An advanced file system that can span multiple disks, heal itself from data corruption, deduplicate data, encrypt, etc.

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Adding a parity drive to a RAID-Z1 array

Can I create an array as a RAID-Z1 and then later add another pairity drive to make it into a RAID-Z2? I’ve got 4TB of data on a drive I’d like to add into an array that I’m building out of fresh ...
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26 views

managing zfs + mirroring

I've noticed that guides on zfs+redundancy+performance tend to emphasise mirroring as a good option, but zfs administration information tends to provide relatively little information on managing a ...
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23 views

ZFS writes a lot to my disk

I'm trying to figure out why my ZFS disks are written to so much. Using nmon and zfs iostat, I can see heavy writing activity (around 10M), but with iotop I see only a few bytes written. On this ...
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16 views

Performance impact of SATA II over SATA III for ZFS?

I have a bunch of WD RE4 disks I got from a place that I worked. The drives are 3Gbps SATA II interface. I was going to use them in a server I am building for myself to act as a NAS / SAN for my ...
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112 views

How many drives do I need for ZFS RAID-Z2?

How much storage would I need if I wanted to use RAID-Z2? I am building a home server that will run FreeNAS with a ZFS file system, and currently plan to install 3 3TB hard drives. Does RAID-Z2 ...
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27 views

Weird speed measurement of ZFS over AFP file copy

I've been checking how fast is my ZFS storage server. I have some big files (>30 GB) and I've been using dd piped to /dev/null to check read speed. When running dd for a specific file for a first ...
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36 views

zpool import order in /dev/disk/by-id

If I have a disk: sdi, and there are three entries of it in /dev/disk/by-id: scsi-SATA_WDC_WD6001FSYZ-_WD-WXB1HB4SFS7W -> ../../sdi ata-WDC_WD6001FSYZ-01SS7B0_WD-WXB1HB4SFS7W -> ../../sdi ...
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67 views

Can zfs/zpool be setup in an LVM formatted disk

I have Ubuntu 14.04 setup with LVM on a 500GB disk on my laptop. I want to setup/playaround with zfs/zpool. What is the best approach for this without losing my data
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102 views

testing ZFS - how to destroy an UNAVAIL pool without reboot

I am testing ZFSonLinux and i have an experimental pool named usbcka. There is only testing data. I am simulating HW failure to deterimine behaviour in this scenario. I know this setup has no ...
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69 views

Is a RAID1 (mirror) with 2 x 4TB drives and ZFS (through freenas) okay?

I'm looking to create a freenas RAID1 using two 4TB drives. It's going to be my primary location for a generic backup location (use rsnapshot for local files and keeping computer dd'd images) and ...
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124 views

What easy to manage file system to choose on Linux for homeserver?

I have a homeserver running on a HP Proliant Microserver Gen7 with 10GB of ECC Memory running Debian 8 (jessie). Right now i have one small system disk (backed up using rsnapshot) and 2x 3TB storage ...
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102 views

Which filesystem to use for hosting virtual machines?

Goal A reliable server configuration which serves as the off-site backup for several, distributed servers as well as hosting a few virtual machines. Each server's backups should be encrypted, ...
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51 views

zfs send stream much bigger than predicted by “dry run”

Im running daily offsite backups of my ZFS system using incremental zfs send directed through ssh using buffer to buffer the stream and monitor its progress. I can estimate the size of the transfer ...
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66 views

Import zpool with one unknown missing vdev_children.

My raid-z zpool was in degraded mode, I have added a new disk in the zpool with the command: zpool add -f uhuru-test da3 The problem is that da3 have been accidentaly erased and now uhuru-test ...
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25 views

ZFS file system: Can I split data or compress files w/o formatting the disk? [closed]

Is ZFS file system able to split data or compress files without formatting any disk?
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395 views

What is the best way to setup separate FreeNAS jails/plugins using separate datasets?

I am running FreeNAS-9.3-STABLE-201512121950 from a USB stick in VirtualBox on a Mac Mini Server (late 2012 - Macmini6,2) running OS X El Capitan. Quad-core i7, 16G RAM, with 8G and 2 procs devoted ...
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84 views

zfs change device path

i have 2 zfs-fuse pools running on three external usb drives, since they are usb drives they will have different names when they are pluged in. zfs status -x is listing the pools and the devices as ...
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66 views

ZFS as JBOD with removable drives?

Is it possible to set up a ZFS pool such that it looks something like JBOD but drives are removable from that pool? I have read that, with the usual ZFS configurations, this isn't possible. It seems ...
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218 views

FreeNas single disk ZFS Pool Volume no longer mounts, HDD is 100% SMART ok, need help recovering data

I'm facing a huge issue with a small NAS i have at work. I've made the NAS a few months back as a test, but since then it's full of important data, a lot of which not backed up anywhere else. This ...
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399 views

Will FreeNAS/ZFS let me manage my storage this way

I'm considering FreeNAS; and want to confirm that my understanding of what I can/can't do with storage in it is correct beforehand. Initial build out: 1 storage pool with 2 x 6TB drives mirroring ...
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72 views

Grub2 support for ZFS

I have installed PCBSD on my machine with Ubuntu on it with the intension of dual booting. However, the grub install during the installation fails. I would like to set up a custom grub script to load ...
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468 views

zpool import with missing cache device

Was going to try SmartOS, partially because I was not satisfied with FreeNAS for my usage. Created new zpool on old cache drive for SmartOS zones. That was all just backstory. The point is that now ...
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348 views

How important is the 1GB RAM per 1TB disk space rule for ZFS?

I'm planning on building my first NAS box and currently I'm considering FreeNAS and ZFS for it. I read up on ZFS and it's feature set sounds interesting, although I will probably only use a fraction ...
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119 views

Why does ZFS slow down making large files after 2.4 gig?

Zfs on linux, I'm making a large tar file, I'm watching it add to the file, and it goes very quickly, until it hits 2.4gig in size, then it just crawls, for hours. The same file on ext4 has no ...
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139 views

Restore ZFS pool after creating over it

I reinstalled my Ubuntu 14.04 system and tried to mount my existing zfs drive. It's a single drive with all data on it. The OS is on a different drive, the zfs drive only holds data. The pool name is ...
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79 views

Does ZFS make sense as local storage?

I was reading about ZFS and for a moment thought of using it in my computer, but than reading about its memory requirements I thought twice. Does it make sense to use ZFS as local storage or this ...
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160 views

Is pushing zfs backup to tape for long term redundancy efficient?

Its quite expensive to move to tape, so for my setup, would it be efficient? Im looking for suggestions for efficiency towards either just building up my existing backup (SAN), and documenting it for ...
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211 views

Proper rsync flags for backuping from ext4 to ZFS

I have a home server running Ubuntu 14.04.3 LTS with an ext4 file system, to which I regularly backup data from various devices. Now I have set-up an external USB HDD with ZFS file system and would ...
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96 views

ZFS not writing continuously to array

Preface: I'm by no means an expert Linux user, but I've played with Linux enough to be dangerous. I'm building a personal server, basically just to use as storage for video and photos. Current specs ...
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3answers
181 views

How to rollback a specific directory in ZFS snapshot?

Is it possible to rollback to a certain directory within a snapshot? For example, given the snapshot tank/home@snapshot_week_01 can I rollback to something like tank/home/louis@snapshot_week_01 ...
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44 views

OpenZFS ACLs on OSX

I mistakenly did a chmod ug+rwX rather than chmod ug=rwX and have now gained a host of ACLs on the folder and I cannot get rid of them. It is really screwing things up with shared use and rsync to NAS ...
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131 views

zfs on x86_64 on qemu on raspberry pi

I find when you try to ask for help for a bizarre problem, somebody inevitably tells you to solve your problem a different way, or they want to know what problem you REALLY want to solve, so here's my ...
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372 views

How to add an additional drive to an existing ZFS RAIDZ-1 in Proxmox?

I've a ZFS installation in Proxmox, in particular a RAIDZ-1 file system, for testing purposes (before going on production with this setup) I've added a new drive to the machine, but I'm blocked on ...
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165 views

ZFS dataset restoring

I have suddenly removed my ZFS dataset from ZFS pool. I do this from GUI of Nas4Free. In logs it was command something like "ZFS destroy Main/Video". Then i recreate dataset with same name ...
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84 views

Would a ZFS mirror with one drive mostly offline work?

Scenario: I have two external hard drives, and I'd like one to be a backup of the other. Traditionally, I would periodically connect the second drive and rsync across any changes. Does ZFS provide a ...
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300 views

ZFS (RAID-Z1) or “hardware” (RAID 5) on Linux system?

I have never put together a RAID array before, but i think i understand the concepts behind most raid types from my reading. Ordering three 3TB drives (WD red) to use in a xeon e3-1231 v3, 16GB ...
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2answers
432 views

ZFS Upgrade 2 mirrored drives to 3 drive raidz?

I have two 1GB drives configured as ZFS mirrors and now have the possibility to add a 3rd drive of 1GB. Can I reconfigure my mirror to a 3 drive raidz of (N-1)=2GB total capacity? I am running ...
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410 views

ZFS for file sharing between Ubuntu and OSX with auto mount

I want to use a ZFS volume to share files between Ubuntu and OSX on a dualboot configuration. At this point everything is working nicely except for the fact that I have to: zpool export MyPool ...
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61 views

Why can't I detach a mirrored device if enough replicas are available?

man zpool states that zpool detach Detaches device from a mirror. The operation is refused if there are no other valid replicas of the data. If device may be re-added to the pool later on then ...
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129 views

SSD's or HDD's in a LANcache?

I am building a LANcache for a lanparty that I'm organizing. We have about 80 visitors (pretty small LAN), but our uplink is limited to 100mb/s due to reasons and it's constantly saturated with game ...
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148 views

How can I get the ID of an online disk in a ZFS pool?

I rotate physical disks in and out of my mirrored ZFS zpool (using ZoL) to use for offsite backups; to help streamline the process I've been using udev rules to respond to the drives being swapped. ...
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132 views

Does using zfs with (mirrored) usb drives have any drawbacks except speed?

I'm interested in using zfs with usb drives for storage on a linux desktop machine. I already have a lot of large external drives so this will be cheaper than buying new internal drives. I might have ...
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248 views

Ubuntu hangs at startup due to zfs

I installed zfs-on-linux to my virtual Ubuntu LTS server years ago via PPA. The system resides on a VMware Workstation 10 in Windows 8.1. The working ZFS/SPL versions installed are 0.6.3. It has ...
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1k views

FreeBSD - Samba4 ignoring ZFS ACLs

I have a server running PC-BSD (FreeBSD) 10 and purely ZFS storage. I have created a jail with Warden and installed Samba 4. I have provisioned a domain, using the options for ntvfs and rfc2307 as ...
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104 views

How to diagnose HDD spindown?

I have a machine with a zfs pool on three magnetic drives /dev/sda, /dev/sdb, /dev/sdd containing larger data and a SSD with ext4 on /dev/sdc containing the rest of system (including home directories, ...
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360 views

ZFS send/recieve over ssh on linux without allowing root login

I wish to replicate the file system storage/photos from source to destination without enabling ssh login as root. I've tried a number of different combinations such as: sudo zfs send -R ...
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102 views

Solaris ZFS Mirroring - is different stripe widths valid?

I have found many articles about using ZFS mirroring with different sized disks, and it appears to be possible to grow a mirror by using larger disks. Is it possible to consolidate a stripe onto ...
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67 views

Ubuntu Home Server Packetstorm

I have a home plex server that runs various pieces of software and fills various roles. It's running the latest Ubuntu with all the latest packages/updates. About every 10 days or so, it starts packet ...
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2answers
1k views

Any performance implications of LVM and ZFS snapshots over time?

Is it bad practice to take and keep LVM or ZFS snapshots over the long-term as backups or archives? I agree snapshots are no substitute for making a second (or third) copy to take off-site, for ...
2
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1answer
618 views

Beginner Backing up ZFS Storage Pools

I'm considering moving my personal home data to ZFS on a Debian PC to take advantage of ZFS features such as data integrity and checksums, deduplication, and snapshots. The box has to be more than ...