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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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 ...
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1answer
24 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 ...
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1answer
54 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 ...
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1answer
14 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
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1answer
53 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 ...
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0answers
24 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
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1answer
46 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
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2answers
332 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
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1answer
53 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 ...
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3answers
59 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 ...
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44 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 ...
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2answers
205 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 ...
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0answers
30 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
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1answer
48 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 ...
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1answer
53 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
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0answers
27 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 ...
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1answer
61 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 ...
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0answers
29 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
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1answer
95 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 ...
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2answers
51 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 ...
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2answers
185 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 ...
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0answers
35 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
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1answer
526 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
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1answer
93 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 ...
5
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1answer
161 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, ...
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0answers
22 views

ZFS Backup vs. ZFS Data Folders for Services

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
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1answer
34 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 ...
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2answers
41 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 ...
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1answer
50 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 ...
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1answer
236 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 ...
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1answer
83 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
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1answer
274 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 ...
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1answer
38 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 ...
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1answer
100 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
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1answer
185 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
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1answer
95 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; ...
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0answers
85 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 ...
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2answers
413 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
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1answer
94 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
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2answers
122 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 ...
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0answers
37 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
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0answers
67 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 ...
0
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1answer
124 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 ...
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0answers
55 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
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2answers
117 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
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1answer
239 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 ...
4
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1answer
139 views

ZFS permanent error; options for recovery

Background: small personal server, email, web, shell, etc, for family and friends. SunOS 5.11, snv_113 from November 2008. Server built in 2009. I believe that was either opensolaris or Solaris early ...
3
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0answers
48 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
223 views

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 ...
2
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3answers
235 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 ...