ZFS is a modern filesystem originally developed by Sun Microsystems and licensed under the CDDL. An open-source fork of ZFS can be found at http://open-zfs.org/ , which is supported by ZFSonlinux.org, illumos.org and ZFS developers in the FreeBSD & MacOSX communities.

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261 views

Can I recover a zpool after it's been exported, given that devices have not been reallocated?

I had a zpool we'll call 'testpool'. testpool had 3 devices included in it, and a single zfs called 'test'. I needed to move 'test' to a new, smaller pool. I wanted to name the new pool the same ...
1
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1answer
782 views

Solaris 10: How to remove devices from a zpool with /usr currently mounted?

I use Solaris 10 on SPARC. I have /usr legacy mounted on a zpool 'usr-pool'. I now need to move some of the devices in usr-pool to another zpool which is running out of room. What is the safest way ...
2
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3answers
988 views

zfs rename/move root filesystem into child

Similar question exists but the solution (using mv) is awful because in this case it works as "copy, then remove" rather than pure "move". So, I created a pool: zpool create tank /dev/loop0 and ...
0
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1answer
128 views

Zpool list showing blank values

My problem is that when I call zpool list it gives this blank output.... NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT - - - - - - - - However a zfs ...
2
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1answer
758 views

Zfs Drive config on FreeNas

Couple of related questions. Background: I have a stock of drives lying about that I want to use in a HP Proliant Microserver which has a 4 slot SAS cage with FreeNas. I don't want to spend any more ...
0
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1answer
566 views

ZFS Pool (Raidz2) of 23 disks + 1 spare. Good/Bad? [closed]

I'm creating ONE Raidz2 Pool with 23 drives and a hot spare. (I know the hot spare isn't fully supported yet but thats fine) Is it a bad idea to use this many disks in a single pool? What would the ...
1
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1answer
89 views

ZFS dedup block usage?

How can I list all the ZFS dedup blocks and the files that are associated with each one? e.g.: BLOCK FILES e6b678a /pool/a/file1 /pool/a/file2 If that's not possible, what about ...
7
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1answer
478 views

Why did my zpool replace never finish and what should I do now?

I have a ZFS zpool with two disks in a mirror configuration, da0 and da1. da1 failed, and so I replaced it with da2 using zpool replace BearCow da1 da2 This ran for a few hours, during which zpool ...
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0answers
162 views

Ubuntu 12.04 transmission-daemon and zfsonlinux: bad file descriptor and corrupt pieces

I'm running a Ubuntu 12.04 with zfsonlinux and transmission-daemon. The issues: sporadic Bad File Descriptor and Piece #xxx is corrupt errors. After I recheck the torrent, everything seems fine. That ...
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2answers
159 views

file system that allow to specify different RAID level per directory and change it afterward [closed]

I have 5 hard drives, where I want to keep my data. Some of my files are more important, and some of them are less. So some of them I wish to put on RAID-6, and for some it RAID-5 is sufficient. It is ...
0
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2answers
553 views

zfs mix raid levels in one pool

I've read that "It is not recommended that RAID types be mixed in a pool", which implies that it is possible. Why is it not recommended? It would be very desirable in my setup, which consists of a ...
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2answers
684 views

Has anybody tried to create a really big storage with ZFS and plain SAS controllers? [closed]

I'm considering to build one with something like this: http://www.supermicro.com/products/chassis/4U/847/SC847E26-R1400U.cfm (a chasis with two dual port multipath expanders) ...
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0answers
110 views

Accidentally resilvered 2 drives

We had 2 failed drives in our ZFS raidz1 pool. One had been resilvered to a spare and another was just out. The pool was in degraded mode. I replaced both drives and began the resilver on the ...
7
votes
3answers
702 views

How ZFS handles online replacement in a RAID-Z (theoretical)

This is a somewhat theoretical question about ZFS and RAID-Z. I'll use a three disk single-parity array as an example for clarity, but the problem can be extended to any number of disks and any ...
11
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1answer
7k views

For L2ARC and ZIL: is it better to have one large SSD for both, or two smaller SSDs?

Main references ZFS L2ARC (Brendan Gregg) (2008-07-22) and ZFS and the Hybrid Storage Concept (Anatol Studler's Blog) (2008-11-11) include the following diagram: Question Should I interpret the ...
2
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3answers
700 views

ZPOOL Mirror setup

What is the best setup for an zpool intended for database big inserts or TCP/IP dumps (i mean sustained high write throughput using 4 disks ? I want buy 4 Wd RE4 2TB drives and get the more power i ...
2
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1answer
564 views

How best to integrate PPA into Debian?

I'm working with ZFS on Linux, on my Debian squeeze server. I've found a useful package in an Ubuntu PPA, apparently by one of the ZoL developers, and I would like to integrate it into my package ...
0
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1answer
708 views

ZFS SSD Trim and Software Raid 5

I am trying to find if the ZFS filesystem has added support for Trim to Raid 5? I am setting up an SSD array in Raid 5. I also would like to know if there is any good software raid 5 alternatives to ...
1
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1answer
179 views

ZFS for offline backups

I'm thinking of using ZFS to backups files to single drives that are going to be kept mostly offline. Does anyone know if the FreeBSD ZFS implementation still uses memory if a dedupped pool is ...
0
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1answer
2k views

NAS4Free disk encryption and ZFS error

I have installed a NAS4Free on a VM, and as recommended, I installed it on a 1GB virtual disk, and assigned another disk 500GB to this VM for file storage. I have created the disk, encrypted it, ...
3
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4answers
2k views

XenServer and ZFS via NFS

I'm trying to connect a NFS share to XenCenter. The NFS server is a ZFSGuru distro (uses FreeBSD). The zfs volume was exported like this: /sbin/zfs set sharenfs="on" temppool/share According to ...
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1answer
222 views

Why is a ZFS pool not persisting over server restart?

I have a ZFS pool with 4 drives. It also has a 3gb ZIL and a 20GB L2ARC that are each partitions on an SDD that doubles as my Linux Mint (ver. 13) boot drive. The pool is mounted to /data. The ...
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2answers
996 views

Solaris 10 x86 - trying to replace disk in zpool

I am having trouble replacing a disk on an existing zpool on a system running Solaris 10 on an x86 processor. The zpool was originally created with two mirrored slices. One of the drives failed, so I ...
2
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3answers
640 views

ZFS on top of iSCSI

I'm planning on building out a file server using ZFS and BSD, and I was hoping to make it more expandable by attaching drives stored in other machines in the same rack via iSCSI (e.g., one machine is ...
3
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2answers
3k views

ZFS over iSCSI high-availability solution

I am considering a ZFS/iSCSI based architecture for a HA/scale-out/shared-nothing database platform running on wimpy nodes of plain PC hardware and running FreeBSD 9. Will it work? What are possible ...
4
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2answers
3k views

What is a “hot spare” on FreeNAS?

What is a "hot spare" with regard to ZFS RAIDZ on FreeNAS? I'm hoping that it means an extra, attached disk that can automatically take over for a failed disk in the RAID ... ? If so, how do I set ...
2
votes
2answers
2k views

FreeNAS confusion: not sure what happened. raidz1 “DEGRADED”, disk “FAULTED”

Sorry for the long narrative, but I'm thoroughly confused. I'm using FreeNAS-8.0.4-RELEASE-p2-x64 (11367) on a box with 5x3TB SATA disks configured as a raidz volume. A few days ago, the console ...
0
votes
1answer
243 views

FreeNAS: How to increase scrub 'threshold'?

My NAS box is set to default scrub threshold every 35 days. How do I change it to scrub every Saturday night? Do I need to create a cron job? I'm on FreeNAS-8.0.4-RELEASE-p2-x64 (11367)
7
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4answers
3k views

Can I trust that ZFS is consistent between Linux and FreeBSD?

I'm planning to build a FreeNAS box sometime soon, but if ZFS on Linux eventually proves to be reliable, I might want to switch, just to have a more familiar OS. So I'm wondering if I can trust that ...
3
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1answer
2k views

How do physical disks passed through ESXi perform vs. passing through HBAs?

Context: I have a SAN operating system (Nexenta) that runs on ESXi. It has a couple of HBAs passed through to it already, via VT-d. All of the HBAs for the SAN OS are full (no free connectors). I ...
6
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1answer
402 views

FreeNAS ZFS Kernel Panic

I'm running FreeNAS 8 and my computer had a hard reset from a power outage and now every time I try to boot I get the following error message: Error Message: panic: zfs_replay_acl_v0:898: unsupported ...
18
votes
2answers
2k views

ZFS Data Loss Scenarios

I'm looking toward building a largish ZFS Pool (150TB+), and I'd like to hear people experiences about data loss scenarios due to failed hardware, in particular, distinguishing between instances where ...
2
votes
1answer
813 views

HP MDS 600 compatibility questions

I've bought a used HP MDS 600 to use as JBOD to a ZFS filesystem. Originally I just assumed that it was a pretty 'dumb' box and I'd be able to use a SAS card like the 16-port LSI one, and most any ...
0
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1answer
638 views

Native ZFS Configuration on Ubuntu

I'm experimenting with Native-ZFS on Ubuntu right now. Here are the drives installed on the system: 2 x 2TB 3 x 1TB a 200GB operating system disk I've got the OS installed and the stable ZFS RC ...
6
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1answer
398 views

Identifying the number of changed bytes between two ZFS snapshots of the same file

Let's assume I have a ZFS filesystem that contains virtual machine disk images, e.g. /tank/examplevm/examplevm-flat.vmdk Let's further assume I take daily snapshots of that ZFS filesystem, e.g. $ ...
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3answers
2k views

Backup storage server with ZFS

I am IT everything man at a small company. I want to design a new infrastructure including a new server and a separate backup server with company wide backup policy. The most important thing in the ...
1
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1answer
254 views

Nexenta, NFS and LOCK_EX

I'm currently using an LAMP architecture and I expect a big problem :( I have several http web server using PHP5. All are mounting via NFS (v3) the directory for all the hosted websites. The file ...
1
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1answer
254 views

How to Set up Amazon EC2 with Nexenta OS?

I want to use Nexenta os for testing purpose and really want to test it out over aws ec2. I couldnot find any Nexenta os ami's. So, i was wondering if there's any way to set up Nexenta os on aws ec2 ...
2
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0answers
224 views

ZFS - Pool name has the same name as Dataset (volume)?

I messed up my pool by doing zfs send...receive So I got the following : zpool list NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT rpool 928G 17.3G 911G 1% 1.00x ONLINE - tank1 ...
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votes
1answer
107 views

Getting data out of a ZFS HDD without pool

After a lot of manipulation mistakes, is it possible to extract the data from a HDD which was mirrored in ZFS, but with a destroyed pool (even zpool import -D does not work) ?
5
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1answer
1k views

Raidz in FreeNAS eating more space than expected

I just got 6 new 2TB drives, and added them to my FreeNAS box. I have only dealt with RAID1 previously, and each setup has given what I was expecting. However, with the 6*2TB drives, I wanted to ...
10
votes
2answers
497 views

Why are all of my ZFS snapshot directories empty?

I'm running an Oracle 11 box as a ZFS storage appliance, and I'm taking regular snapshots of the ZFS filesystems, via cron. In the past, I know that if I wanted to grab a particular file from a ...
2
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0answers
231 views

What ZFS file structure to use for zfs-root linux system?

In ZFS, you can build your filesystem hiearchy to include different fs-attributes per filesystem. For insance, compression in one area, no-exec/suid in others, noatime. For example, a HOWTO for ...
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1answer
1k views

Does ZFS replace the need for hardware/software RAID?

I want to provide protection against data loss on my servers. Typically, I'd use hardware RAID 1 or 5, but I've been reading up on ZFS. Is it correct that ZFS itself provides RAID 1 or 5 like data ...
15
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1answer
7k views

Hosting a ZFS server as a virtual guest

I'm still new to ZFS. I've been using Nexenta but I'm thinking of switching to OpenIndiana or Solaris 11 Express. Right now, I'm at a point of considering virtualizing the ZFS server as a guest within ...
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0answers
275 views

open indiana storage server recommended hardware [closed]

i want to build a storage server to replace an xserve with around 50TB available storage. i see alot of server build out there. some of them are outdated some are not complete. this should give a mac ...
3
votes
1answer
405 views

Cacti displaying an odd Total Space value for free disk space on ZFS mount

I'm not sure if this is just a quirk of how ZFS ZPL is presenting the available space, but it seems that SNMP is reporting the free space no more than 2TB higher than the used space. This is on a ...
1
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1answer
2k views

Ubuntu and ZFS, loses pool on reboot

I'm using a fresh install of Ubuntu 12.04 LTS, with the ZFS PPA. I'm finding when I create a pool it will mount and function fine, but after a reboot it shows as UNAVAIL and I can't find a way to ...
4
votes
1answer
870 views

Solaris 11 hangs randomly: need help to figure out the reason

I've got Solaris 11 (+latest SRU) running on an HP DL385 G7 (attached to P2000 storage w. 30 disks; they are registered as separate RAID0 drives, but I'm using ZFS' raidz1), which is our file server. ...
2
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1answer
345 views

Moving data from linux mirrors into freebsd ZFS

I got an 3 years old computer with 4GB RAM Dualcore/Intel, and 4 hotswapable SATA HDD's (500GB each, 2+2 in LINUX RAID-1 configuration - so i have 2 500GB mirrored volumes). Each volume is full of ...