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

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186 views

How to mount external ZFS file system without clobbering/altering current or external filesystem

I am using FreeBSD 10.2 using ZFS on root as the file system (zroot01). I have an external hard disk with a ZFS file system from another FreeBSD 10.2 system (zroot02) that I want to temporarily mount,...
4
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1answer
36 views

100% CPU utilisation and hang after virsh migrate

I've been experimenting with ZFS + DRBD + live migration (I want to understand it well enough to write my own automation scripts before I start playing with ganeti again, and then openstack cinder). ...
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50 views

BTRFS send only new files without deleting anything on remote

I'm looking into replacing rsync with BTRFS tools, but I'm not sure if what I want to do is even possible. I have a small local volume and a large remote volume used for archiving. Files will be ...
3
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2answers
45 views

ZFS messed mirrors up

I have a ZFS pool with 6 drives in RAID10, well it use to... I tried to upgrade a 146GB drive to 1TB drive, and messed up bad root@x7550:~# zpool status pool: stuffpool state: ONLINE scan: ...
3
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2answers
59 views

How to remove device from pool

I did a mistake when I added a new device in my raidz pool thinking ZFS should do it automatically. :~# zpool status pool: data state: ONLINE scan: resilvered 78,3G in 2h4m with 0 errors on ...
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2answers
73 views

ZFS: send / receive with rolling snapshots

My small home server runs on a distribution featuring ZFS. On that system, I implemented a rolling snapshot scheme: every hour, a snapshot is created once a day, the chain is thinned so that I have ...
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78 views

Forcing zpool to use /dev/disk/by-id in Ubuntu Xenial

I'm giving the bundled OpenZFS on Ubuntu 16.04 Xenial a try. When creating pools, I always reference drives by their serials in /dev/disk/by-id/ (or /dev/disk/gpt on FreeBSD) for resiliency. Drives ...
1
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1answer
43 views

Why doesn't zfs list output the real size of a snapshot?

So I am running low on space on a zfs based backup server and deleted some old backups, but the space on the filesystem wasn't freeing up afterwards. First guess? There must be some old snapshots ...
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1answer
43 views

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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2answers
84 views

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.
0
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1answer
33 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 ...
4
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202 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 ...
1
vote
1answer
35 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.
3
votes
1answer
87 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 ...
0
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1answer
53 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. ...
3
votes
1answer
107 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 ...
0
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1answer
103 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, ...
2
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1answer
92 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 ...
2
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1answer
34 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 ...
0
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1answer
163 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. ...
0
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1answer
22 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 ...
2
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1answer
59 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 ...
2
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0answers
112 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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203 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 ...
3
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2answers
467 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 ...
0
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1answer
31 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 ?
1
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1answer
92 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 ...
3
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1answer
220 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 3.17.8-gentoo-...
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2answers
106 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 ...
2
votes
1answer
93 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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104 views

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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57 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 ...
0
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1answer
73 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 rpool/...
0
votes
1answer
45 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 ...
2
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1answer
82 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?
2
votes
1answer
319 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 ...
2
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1answer
349 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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12 views

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 ...
3
votes
1answer
407 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 ...
1
vote
1answer
242 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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0answers
33 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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0answers
120 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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vote
3answers
315 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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0answers
35 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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0answers
51 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 ...
3
votes
3answers
578 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 ...
0
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1answer
93 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 ...
1
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1answer
324 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 ...
0
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1answer
70 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 ...
3
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3answers
1k 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 ...