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

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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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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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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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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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44 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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ZFS panic in debian

All my server's process relative to zfs are in 'D' state. Here is dmesg: [ 108.965838] BUG: unable to handle kernel NULL pointer dereference at 0000000000000048 [ 108.965993] IP: ...
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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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20 views

Moving ZFS drives from RDM to VT-d

Last year I built a simple NAS box using a Napp-it vm on ESXi. I bought a server(ish) board, ECC RAM and 4 x 4TB drives to store the data. Since I'm new to sever building I mistook "Virtualization: ...
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26 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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63 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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165 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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30 views

ZFS raidz1 or raid10 or both?

This might be a long post. I am currently building a new server to replace ESXi with SmartOS. I currently have 4 - 2TB drives of uncertain origin in a raid10. I believe 2 are greens and maybe a black ...
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17 views

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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48 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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36 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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57 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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36 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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38 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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34 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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51 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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143 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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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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187 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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63 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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32 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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91 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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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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89 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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41 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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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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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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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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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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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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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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140 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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202 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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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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351 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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225 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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94 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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228 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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315 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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254 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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1k 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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70 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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122 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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641 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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707 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)