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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75 views

Recovering data from ZFS mirror

I have two disks from an old server that I believe were a mirrored set. I placed them in a new server and tried to do a zpool import but nothing was found. Does that mean the data that was on them ...
1
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1answer
549 views

Does a 3ware “ECC-ERROR” matter on a JBOD when I have ZFS?

I have a FreeBSD 8.x machine running ZFS and with a 3ware 9690SA controller. The 3ware controller shows an ECC-ERROR with one of the disks: //host> /c0 show VPort Status Unit Size ...
1
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1answer
214 views

What is the best private cloud storage setup

I need to create a private cloud and I'm searching for the best setup. These are my 2 most important requirements 1. Disk and system redundant 2. Price / GB as low as possible The system is going to ...
4
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1answer
500 views

ZFS ARC size vs target size

I am trying to understand the inner workings of the ZFS ARC. However, I am confused with several things: actual (zfs:0:arcstats:size) vs target size (zfs:0:arcstats:c). I understand that actual size ...
4
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2answers
214 views

Where ZFS configuration is saved?

I have a simple setup: Ubuntu 13.04 on internal USB thumbdrive 4xSATA drive in raidz spool with some volumes /tank/vol1, /tank/vol2 Where does zfs store its' configuration data - is it on ...
4
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2answers
772 views

What happens to missed writes after a zpool clear?

I am trying to understand ZFS' behaviour under a specific condition, but the documentation is not very explicit about this so I'm left guessing. Suppose we have a zpool with redundancy. Take the ...
0
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1answer
81 views

Can you add two non-mirrored disks to a zfs pool?

Is there a way to do something like this? zpool create newpool raidz /dev/disk1 /dev/disk2 ( /dev/disk3 + /dev/disk4 ) Assuming disk1 and disk2 are larger, and disk3 and 4 are smaller. You can get ...
3
votes
2answers
247 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
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2answers
66 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
243 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
414 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
79 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
724 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
73 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
2k 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
630 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
817 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 ...
7
votes
2answers
3k 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
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2answers
130 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
157 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
108 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
495 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
1k 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 ...
1
vote
1answer
336 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
441 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
198 views

ZFS: will RAM shortage cause trouble?

what can happen if i've not enough RAM with a ZFS with dedup option activated?
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vote
1answer
607 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
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1answer
121 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 ...
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vote
2answers
148 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
815 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 ...
8
votes
3answers
4k 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
440 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
283 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
279 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
305 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
274 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
160 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
356 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
182 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
316 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
337 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
600 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
181 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 ...
1
vote
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
621 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 ...
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votes
2answers
131 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 ...
0
votes
1answer
530 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
7k 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 ...