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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3
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2answers
277 views

RAID 1E with ZFS

IBM's storage systems as well as Linux' mdraid do support RAID level 1E to be able to use an odd number of disks for a 50% redundancy: Would I achieve the same effect creating a zpool with an odd ...
0
votes
2answers
79 views

Mitigating risk of Disk Failure + Some corruption?

So my understanding of one scenario that ZFS addresses is where a RAID5 drive fails, and then during a rebuild it encountered some corrupt blocks of data and thus cannot restore that data. From ...
1
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2answers
340 views

Advice for inserting additional disks to a ZFS mirrored pool?

I am running FreeBSD 9.1 with root on a ZFS mirrored pool. At first the pool (labelled zroot) has a total of 1TB spanning two 1TB drives. Recently we have run into disk space issues in which the ...
3
votes
2answers
521 views

Details on ZFS scrubbing repairs requirements/guarantees

I found no details on how repairing works and what the requirements are from the docs. For automatic repairs from a scrub do I need to mirror? RAIDZ? Either? Neither (do the checksums themselves ...
2
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0answers
94 views

How do I get Ubuntu to forget about a destroyed zfs pool?

I have also asked this question over on Ask Ubuntu but I thought I'd try here as well. The details can be found at: ...
0
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2answers
885 views

Problems migrating ZFS pool from Openindiana build 151a7 to FreeBSD 9.1

I'm currently running Openindiana on ESXi with RDM access to the 2 disks in my ZFS pool. I used to run Ubuntu with ZFS on Linux but since ESXi 5.1 supports my hardware I wanted to move away from that ...
0
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0answers
78 views

Xen Debian VM and NFS

I have 2 servers in a pool running a single VM on each server. I just got xencenter running so I am managing through that. I want to have a shared storage (NFS) between the two of them, so that if one ...
4
votes
2answers
3k views

strange ZFS disk space usage report for a ZVOL

We have a 100G ZVOL on a FreeBSD 10.0-CURRENT host which claims to use 176G of disk space: root@storage01:~ # zfs get all zroot/DATA/vtest NAME PROPERTY VALUE ...
7
votes
2answers
722 views

Does speed of ZFS snapshot rollback depend on number of files?

I have tested a 10Gbit connection between two hosts to be able to read a 10GB file from host1 and write it to host2 using netcat, where the speed was 410MB/s. When I ZFS send/receive again with ...
6
votes
2answers
1k views

What does zfs receive -F do?

When I read man zfs for zfs receive I see -F Force a rollback of the file system to the most recent snap- shot before performing the receive operation. If receiving an ...
9
votes
2answers
4k views

ZFS performance: do I need to keep free space in a pool or a file system?

I know that the performance of ZFS heavily depends on the amount of free space: Keep pool space under 80% utilization to maintain pool performance. Currently, pool performance can degrade when a ...
0
votes
2answers
169 views

Nexenta - unknown trap type 8 in user mode

I'm trying to install NexentaStor 3.1.4.1 on Ubuntu 12.04 LTS KVM on AMD64 platform. During the install I encounter the following exception : "unknown trap type 8 in user mode" Can anyone point me ...
1
vote
1answer
176 views

Installing RHEL on a single disk with ZFS

I know ZFS is usually used for numerous reasons including it's amazing mirroring features. However in this instance the machine I've been tasked with setting up has a RAID-1 setup so I only have one ...
1
vote
1answer
124 views

ZFS root pool free space

I have an openindiana (oi_151a7) box where I used 30GB for the root partition during installation. This has become rpool1. I cannot figure out how to make the remaining 202 GB available. Looking for ...
1
vote
1answer
617 views

zfs send -i / receive stalling

On a Solaris 11.1 install, I see stalls when receiving a zfs incremental stream. The streams are originating from a Solaris 11.0 install, are created using zfs send -i and piped through mbuffer. At ...
3
votes
1answer
2k views

Can you set inode quotas in ZFS?

I figured out how to set block quotas in ZFS from the documentation on oracle's site. I didn't see if / how to setup a quota on how many inodes a user gets, though. I realize that there may not be ...
2
votes
1answer
398 views

ZFS configuration opinions [closed]

Currently, I'm tasked with progressively building a ZFS store. IOPS are not the priority, data security and capacity are. In essence what we have is one brute of a machine, that contains an OS ...
1
vote
1answer
559 views

Safely migrate from 3ware 9650SE-8LPML to a 3ware SAS 9750-8i?

I have a server with a potenially faulty 3ware 9650SE-8LPML. I can log in to the server but the interface keeps reseting causing the whole system to lock down for minutes. My host suspects its the ...
4
votes
1answer
264 views

ZFS: will RAM shortage cause trouble?

what can happen if i've not enough RAM with a ZFS with dedup option activated?
1
vote
1answer
733 views

How set ZFS ACL permissions on CentOS 6

I use last ZFS (ZFS for Linux) on the CentOS 6. Create successfully pool, all working fine. But i have one question. How i can set ACL for ZFS folder/file? GNU ls, chmod, and other coreutils not ...
1
vote
1answer
134 views

Can ZFS resilvering be used effectively for backing up to an external drive?

Suppose I currently use rsync to back up an internal drive periodically to an external drive. The external drive is usually stored offsite but is periodically brought over and plugged in via USB and ...
1
vote
2answers
168 views

How to delete and reuse ZFS filesystems inside a Pool

I have this ZFS Pool. NAME STATE READ WRITE CKSUM app ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 c1t2d0 ONLINE 0 0 0 ...
1
vote
1answer
1k views

ZFS rpool full, cant do anything

I have a huge problem, my rpool is full, so when i boot, i have tons of "no space on device" in my shell. No way to log, ssh server is down. So i decided to boot with opensolaris Live cd and mount ...
10
votes
3answers
6k views

Tuning ZFS scrubbing, 141KB/s running for 15 days

A pretty basic system running mirror+stripe on 7.2k rpm sas disks, not particularly loaded. No dedup, compression on all datasets. Scrub has been running for 15 days at the speed of a dead snail. Is ...
2
votes
2answers
843 views

Is it possible to change filesystem properties for an existing ZFS pool?

Suppose I created a pool with compression=on, and later wanted to turn off compression in-place - is that possible and if so how? I'm using Zevo CE on OS X in case that makes any difference (zpool ...
1
vote
1answer
321 views

ZFS about 7.2% disk space is lost

I know that ZFS reserves 1.6% disk space for copy-on-write. However, I am losing more than that. I have a ubuntu server with native ubuntu-zfs installed. The server has 45 drives, each 3TB. I am ...
2
votes
1answer
343 views

Are snapshots and clones filesystem-wide in ZFS-backed Lustre clusters

My goal is to find a distributed filesystem on Linux that supports ZFS-like lightweight snapshots and snapshot clones. This StackOverflow question expresses what I'm looking for pretty well. I'm ...
1
vote
1answer
337 views

ZFS / ZFS send for database replication

Let's say I've got a somewhat important database but one where I don't actually care about every transaction. Before you get snarky -- it is a database storing zabbix status data, so I honestly don't ...
3
votes
1answer
306 views

ZFS pool created with ZFS on Linux, usable by SmartOS?

I have a Linux server running libvirt + KVM which I am thinking of migrating to SmartOS. The server has a ZFS pool created with ZFS on Linux, where the KVM guests are stored (as ZVOLs). My question ...
1
vote
1answer
187 views

ezjail-admin update -i can't create tank/ezjail/basejail

I updated the server FreeBSD 8.2-p10 amd64 to 9.1-p1 amd64, and I want to update jails started ezjail. I downloaded the source, built the world and run the command: ezjail-admin update -i but got ...
0
votes
1answer
398 views

ZFS import pool ahcich0: timeout (NanoBSD 8.2 -> 9.1)

Many times when I had to make changes to the system, I boot from the USB drive to the new build NanoBSD then import the pool to the system. In the transition from 8.2 to 9.1, I do the same - boot from ...
1
vote
1answer
213 views

Rsync Backup from XFS to ZFS

I currently have a backup solution in place that uses rsync to backup all out Linux servers from remote sites, to an XFS drive in our HQ. I am now trying to rsync the folder from the XFS drive in our ...
0
votes
2answers
379 views

How to find files with top io on solaris ZFS?

I have a Solaris 10 ZFS based NFS server. The physical disks are more or less at their maximum io rates. Performance is very bad - so we will add spindles. The NFS solely serves as storage for ...
3
votes
2answers
422 views

ZFS pool is empty after crash

I'm on Linux 3.6.11 with ZFS on Linux 0.6.0rc11. I have a large ZFS pool with three subpools: zpool1 zpool1/backups zpool1/graphite zpool1/log_backups The machine rebooted last night, ...
1
vote
1answer
711 views

Solaris 11.1 ZFS Root rpool shows one disk unavailable and online, how to detach

This is an x86 Solaris 11.1 installation. I have two zfs pools R500 and rpool I wanted to upgrade R500 from 500GB disks to 2TB which I've done then use the 500GB disks as root rpool disks to replace ...
1
vote
1answer
2k views

using cp -p onto NFS mount on ZFS filesystem fails

I am trying to copy from an Ubuntu machine to a OmniOS ZFS pool shared via NFS. When I run the below command, I get: cp: failed to preserve ownership for `./test.txt': Invalid argument The thing ...
2
votes
2answers
206 views

Would storing logical volumes on a ZFS storage benefit from caching?

What I'm planning to do is having a ZFS storage connected to my network. Attaching it with either iSCSI or SRP to the hypervisor server. And storing KVM images (logical volumes) on it. Would this ...
2
votes
2answers
2k views

How to remove the OpenSolaris ZFS dump device

The ZFS dump device is used only for debugging problems. In this case, I have decided the risk vs reward is such that I should delete the dump device to make room for other storage. I am able to ...
2
votes
3answers
2k views

ZFS on KVM virtualised server. Should I run ZFS on the host or the guest?

I'm planning to run ZFS on Linux (latest Ubuntu stable ppa). The hardware is a xeon E3-1270 with 24 GB of RAM, 6 SAS ports on the motherboard, and a supermicro HBA with 8 SAS ports. I plan to have 4 ...
2
votes
1answer
731 views

Disk replace breaks disk naming convention in zpool

After replacing two broken disks in my RAID-Z2 pool, the output of zpool status looks strange. The disks are addressed with their full path and also seem to contain 'slices', which all other disk ...
-2
votes
2answers
134 views

Mac files on Windows server (loses some data) [closed]

We added 2 Mac's to our Windows network. We are finding that some users are deleting the Mac hidden files that provide Finder meta data. Also, if a Mac user moves a file to another folder, they don't ...
4
votes
5answers
3k views

Identify Disks on SuperMicro server running FreeBSD

I am running on a SuperMicro 2U server with 6 disks in a ZPool. I want to identify each drive bay using the Drive Carrier LED from running a command from a tool in FreeBSD. Is there a way to do this? ...
0
votes
1answer
580 views

Netatalk 3.0.1 disconnects with Bad file descriptor on FreeBSD

I am having trouble with my netatalk server 3.0.1 on FreeBSD-9.1 RELEASE. Netatalk was installed from the ports collection and is sharing some directories over the network. Update also netatalk ...
6
votes
3answers
9k views

Are ZFS clustered filesystems possible?

Is it possible to create a ZFS cluster? Or would you need to go the seemingly ugly (to me at least) route of ZFS with UFS formatted pools governed by GlusterFS? The idea is to see if it is possible ...
2
votes
1answer
407 views

Is it possible to access the ZFS checksums to compare files

I have a FreeNAS 8 machine (FreeBSD 8.2-RELEASE-p1) with two different shares on it. I'm migrating files from Share1 to Share2. The Shares have different directory structures and naming conventions. ...
2
votes
2answers
570 views

Deduplication of tar archives

Now I'm trying to configure ZFS with deduplication on my linux backup server and have a question. For example I have 1k files in backup1.tar and 1k same files and 1 new in backup2.tar. This files ...
1
vote
2answers
2k views

ZFS iSCSI and free capacity in VMFS

I use ZFS in FreeNAS 8.0.4 and use iSCSI to provide a LUN to Vmware ESXi 5.0. I post it at http://forums.freenas.org/showthread.php?10990-Memory-utilization-and-performance-problem/page4, but I ...
-1
votes
1answer
2k views

Ubuntu 12.04 RAID 5/6: Native RAID or ZFS?

I have 8 hard drives of different sizes that I want in a RAID 5 or 6 configuration, the OS is Ubuntu 12.04 desktop. Does the native RAID in Ubuntu support RAID configurations with hard drives of ...
1
vote
1answer
127 views

Available space on disk array, running Raid-Z1?

I just installed NexentaStor Open Source on a Dell R510. I created a Raid-Z1 with 4 x 2TB disks. No Spare disks configured. NexentaStor now tells me the the Datasat have 7,35TB free space, I was ...
6
votes
2answers
944 views

Why did I experience checksum errors with a ZFS filesystem on an ESXi RDM?

I have a VMware ESXi 4.1 server which I recently added 2x1TB SATA drives to. This machine runs a NexentaStor Community VM which hosts ZFS filesystems. Before adding the new drives, all the ZFS zpools ...