ZFS, which stands for Zettabyte File System, is a combined file system and logical volume manager designed by Sun Microsystems.

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rsync fails/hangs when copying from a Linux ext4 to a FreeBSD ZFS (via SSH)

When I try to copy directories from an ext4 on Linux to a ZFS on FreeBSD (via SSH), rsync immediately fails without copying anything: # rsync -haxHAX /mnt/source/ root@lethe:/mnt/dest/ -vvv opening ...
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what is the structure of meta-object set(MOS) metanode?

I am not very much familiar with ZFS file system. I want to know the structure of meta-object set(MOS) metanode.
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31 views

ZFS groupused value not current

On my Solaris 11 box I have a zfs pool (z) that uses 100G group quotas on each user in /org/users folder. One user had reached their quota and cleaned up their data. The df output, that had previously ...
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26 views

rsync options to transfer big tgz files to zfs filesystem and snapshot later

I need transfer everyday a lot of compressed tar files from a hosting server to a zfs data storage server. The standard way to rsync transfer seems to not zfs snapshot friendly. Each snapshot keep ...
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38 views

I have overwritten mbr, now can not import zpool

The computer I use is my development machine. I use ubuntu and share files with opensolaris using zfs. Somehow I wrote over mbr (from my windows partition using easyBCD!) and now I lost my pool. I ...
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121 views

RAID: ZFS or Btrfs?

I've mounted my own NAS with ArchLinux on an old HDD. I want to add 3x4To to have real storage capabilites and I would like to use a RAID5 system with these 3 disks. I've read a lot about ZFS Raid-z ...
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28 views

Mounting zpool (Solaris server and Freebsd client)

I have a Solaris with ZFS file system and NFS. I am kind of lost on how to export directories from the Solaris OS which has zfs via NFS? That way I can mount them on Freebsd client.
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How do I get systemd to start my ZFS mount script before doing anything else?

Right now I'm using zfsonlinux on Fedora 19, and it works excellently. Mounting works at bootup as planned using the initscript (included with zfs) that systemd calls, but there's a pretty significant ...
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47 views

Accessing Luks-encrypted disc from FreeBSD

I have some data on a ZFS in a machine running FreeBSD that needs evacuation. I have a disc in a USB enclosure with enough space, but it's encrypted using Luks on a machine running Linux. Is there any ...
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1answer
36 views

ZFS pool disappears when adding (enabling) disks to computer

I am adding disks to computer, not to ZFS pool. More spesifically, I disabled other disks, then installed ZFS and created the pool. Now, when I enable the non-pool disks, the ZFS pool disappears. ...
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364 views

Do I need to setup my ZFS (using FreeBSD 10) for foreign-language files (e.g. filenames in Japanese/Thai/etc language)?

I am in the process of setting up a ZFS file server. I am planning to store all sorts of files in it. I have several hundred music tracks that are in Japanese/Korean native character. I want the file ...
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45 views

How to move files from one zfs filesystem to a different zfs filesystem in the same pool?

I have two filesystems in the same zfs pool, /mnt/fs_a and /mnt/fs_b. I want to move about 1TB of data from fs_a to fs_b. But when I: mv /mnt/fs_a/mythtv_recordings /mnt/fs_b/ to my surprise it ...
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1answer
55 views

Seeing much less usable space than expected with new volume using ZFS on Centos 7

I have a monster server I'm provisioning at the minute. There are 15 x 8TB HDD's connected to a SATA interface card that I'm using to create a ZFS volume. The drives are all detected and I've got the ...
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1answer
65 views

Struggling to remove a faulted ZFS pool on Centos 7 using zpool

I have been doing lots of testing of ZFS recently on a new server. I'm ready to move this server into production now, but I'm wondering if I can get rid of my old 'faulted' diskpools before I do, ...
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1answer
55 views

Setting a disk space quota on a samba share residing on an ZFS pool

I have several samba shares, one of which is used for storing some backups. I want to set a disk space quota on said share, as the ZFS volume the share resides on is huge and multi-purpose... I don't ...
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1answer
73 views

Replacing a failed disk in a ZFS pool

I've got a large ZFS disk pool; 3 nested RAIDZ2 vdevs. I am documenting the process for replacing a failed disk for my colleagues and so simulated a disk failure by removing a disk from the host. ...
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20 views

Checking for a failed drive in a ZFS pool

I'm testing a large ZFS pool at the minute and am documenting the process for replacing a failed drive before our environment moves into production. I've built the ZFS volume 'diskpool', which is 3 ...
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78 views

ZFS (on linux) performance issues

I have a server setup with RaidZ2 (8 disks in array) + 2 spares (+ system disk). The disks are 6TB each, 7200 RPM SAS The machine runs Centos7 x86_64 (not a VM), and has 128 GB of RAM and 48 cores ...
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137 views

State of ZFS xattr support in FreeBSD

I'm trying to work out whether or not, or rather to what extend, xattrs are supported in FreeBSD using ZFS. I've read some conflicting information. zfs get xattr lists it as on (default) for /, /usr ...
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77 views

ZFS Mirror on same drive for redundancy?

The device I would like to use as a home server has only a single 2.5'' internal hard drive bay currently fitted with 1TB. The actual data storage (2x 1TB) will be attached to the external USB 3.0 ...
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2answers
156 views

how to one-way mirror an entire zfs pool to another zfs pool

I have one zfs pool containing several zvols and datasets of which some are also nested. All datasets and zvols are periodically snapshotted by zfs-auto-snapshot. All datasets and zvols also have some ...
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2k views

Can't load zfs kernel module on Fedora with Secure Boot - “Required key not available”

I'd like to use zfs with my Fedora 20 system. I've installed the ZFS on Linux Fedora repository and subsequently the kernel-devel and zfs package. As far as I can tell, everything was installed ...
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28 views

Do ZFS zvols on Linux use the arc cache ?

Is the ZFS arc cache used when doing an open() on a zvol device, or only when accessing ZFS datasets ?
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67 views

How replace disks on an existing striped zpool?

I have the following zpool: pool: mypool state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM mypool ONLINE 0 ...
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1answer
172 views

On Gentoo, ZFS stops working after 0.6.5 update

I just updated my Gentoo system, updating my world, including ZFS. Everything but the kernel. I figured I'd do a reboot first, then build a new kernel. Currently, it's running on kernel ...
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93 views

ZFS: Mirror required on backup system?

I plan to backup some of my file systems to a remote server via zfs send. The pool to which I plan to send the backups to is exclusively set up for the backups of my main system. Do I need to have a ...
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1answer
70 views

How to mount /boot from LiveCD (FreeBSD 11 ZFS)

FreeBSD 11 (current) with ZFS I can mount zroot with zpool import -fR /mnt zroot but /mnt/boot is empty (and it's even not a directory) I need to edit loader.conf, how can I do it?
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55 views

Solaris 11 /var used significant space, but I cannot see it on filesystem

I have a mirrored rpool: NAME USED AVAIL REFER MOUNTPOINT rpool 72.1G 1.22G 39.5K /rpool rpool/ROOT 67.9G 1.22G 31K legacy ...
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1answer
75 views

FreeBSD complains “invalid partition table”—still boots

I've recently installed FreeBSD 10 on my Dell Precision M4800 with ZFS as the root file system. The operating system is installed on an mSATA SSD, a 2½″-HDD is installed, too. On startup, the system ...
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2answers
1k views

FreeBSD 10 trace disk activity

Is there any way to find some process which is periodically writing to disk (according to hdd led) on FreeBSD 10 with ZFS (maybe turn ZFS into verbose logging mode)? lsof and other instantly ...
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How to distinguish ZFS pool from mounts?

I'd like to zerofill all free space in partitions inside a FreeBSD virtual machine. The virtual machine contains a 512K boot freebsd-boot type slice (hope I got the terminology right here), followed ...
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43 views

ZFS Snapshots and low space on zpool

I am trying to backup every hour my zvols. I am using zfs for virtual servers on Proxmox VE. I made myself script, which runs snapshot every hour and then send it to offsite backup, then bookmarks ...
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40 views

inconsistency between format and probe-scsi-all outputs

my platform: SPARC T4-1 Generic_150400-24 sun4v sparc sun4v 1 of the disk is seems different in the output of format when I am on console cli even though relevant disk seems same as others in the ...
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1answer
297 views

ZFS disabling sync writes on dataset

I have a freenas box that I use to back ESX VMs to but don't have a SLOG yet and thus speed is poor due to ESX pushing sync writes to the NFS store on my freenas box. If I created a separate ...
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1answer
263 views

Solaris 11.3 upgrade - rpool changes after upgrade disappeared after restart

I have a test server running Solaris 11.2 (on HP Proliant Gen8 Microserver hardware). On October 31st I upgraded the system to Solaris 11.3 as described in Solaris documentation article Updating a ...
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1answer
297 views

Btrfs/ZFS Network Replication

Is it possible to replicate a ZFS or Btrfs raid volume in real-time (or as close to as possible, network specs aside) over a network? ZFF and Btrfs are ideal because of their CoW properties. I'm ...
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6answers
4k views

Read files owned by another user as non-root

I'm backing up servers on a backup server. Each server which is backed up has it's own account on the backup server, and the files are rsynced. It is important that the permissions remain intact ...
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How to make mdstat ignore specified devices

I have a hypervisor with KVM that uses zvols for virtual machine storage. One such virtual machine was moved from a physical one and has software RAID inside it. Zvols are detected as block devices on ...
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1answer
211 views

Why can't I import an ZFS pool without partitioning the data disk with fdisk?

I have a strange situation here, in which I am unable to import an ZFS pool that I brought from another OS UNLESS I fdisk the disk of the pool. I am puzzled as to why this is happening and hoping to ...
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1answer
613 views

ZFS: Trying to remove top-level drive from Zpool

I have a zpool called storage that contains a five device raidz1 array. Today I went and bought another 3TB device and put it in my enclosure. However, instead of creating a new pool and adding that ...
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28 views

Server hardware errors?

I have a large data server running ZFS-on-Linux under Debian 6.0.10, which has been running stably for several years. In the last two weeks, however, it's been crashing every few days and throwing ...
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95 views

Recovering data from a UFS drive with bad superblock

I've got a UFS drive that has a bad superblock. I've used mke2fs to find the alternate superblocks. The drive has a zfs_member on it named "james". How can I mount the drive with the alternate ...
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33 views

zfs dataset constantly unmounting itself after some time, others still available

I have a linux box, that i putty into, which is my backup system. It has a zfs linear span array with 3 2TB drives. Every night i use freefilesync (great program) to sync files to this mount, which ...
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3answers
176 views

Having a host with ZFS system, how to make it available to other hosts on local network?

Having a Linux (RHEL 6) host with ZFS system, how to make it available to other hosts on local network (over LAN or InfiniBand if possible)? what shall be done to ZFS pool to make it sharable? how ...
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453 views

Bulk remove a large directory on a ZFS without traversing it recursively

I want to remove a directory that has large amounts of data on it. This is my backup array, which is a ZFS filesystem, linear span, single pool. The data is in this pool called san, mounted on /san ...
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1answer
88 views

How to turn default Scientific Linux on top of some file system into linux on top of zfs?

So I have a cluster with an array of hard drives (say 6), currently they are not in any RAID, on top of one of them I currently have my Scientific Linux installed and running. How to migrate it onto ...
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46 views

How to install a system on top of ZFS?

I have a clear system with 5 hard drives, bios. No OS installed, no formatting applied to hard drives. I want to install a Scientific linux (6.6 or higher) OS on top of ZFS on it. What are the ...
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1answer
298 views

FreeBSD “Fatal double fault” upon entering ZFS encryption password

I have just installed FreeBSD 10.1 Release i386 on a new computer. I pretty much used the standard installer defaults, except I chose ZFS, RAID-Z1, encryption, and encrypted swap, and I did not ...
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1answer
68 views

How do I test or verify ZFS encryption is working?

How do I test or verify that the ZFS encryption is working, especially when running as a Samba share? Like if I create a ZFS pool with encryption=on, how can I tell whether a file is being properly ...
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808 views

Solaris 11 and zfs, i don't understand space used

This is the situation. Solaris11 virtual machine on VirtualBox as guest. Virtual disk is 55GB df report Filesystem Size Used Available Capacity Mounted on rpool/ROOT/solaris-8 55G ...