28 18:38:18 CEST 2015. System has 24 GB memory. I've tried with ashift=9 and 12 ...
1
vote
2answers
1k views

ZFS on enterprise RAID pass-through, and ZFS on FreeBSD root

We've been running ZFS on top of a single hardware RAID on dell poweredge for years. I know most people are against this, but the snapshot/clone, compression and flexible partition of ZFS served us ...
1
vote
1answer
185 views

ZFS snapshot send incremental

I have been happily using zfsnap with CentOS and ZFSonLinux in a scripted manner similar to how it is described on the web site, but have run into an issue. Unfortunately backups did not run a few ...
2
votes
2answers
173 views

Multiple RAID types on a ZFS pool

Reading the Ubuntu Wiki page on ZFS (https://wiki.ubuntu.com/ZFS) I found some claimed abilities of ZFS which I am not able to find any documentation of. If the claims are infact possible I would love ...
1
vote
0answers
43 views

ZFS SAN boot - what makes the OS crash during SAN switch change

I have a Solaris 10 server - with ZFS SAN boot - the OS pool has disks configured from two different HBAs c1 , c2 - have LUNs from different FA ports on the SAN array - c1 , c2 HBAs are connected ...
2
votes
0answers
81 views

ZFS - zfs destroy snapshot during zfs send incremental

How does zfs handle destroying snapshots during an incremental send? Example: 2 servers using ZFS: zfshost1 [root@zfshost1~]# zfs list -t snapshot NAME zones/40e66d56-4ea8-11e5-885d-feff819cdc9f@...
0
votes
1answer
192 views

Missing free space from ZFS pool after migrating from FreeBSD to NAS4Free

I was running FreeBSD 10.0-RELEASE-p4 and migrated to NAS4Free which is FreeBSD version 10.2-RELEASE #0 r286738M: Thu Aug 13 21:32:58 CEST 2015. Now I'm missing free space and I can't delete any files ...
0
votes
0answers
112 views

Solaris 10 Update 8, ZFS boot/root zpool and moving disks around

One of my OLD machines is running solaris 10 Update 8 (x86). It has a mirrored ZFS I use for "root zpool". Both disks are failing so I plugged a new disk in a USB port and attached the new disk to ...
3
votes
2answers
161 views

'zfs get all' returns properties for file systems with '%' (percent sign) appended

While working with zfs I saw that 'zfs get all' for some existing file systems would list properties with '%' (percent sign) added to the the name of the file system. Like so: # zfs list ... ...
6
votes
1answer
336 views

zfs checksum error in raidz1 vdev but not in disk

I am backing up data stored in a zpool consisting of a single raidz vdev with 2 hard disks. During this operation, I got checksum errors, and now the status looks as follows: pool: tmp_zpool state:...