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

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zfs with heavy write off ssd

Planning a Gentoo Linux install. I have 2 each 128 Gb SATA SSD and 450 Gb SAS near-line 15krpm. I want to mirror each pair, but keep write heavy directories on SAS. Do I need to make two mirrored ...
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24 views

ZFS on Linux - is the .zfs special directory incompatible with find?

My ZFS pool has a number of datasets with snapshots that contain junk. I'm copying the valuable files to a new dataset so that I can then delete the snapshots. The basic approach I'm taking is to ...
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23 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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19 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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23 views

ZFS cache when seeding torrent

I sometimes use my home server to seed a few torrents, almost always less than 4GB. The torrent data are on a ZFS volume and most of the time there is no other access to the disks. The server has 8GB ...
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21 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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23 views

GlusterFS: Different filesystems for bricks?

I'm currently working on a small cluster (~32 nodes) where a couple nodes (8 of them) have some extra disks (3x3TB) attached to them. The filesystem on all these nodes right now is ext4. Using ...
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42 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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90 views

ddrescue rates low (~20,000 kB/s) with ZFS content on a good drive, USB 3.0 limited to USB 2.0 with a 2009 MacBookPro5,2

I find a variety of questions in Stack Exchange concerning ddrescue data transfer rates. This question – involving part of a ZFS pool – may be exceptional. Briefly Four USB 3.0 Seagate hard disk ...
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64 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 ...
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95 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 ...
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43 views

What could be reasons for a file fitting into a ZFS pool at some point, but not the second time after being removed with rm?

My problem is really as simple as follows: I want to put a file into a ZFS dataset after having deleted it with the rm command (even verified with find /path/to/pool_root -name "*" because the ...
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28 views

Can I reuse an overheated HDD after formatting in a ZFS RAID0?

I have a WD50EFRX which overheated according to SMART data (95 degrees celsius) and damaged some blocks (raw value of Raw Read Error Rate ~ 22000). There're no other values besides the Raw Read Error ...
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69 views

How to increase I/O priority of a zpool scrub (at runtime/without reboot)?

The speed of the scrub is not exceeding 5 MB/s for the first half hour (according to zpool status 2. The pool reaches 140 MB/s maximal and 50 MB/s for > 30 minutes. Watching iotop I see that txg_sync ...
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13 views

How to recognize the start and end of a zpool partition on byte/HDD block level or with broken GPT?

In case the GPT of a HDD has been deleted and possibly some partitons, but not the one that should be found with the answer to this question (because it is right in the middle of the HDD and writing ...
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59 views

ZFS and mixed drives sizes for a mirrored stripe array

I'm having a performance problem with my ZFS array that i think to be due to defragmentation. I have a striped array of 20 devices with 2 mirrored drives each. I've recently added some devices to this ...
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34 views

Viewing ZFS Raid-z device after importing with 'zpool'

I'm having trouble viewing my 'Storage' ZFS raid array. I've successfully imported the drives in with zpool import Storage. zpool status Storage returns: pool: Storage state: ONLINE status: The ...
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27 views

How to access files on a zfs pool of which only the vdev is left?

I set up a zfs pool mypool with one sparse file as vdev. After a system crash only the undamaged vdev is left. Is there any chance to get files and folders out of it? I don't care to create another ...
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42 views

What is a better approach for ZFS?

I am making zpools on FreeBSD machine. While creating zpools I observe these two cases:- If I take raw disks and create zpool then I am able to form zpools and they are working perfectly. If I ...
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910 views

How can I make Windows modify CIFS/ZFS ACLs 'correctly'

I have a FreeNAS (FreeBSD) system with a CIFS share (called "library") backed by a ZFS file system. The share is set up as per the FreeNAS GUI to use "Windows / Mac" ACLs which I'm led to believe ...
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68 views

What is a ZFS legacy mount point?

I am trying to understand the way ZFS works when I do for example, a snapshot. When I use zfs list on machine I get some mount points and some paths. For example I get something like that: ...
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54 views

Is it possible to install solaris 11 with zfs root file system in virtual box guest?

I want to test zfs file sharing capabilities using a virtual machine. Is this possible because I don't seem to get a prompt during installation to select a zfs file system.
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2k views

dkms does not find kernel source

For days now I am trying to get ZFS-on-Linux working on Debian 7 but the module doesn't want to compile: # dpkg-reconfigure zfs-dkms ------------------------------ Deleting module version: 0.6.3 ...
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69 views

Windows Version of ZFS

From what I've read about ZFS is that it allows and protects against FileROT. Which is why I commonly use this for all my FreeNAS Machines. Is there an option like that but for the Windows side of ...
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125 views

ESXi - Solaris ZFS Raids System Drive Failure Recovery (VMDirectPath I/O - raidz pool)

I currently run Solaris 11.1 in ESXi 5.5, with a HBA (disk controller card) passed though to the OS via VMDirectPath I/O and a raidz pool (called Vault). The OS is running on a single deddicated SSD ...
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101 views

how to access ZFS UNIX command line

It seems to be super easy but I just can´t get into it! All I have is the ´cli´, well documented. But I can´t execute commands like zpool, zfs etc. How do I get there? Thanks
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3k views

My ZFS dataset is gone after system upgrade/reboot (ubuntu)

I did recently upgrade my little NAS to ubuntu 14.04 and initially everything worked fine. I'm used to re-import my ZFS pools after restarts and so it was no surprise when the mount point was gone ...
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271 views

Is RAID1 or similar needed for btrfs/ZFS to protect against bit rot?

I'm running a file server using Linux software raid, set up as raid6. As filesystem I've chosen btrfs. However, I'm not using btrfs own raid6 implementation as it's not very stable yet. So basically, ...
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177 views

Growing a ZFS pool from populated ext4 disks

I've got an Ubuntu media server with 4 ext4 2TB drives, 1 ext4 4TB drive, and 1 new blank 4TB drive. The ext4 volumes are configured as individual drives (not RAID, etc.). The 2TB drives are about ...
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87 views

Changing ZFS pool partition size on “advanced format” hard drives

I have a system running Ubuntu 13.04 with three WD30EZRX drives (3 TBs each) in a pool with raidz1. These drives apparently have an "advanced format", but they misreport their physical block size. ...
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102 views

Mount a zfs detached mirror NOT rpool, just a disk

I have detached a disk from a non-root zfs pool. I would like to mount this disk and grab some data off. Is it possible to mount this disk temporarily? OS: Solaris 10 u9 How would I go about ...
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200 views

ZFS + dedup: copy many small files fast

I'm running a ZFS backup server (with deduplication) to backup websites and store them with retention. To do this, I transfer all files to the backup server during the first backup, and make a copy of ...
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279 views

How to make a snapshot of the “whole” zroot (ZFS-on-root)?

I have tried the experimental ZFS-on-root partitioning scheme available on FreeBSD 10. It seems to work fine except for a booting problem that I can quickly overcome. Anyway, this is the "partition" ...
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202 views

ZFS on linux: switch partition to whole disk

There is a ZFS pool with raidz1 in it. The pool is created on top of three 2TB drives using the whole disk and a 2TB partition on a 3TB drive. What is the recommended process to reconfigure the pool ...
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696 views

How can I access the contents of a ZFS snapshot without affecting its current data?

I have a ZFS dataset which gets hourly snapshots taken. Yesterday, a change was made to some of the files which needs to be reverted; however, the dataset has ongoing changes which shouldn't be ...
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55 views

ZFS eats resources

I am running Ubuntu Server and recently upgraded to 14.04, kernel 3.13.0-24-generic amd 64. I am using ZFS that I installed from the ubuntu-zfs package. It all works, but seems to be really heavy on ...
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59 views

ZFS on top of LUKS partitions

I have weird problem I cannot quite explain. I have three hard disks. One is the root disk sda, and then there are two more, namely sdb and sdc. The latter have two LUKS partitions sdb1 and sdc1 and ...
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98 views

Is ZFS (filesystem) good for SDcards?

Ive reviewed all filesystems listed here: http://en.wikipedia.org/wiki/Comparison_of_file_systems I like ZFS the most out of all of filesystems listed there. But is it the best choice for ...
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86 views

zfs module locks fs if storage file is used at this fs

First of all following things are related to gentoo on amd64 and zfs for linux. I'm persistently receiving mount-ro failed because we are using / on system shutdown inside my sandbox-virtual machine ...
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68 views

How to quickly erase all files on a ZFS dataset?

If I need to quickly delete all files on a file system, with UFS I can simply use newfs. Is there something equivalent for ZFS that is neither of cd mount-point; rm -rf * (not really quick) zfs ...
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561 views

Cheaper alternative to ZFS Storage for a home NAS

I'm looking to build a NAS for home use with 8-10*(2-4TB) drives, out of which 2-3 drives would be used for parity via software RAID. In the past years and up to date, ZFS seems to have become the ...
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330 views

Expose ZFS snapshots to shadow copy

I have a linux server with a zfs file system that I share via SMB over a network. I take snapshots of the file system, and it works great locally. But I want to share these snapshots over the network ...
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601 views

How to encrypt a zpool in Linux

Does zfs on linux have a built in command to encrypt entire pools (or zfs file systems)? If not - how should one proceed to do so? (I'm running zfs on an Ubuntu Server 12.04LTE)
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174 views

ZFS vs existing filesystem for SD-card

I'm thinking that micro SD-cards, because of their high storage density, are probably especially susceptible to bit rot. So I thought I might give ZFS a try. (I'm open to alternatives..) However, I ...
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204 views

Is it a bad idea to have one of multiple partitions of an ssd as cache in a raidz2 setup?

I'm setting up a system with 5 HDD's in RAIDZ2 and one SSD where the OS goes. I'm considering partitioning the system drive (the SSD) to set the free partition of the SSD as a cache in the RAIDZ2. ...
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192 views

ZFS and FreeNAS: Mirror using half a drive

I'm planning to set up a FreeNAS server with two of my spare drives: 1x 1TB drive 1x 2TB drive Both drives are identical besides their capacity and neither has any data on it. Is it possible to ...
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63 views

zfs for Linux – formatting disks

I just installed the zfs file system for Linux, but now I do not know how to format a drive with it. I am running Ubuntu 12.04 LTS Desktop and trying to format two external hard disks to mirror each ...
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1k views

Converting LVM/EXT4 to ZFS without losing data

I have a home media server with 2 x 3TB drives in it. Its currently set up using mdraid (1), LVM and EXT4. The setup was done using the ncurses Ubuntu Server installer. Goal Convert the setup to use ...
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322 views

Running ZFS as MediaStorage with non ECC-Ram

First to the Setup: I'm planning to use 8-11 USB3 Disks to form a MediaStorage The idea is to use 2 USB3 Hubs to balance the load between two seperate USB3 Ports (on different hubs) Now from what ...
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47 views

When partitioning devices for zfsonlinux, what is the correct “Partition type GUID” to use, or is this important at all?

I want to use zfsonlinux on a Debian system. Since I have advanced format drives and will employ LUKS, I have to partition the device by hand. A forum entry at archlinux.org points out that the ...