An advanced file system that can span multiple disks, heal itself from data corruption, deduplicate data, encrypt, etc.
0
votes
1answer
76 views
Migrate FreeBSD ZFS to Ubuntu
I have a HP microserver running FreeBSD 9.1 on a 3-disks RAID-Z pool, and uses this pool as root.
Now I would like to replace FreeBSD with Ubuntu server (because I am more familiar with Ubuntu/deb). ...
2
votes
1answer
112 views
Why is ZFS gzip-9 compression so much worse than actually using zip files?
I am working with some very large packet capture files (~150GB across 30 files) but because of how highly redundant packet captures are, these compress to ~7% (14.29x) of their originally file size ...
1
vote
3answers
299 views
ZFS (on Linux)'s memory requirement for a non-fileserver computer
A lot of material on ZFS mentions that basically the more memory you can throw at it, the better. However, I plan to use ZFS on a notebook with 16GB of RAM -- while that should be enough for ZFS, I ...
0
votes
1answer
178 views
ZPOOL how to remove volume?
I had a strange issue with FreeNAS reporting mulitpath/disk1 is not stable for a while with a crcck of 5. I do not have any SAS on my MB. The rest all report as ada_ except that drive. In multipath ...
1
vote
1answer
156 views
Improving small-file-performance for ZFS On Linux
I used mdadm (RAID 5) and ext4 before, I switched to ZFS On Linux (raidz) because of many reason. But when I working with small files, the performance is terrible. Only 7 MiB/s!?
How do I improved ...
0
votes
0answers
92 views
FreeNAS 8 and ext fs
i'm trying out freenas8 for my personal NAS, i have lots of data that was in an ubuntu server, but somehow i never got the file sharing right. on freenas things just worked. i installed on usb, tried ...
1
vote
1answer
394 views
Best way to mount a remote ZFS share in Windows and make it appear local, or close to local
I primarily use Linux and Mac, where sharing folders and block devices is easy and just works. I have a 38TB ZFS-backed Ubuntu fileserver that pretty much stores all of my data for all of my devices.
...
1
vote
1answer
165 views
Handling whitespaces in the name of a ZFS dataset in a shell script
I'd like to take output from two commands –
zpool list
zfs list
and for each found pool:
zpool get all nameofpool
and for each found file system:
zfs get all nameoffilesystem
Background and ...
1
vote
1answer
365 views
View ZFS deduplication ratio on a dataset
I have a tank consisting of several datasets, only one of which is configured to use deduplication.
How can I see the ratio for this dataset? I get a ratio of 1.00x for the whole pool but I imagine ...
0
votes
1answer
399 views
ESXi 5.1 - OS choices for a File Server
This past black friday i put together a small box I intended to use for a soho VM lab.
i5 processor
B75M-D3H Gigabyte motherboard
16GB of RAM
1TB seagate constellation HD (SATA3)
I want to run a ...
0
votes
1answer
106 views
Using ZFS with little RAM?
I have an Acer EasyStore with a RAID5 mdraid array I use for storing my home files (photos, movies, etc), and I want to migrate it to ZFS with Ubuntu (the native kernel module from zfsonlinux.org).
I ...
6
votes
1answer
266 views
Formula to calculate probability of unrecoverable read error during RAID rebuild
I need to compare the reliability of different RAID systems with either consumer or enterprise drives. The formula to have the probability of success of a rebuild, ignoring mechanical problems, is ...
2
votes
1answer
40 views
Blacklist filename on FreeBSD ZFS
I have a ZFS based NAS that various platforms use for shared storage, namely Windows XP/7/8 and Linux.
I've noticed that Windows clients are creating Thumbs.db files left right and centre, which I do ...
1
vote
1answer
479 views
Where is my VMware-ws FreeNAS CIFS(ZFS) bottle-neck?
Background: I'm building a quiet HTPC + NAS that is also supposed to be used for general computer usage. I'm so far generally happy with things, it was just that I was expecting a little better IO ...
2
votes
3answers
2k views
Choice of an OS for a home ZFS NAS
I am preparing a home NAS with an old Athlon 64 X2 3800+, 4 GB ECC RAM, Asus M2V MX motherboard, and a single 3 TB WDC Green (another one as mirror may be installed in the future). It's the cheapest ...
3
votes
1answer
82 views
Unmounting a zfs pool while it is shared with sharenfs
I have a Solaris (open indiana) system which is getting poor disk write performance. In order to enable ZIL in this version of zfs I need to add a line to /etc/system. This will not take affect until ...
0
votes
0answers
71 views
Can a ZFS on “raw” disks convert to ZFS-only boot?
I'm upgrading a system from FreeBSD 7.2 to 9-STABLE. My existing system boots via MBR to UFS on ad5. ad5s1a is /bootdir (which is symlinked from /boot -> /bootdir/boot). The loader.conf sets ...
2
votes
1answer
184 views
ZFS compressed and deduped filesystem on file
I can create squashed filesystems with mksquashfs in this way:
mksquashfs dir-1 dir-2 ... dir-n filesystem-on-file.squash -comp xz -Xbcj x86 -Xdict-size 1048576 -b 1024k
mksquashfs provides ...
3
votes
1answer
158 views
Can two seperate zpools exist on the same physical devices?
Short: Can I share a disk between two separate zpools?
Long: I want a raidz2 array but I can't afford it all at once. My possible solution is to start with two drives. I would create a mirror using ...
1
vote
1answer
124 views
ZFS & Deduplicating FLAC Data
I'm experimenting with using ZFS to deduplicate a large library of FLAC files. The purpose of this is twofold:
Reduce storage utilization
Reduce bandwidth needed to sync the library with cloud ...
0
votes
1answer
449 views
using ZFS on an external USB drive for backup in Ubuntu
I run Ubuntu 12.04 precise and would like to format, using ZFS, an external USB HDD to use it as a backup drive for my home directories.
Since it's just one drive I am not interested in self-healing ...
4
votes
2answers
219 views
What free space thresholds/limits are advisable for 640 GB and 2 TB hard disk drives with ZEVO ZFS on OS X?
Assuming that free space advice for ZEVO will not differ from advice for other modern implementations of ZFS …
Question
Please, what percentages or amounts of free space are advisable for hard disk ...
0
votes
1answer
324 views
Can't complete a SMART test on FreeNAS
I'm trying to run a disk test with smartctl -t long on FreeNAS.
But the test immediately aborts with Aborted by host.
From what I've read, this is because the system is using the drive, so it cannot ...
1
vote
2answers
3k views
Automount ZFS zpool in Ubuntu 12.04
So, I've been told that ZFS for Linux has the ability to automatically mount a zpool on system startup in Ubuntu 12.04, but it doesn't work for me and I can't find any documentation on how to make it ...
1
vote
2answers
207 views
Do I need differential backups in ZFS?
I am considering migrating from (debian + mirrored raid + daily differential backups + weekly full backups) to ZFS raidz. Is there any point of performing backups in ZFS the same way as my current ...
4
votes
1answer
5k views
NAS - ZFS system versus NTFS or EXT4 system
I was contemplating purchasing a QNAP 459-II for my home storage/streaming needs and a friend advised me that I should look into ZFS rather. I read up a bit on the filing system technology and was ...
2
votes
1answer
302 views
Will custom kernel module persist through kernel upgrades?
I was wondering if custom kernel modules that I compile and install via a package will persist through a kernel upgrade. I am trying to install ZFS as kernel module in Ubuntu but the problem is ...
0
votes
0answers
194 views
zfs create / delete hang on Debian Squeeze
I installed ZFS from source (configure, make deb, dpkg -i) on Debian Squeeze without any error messages.
I created a pool with zpool create tank raidz ...
0
votes
0answers
360 views
Thoughts on home NAS server [closed]
I currently have a NAS with a 2x2TB HDD 1x16GB SSD layout on a mini-itx atom board. The NAS is in a Lian Li PC-Q07 case. On this system I was running freebsd 8 with a gmirror raid 1 setup, which was ...
1
vote
1answer
92 views
Limit the amount of data that can be stored in a folder on Ubuntu Server 12.04?
I'm in the process of building my first server. It's up, it's running, I'm transferring copious amounts of data away from my horrid little Drobo (DO NOT BUY ONE OF THESE, EVER).
However, there's one ...
0
votes
0answers
95 views
How can I track down the source of disk I/O hangs?
I have a Mac Pro 1,1. Inside is a Sil3124 4-port eSATA card, connected to two TowerRAID TR8M 8-bay SATA enclosures. The enclosures are connected via 2 eSATA cables each to 2 ports on the card. Inside ...
1
vote
2answers
685 views
How to access freebsd zfs partition under Linux using zfs-fuse?
I have installed dual OSs on my PC box: Linux and FreeBSD. The FreeBSD is installed on a ZFS partion under /dev/sdb1. Under Linux, the fdisk -l /dev/sdb outputs
Device Boot Start End ...
5
votes
1answer
1k views
A ZFS or LVM or MD redundant heterogeneous storage proposal
I have the same problem most people have: how to create a reliable personal storage solution with the fact that:
Hard drives fail with alarming regularity. Losing files is unacceptable.
I will buy ...
2
votes
1answer
667 views
hosting iscsi on smartos
I am trying to get back into the unix game for some storage projects we have got going. We would love to use joyents smartos (based on illumos) for that.
Working with it is a real joy (setting up vms ...
2
votes
1answer
508 views
ZFS distribution in Linux kernel? [closed]
If anyone has a better title for this question feel free to edit
I am wondering about something related to the conflict between CDDL (Sun's license) and the GPL. Mainly pertaining to the reason ZFS ...
3
votes
1answer
432 views
using ZFS and local hard drives as a cache for a remote iSCSI SAN
This is purely theoretical idea, i dont plan on doing this any time soon, but could you use Local hard drives as a kind of Cache to remote drives stored on Amazon EC2, shared to a user via iSCSI?
The ...
2
votes
1answer
182 views
ZFS Scrub isn't making any progress
I started a zfs scrub operation over 10 hours ago, and it doesn't seem to be making any progress:
# zpool status
pool: foo
state: ONLINE
scan: scrub in progress since Sat Nov 26 00:11:38 2011
...
1
vote
0answers
175 views
Reading VMFS data from ZFS snapshot
I am wondering about something and maybe someone can give me a clue. If I have a server running ZFS plus an iSCSI target for my VMware ESXi box. Would ZFS snapshots of the iSCSI virtual block device ...
1
vote
2answers
262 views
Can you migrate an installation of Ubuntu Server from one volume to another?
Apparently, this question might be subjective (though I don't know how).
Essentially, here's what I have in mind:
I'm going to be building a NAS and am considering Ubuntu for the OS due to some of ...
1
vote
1answer
322 views
Why is ZFS stored in a binary tree structure?
Apparently, in the ZFS (filesystem), there is an uberblock that points to the root of a zpool tree. Does anyone know why this tree makes things more efficient/reliable, and where the tree itself is ...
1
vote
0answers
272 views
What are the advantages of ZFS over other file systems? [closed]
Other filesystems - such as LFS, FFS, etc - in terms of reads, and for writes for general-purpose workloads
Are there any disadvantages for using ZFS?
1
vote
1answer
444 views
ZFS (file system): what is an “uberblock” used for?
Why does ZFS (and possibly some other file systems out there) tend to use an "uberblock" on top of imaps? Why can't there just be multiple imaps instead of the uberblock?
2
votes
1answer
242 views
Rendundant & versioned filesystem [closed]
Introduction
Only wimps use tape backup: real men just upload their important stuff on ftp, and let the rest of the world mirror it!
(Linus Torvalds)
That was a long time ago (well... 1996!). ...
6
votes
3answers
3k views
TAR vs CPIO, what is the difference?
I am curious and did a bit of reading but still have questions.
What makes CPIO different than TAR? I was told in another question that tar is for pulling together many files into 1 archive which ...
1
vote
2answers
1k views
Piping in and out of tar and gzip
I am trying to get a handle on how to pipe from a command into something like gzip, cpio or tar.
The commands in question belong to the ZFS system. I am running ZFS on Ubuntu Linux 10.04.3.
The ...
4
votes
1answer
708 views
How to use ZFS on linux easily (without paths like /var/run/zfs) or as non-root
When I asked about filesystems with compression I got recommendation to try ZFS. Looks like it worth trying, however I find tools that manage ZFS (zfs, zpool) quite overcomplexified - you need to ...
1
vote
1answer
239 views
How to disable autoresume of a ZFS-formatted drive on Ubuntu
I've bought an external hard drive. I want to use it with Ubuntu 11.04 (kernel 2.6.38-11-server) and the zfs-fuse package. I've successfully formatted the disk to zfs. The disk is suspending when it ...
1
vote
1answer
302 views
Recommendations for Filesystem
I have built the bones of a NAS system (which comprises of Ubuntu server 11.04 on 500GB SATA drive, and 3 2TB SATA disks in software RAID5 configuration)...
I'm looking for some advice on what ...
2
votes
2answers
483 views
ZFS NAS: PCI-e x1 SATA or built-in ICH10R?
I am planning to install Nexenta (or NexentaStor, I've not decided yet) to build a ZFS NAS out from the following machine:
MB: Intel DG45FC
Disks: 4x 2TB WD caviar green
RAM: 2x 2GB of non-ECC ...
2
votes
1answer
804 views
Can't figure out HD replacement in FreeNAS 8
So I'm testing this out in VirtualBox, and I've got two 10GB drives as a test (mirror of ada1 and ada2, ZFS). I create a zpool/volume called "tank" with the two drives, no problem. Then I power off, ...
