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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6
votes
2answers
425 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 ...
0
votes
1answer
77 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 ...
8
votes
3answers
2k 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 ...
1
vote
1answer
127 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
66 views

ZFS root pool free spaze

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
285 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 ...
0
votes
2answers
402 views

ZFS vs UFS for EMC Storage

I am new to ZFS and have been reading that EMC Storage may not like it. I am building production servers that will be using Oracle 10g and Oracle 11g. Will I have any issues using ZFS or should I use ...
3
votes
1answer
448 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
2answers
978 views

Solaris iSCSI SAN

We are looking into building an iSCSI SAN for virtualization and general storage needs. At a prior job I had built an iSCSI SAN using opensolaris (back when it was SUN) and utilized snapshot send/recv ...
5
votes
2answers
813 views

Suggestions for a NAS for VMware storage [closed]

I have been looking at Openfiler, and it appears to be a great open-source solution. I haven't seen very much documentation on limitations of OF. We are by no means a Fortune 500 company (yet:) so our ...
0
votes
4answers
464 views

16 HDD bays in an off the shelf standalone server? [closed]

We currently are using custom built servers as standalone backup machines (using rsync/zfs snapshotting). They run freebsd (just so we can use ZFS) and have 16 SATA HDD's in them all connected as ...
1
vote
1answer
251 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
228 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 ...
2
votes
2answers
419 views

How much does FreeBSD differ from Linux?

I was trying to setup a NAS box for my ESXi server using linux, I was going to install ZFS and iSCSI and I thought everything was going to be awesome. I was wrong... ZFS on Linux is not the most ...
4
votes
1answer
94 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
799 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
1answer
283 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 ...
1
vote
1answer
293 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
84 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
121 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 ...
2
votes
2answers
108 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
212 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
153 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
192 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
228 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 ...
0
votes
1answer
191 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
91 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 ...
6
votes
1answer
339 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 ...
2
votes
1answer
417 views

FreeNAS: Renaming a zpool

Now that our server is set up, I would like to rename our zpools. I read somewhere that the way to do this is export & re-import under the new name. But will all my mount points and shares remain ...
0
votes
2answers
178 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 ...
1
vote
3answers
1k views

USB Flash Drives As Boot Drives In File Server

I'm designing a file server based around ZFS and I'm considering using USB flash drives in RAID 1 as boot devices. It seems that few people do this, and I'm wondering why. From what I see, using USB ...
3
votes
2answers
204 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
112 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 ...
6
votes
2answers
558 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 ...
2
votes
2answers
145 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 ...
7
votes
1answer
423 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 ...
0
votes
1answer
334 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
701 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
1answer
351 views

Why is MySQL unable to open hosts.allow/hosts.deny?

I have a storage server running Nexenta (OpenSolaris kernel, Ubuntu userspace) with MySQL on top of a ZFS storage array, using innodb_file_per_table and ulimit -n set to 8K. mysqltuner.pl confirms ...
1
vote
3answers
1k 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 ...
-1
votes
1answer
103 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) ?
1
vote
2answers
768 views

Xenserver 6.1 and ZFS file server

I want a paravirtualized ZFS server for Xenserver 6.1 supporting a 6+ TB zpool. The old templates for Xenserver 6.0.2 and FreeBSD 9 don't work. I have been unsuccessful ("Not a Xen-ELF image...") at ...
-2
votes
2answers
115 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
6answers
4k views

ZFS - zpool ARC cache plus L2ARC benchmarking

I have been doing lots of I/O testing on a ZFS system I will eventually use to serve virtual machines. I thought I would try adding SSD's for use as cache to see how much faster I can get the read ...
3
votes
5answers
921 views

ZFS pool config - advice required

We have 20 2TB SATA drives to be used in a ZFS pool. I am after some advice on the best way to achieve good I/O performance, whilst being able to offer some redundancy (3 disk failures before data ...
2
votes
1answer
144 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
3answers
3k views

how do I add a new disk to ZFS and make it available existing mountpoints if the current pool is root pool?

My S11 server has the following configuration: disk #1 is used for rpool, which is the root pool I want to add disk #2 to increase the size available for the already mounted folders, but I can't add ...
2
votes
2answers
264 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
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
87 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 ...