7
votes
0answers
74 views

What happens if I force ZFS to detach a hot spare with no valid replicas?

I have a ZFS pool made out of 6 RAIDZs. One of the RAIDZ is degraded, due to loosing two disks in the single RAIDZ close enough together that ZFS wasn't able to recover from the first failure before ...
1
vote
2answers
85 views

ZFS RAID0 pool without redundancy

I created a ZFS pool on Ubuntu 14.04 without specifiying RAID or redundancy options, wrote some data to it, rebooted the machine and the pool is no longer available (UNAVAIL). I don't have the exact ...
3
votes
4answers
866 views

ZFS on linux upgrade from 0.6.2 to 0.6.3 made my zpool unreadable help translate CentOS to Ubuntu commands

After upgrading my ubuntu 13.10 server using sudo apt-get upgrade and rebooting, my zpool wouldn't show. messier@ANDERSON:~$ sudo zpool status no pools available messier@ANDERSON:~$ sudo zpool import ...
4
votes
3answers
560 views

Update from zfs-0.6.2-1.el6.x86_64 to zfs-0.6.3-1.el6.x86_64 has made by zpool unreadable

After running # yum update zfs and restarting my CentOS 6 ZFS on Linux system can no longer see or interact with it's zpools. # zpool status no pools available # zpool import zpool: ...
11
votes
1answer
269 views

Why did rebooting cause one side of my ZFS mirror to become UNAVAIL?

I just recently migrated a bulk data storage pool (ZFS On Linux 0.6.2, Debian Wheezy) from a single-device vdev configuration to a two-way mirror vdev configuration. The previous pool configuration ...
1
vote
1answer
118 views

I/O Errors but no smart or ZFS errors

I'm having trouble to identify a problem for a friend of my. He is running ZFS on Linux with the Debian distribution. We are getting these entries into the dmesg. [273044.834151] mpt2sas0: ...
8
votes
1answer
226 views

Where is the overhead for ZFS RAIDZ2 on 4K sector disks going?

I started by creating 16 empty files of exactly 1 billion bytes: for i in {1..16}; do dd if=/dev/zero of=/mnt/temp/block$i bs=1000000 count=1000 &> /dev/null; done Then I created larger and ...
5
votes
1answer
231 views

Are ZFS pools or LVM volume groups more reliable for utilizing many partitions?

When deciding whether to use LVM volume groups or ZFS pools in configuring new file servers, what needs to be considered? Is there a "better" choice in the realm of multi-purpose file servers? Unlike ...
7
votes
2answers
672 views

ZFS RAID and LUKS encryption in Linux

I'm planning to setup a set of 3x 2TB 7200rpm drives as a LUKS-encrypted Z-RAID pool in Linux (for a NAS solution). My understanding of the problem at hand is that the only way to achieve this is to ...
2
votes
0answers
150 views

ZFS on RedHat configuration

I have to set up a ZFS storage appliance (Oracle ZFS Storage ZS3-2) with NFSv4. The NFS is mounted on a Redhat 6.5 cluster, where the linux users are created (they don`t exist on the appliance). ...
3
votes
1answer
56 views

Expanding ZFS on MDRaid?

I had a 4-disk mdraid of 8.12TB with zfsonlinux's ZFS: # zpool status pool: tank state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM tank ...
-2
votes
2answers
241 views

Why does a failed ZFS disk still seem to work fine?

Two disks just failed in my zpool with read/write errors, so I took them out and inserted them in another host, created a zpool just with them, and filled the file system with dd if=/dev/zero ...
0
votes
1answer
314 views

Debian KVM and location for vm images different than /var/lib/libvirt/images

I have defined storage pool for VMs on ZFS: virsh # pool-dumpxml zfs <pool type='dir'> <name>zfs</name> <uuid>b2fba550-467f-8133-dee8-44ada7d0a807</uuid> ...
2
votes
1answer
348 views

Using ZFS or XFS on a Xen guest running Linux

Background: I'm investigating the viability of using a filesystem other than ext3/4, with the ability to run snapshots for backup and rollback purposes. The servers under consideration are mailbox ...
3
votes
2answers
651 views

Can XFS or GlusterFS replace my ZFS needs?

Right now I have a FreeBSD hosts with ZFS and NFSv4. It is replicated to another FreeBSD box for backup purposes. The ZFS features that are important to me are software RAID6 snapshots, or some ...
1
vote
2answers
271 views

Increase space of ZFS pool over iSCSI SAN, online

I have an iSCSI volume of 96GB on SAN, which has ZFS pool implemented on it. i have resized the size of SAN volume from 96 to 120GB, but the zpool list only shows the old space (96GB). how to achieve ...
1
vote
1answer
340 views

cannot create zfs pool on iscsi multipath drives

I have a disk on iSCSI SAN, which i have mounted on my server through multipath. when i run the command to create zfs pool using zpool create -f zfs-data /dev/sdc or zpool create -f zfs-data ...
2
votes
3answers
685 views

How to run a command once a ZFS scrub *completes*?

I would like to use cron to schedule periodic scrubs of my ZFS pool, and at some reasonably short time after the scrub finishes, email a status report to myself. The purpose of this is to catch any ...
5
votes
2answers
119 views

ZFS Equivalent of lvdisplay snap_percent

I've been using LVM snapshots for backing up MySQL databases. FLUSH TABLES WITH READ LOCK is issued and then lvcreate --snapshot --size 4G etc. Because the database is live while the snapshot is ...
4
votes
1answer
873 views

scsi and ata entries for same hard drive under /dev/disk/by-id

I am trying to set up a ZFS pool using 4 bare drives which I have attached to my Ubuntu system via a SATA hot swap backplane. These are Hitachi SATA drives. When I list the contents of ...
5
votes
4answers
762 views

What are the performance implications of running VMs on a ZFS host?

I'm considering migrating from ext3 to ZFS for data storage on my Debian Linux host, using ZFS on Linux. One killer feature of ZFS that I really want is its data integrity guarantees. The ability to ...
2
votes
0answers
62 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: ...
1
vote
1answer
140 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
401 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 ...
3
votes
1answer
237 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
129 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 ...
3
votes
2answers
246 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
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 ...
2
votes
2answers
313 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 ...
0
votes
1answer
77 views

How to mount zfs pools created on a different disk

I Upgraded my kernel and the driver letter changed so I lost my zfs disks (this is a test system). So I wanted to know how to recover them.
1
vote
2answers
918 views

ZFS/Btrfs/LVM2-like storage with advanced features on Linux? [closed]

I have 3 identical internal 7200 RPM SATA hard disk drives on a Linux machine. I'm looking for a storage set-up that will give me all of this: Different data sets (filesystems or subtrees) can have ...
4
votes
1answer
2k views

How to NFSv4 share a ZFS file system on FreeBSD?

Using FreeBSD 9, and created a ZFS file system like so zfs create tank/project1 zfs set sharenfs=on tank/project1 There are many howto's on setting up NFSv3 on FreeBSD on the net, but I can't find ...
3
votes
1answer
445 views

Does NFSv3 respect ZFS ACL's?

NFSv3 of course doesn't support ZFS ACL's, but what will happen if I have the following setup?: +-----------------------------------------+ +-------------+ | FreeBSD ZFS serv1 ...
8
votes
1answer
534 views

How do you create large, growable, shared filesystems on Linux at AWS?

What are acceptable/reasonable/best ways to provide large, growable, shared storage at AWS, exposed as a single filesystem? We're currently making 1TB EBS volumes ~biweekly and NFS exporting with ...
0
votes
1answer
682 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 ...
2
votes
0answers
176 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 ...
3
votes
1answer
389 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 ...
2
votes
4answers
6k views

Will a SSD cache increase Native ZFS performance for me?

I'm using Ubuntu 11.10 Desktop x64 with Native ZFS using a mirrored pool of 2x2 TB 6.0 Gbps hard drives. My issue is that I'm only getting about 30 Mb/s read/write at any time, I would think my system ...
4
votes
2answers
618 views

zfs-fuse file permissions problems on CentOS/RHEL 5

I'm working with zfs-fuse as a way to provide filesystem compression on existing CentOS 5 servers. I'm dealing with a highly-compressible dataset (80%), so zfs-fuse comes in handy. I'm encountering ...
2
votes
2answers
434 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
1k views

Native ZFS doesn't free up space when deleting files

I'm running native ZFS on Ubuntu 11.10 with 2x2 TB drives in a mirrored setup. The ZFS file system is mounted directly in Ubuntu and not through NFS or something like that, the permissions are set too ...
2
votes
1answer
387 views

Monitoring ZFS-FUSE

I am setting up a Debian-based host with a bunch of KVM-based virtual machines. Images of these VMs reside on a ZFS volume (I use ZFS-FUSE 0.6.9). Performance results seem to be very different from my ...
1
vote
3answers
1k views

How to transfer data from Linux to Solaris (OpenIndiana)?

I currently have my server setup with a Linux software RAID5 (mdamd). I have LVM on top of that, with ext3 filesystems on the Logical Volumes. This setup is mirrored on an external multi-drive ...
4
votes
5answers
1k views

ZFS on Linux based systems

Is there anyone who has more experience with ZFS under Linux based systems ? I saw ZFS fuse library, but I don't know it;s worth a test or not. Stable, usable ? Maybe as a storage ? Or only ...
4
votes
3answers
1k views

How to de-duplicate data for OpenVZ/LXC on Linux?

I want to setup multiple similar containers and I want to have de-duplication. The only solution I'm thinking of is to use OpenSolaris ZFS and share zfs volume with NFSv4 ro iSCSI target and create ...
12
votes
7answers
6k views

ZFS alternative for Linux?

I'm running OpenSolaris with ZFS for my main fileserver. I originally went with ZFS because I heard so many awesome things about it: Automatic disk spanning (zpools) Software RAID (RAID-Z) Automatic ...
0
votes
2answers
737 views

How to share ZFS features over NFS

We are planning to use some of the features that ZFS has, such as: Snapshots. Hierarchy of file systems (each user will have his own). Custom user properties. Clones. Is it possible to share all ...
2
votes
3answers
4k views

recommend storage platform: Gluster Vs Nexenta

there is a new release version 3.0: http://www.gluster.com/community/documentation/index.php/Gluster_Storage_Platform has anyone tried this for VM storage? how does this compare to any ZFS based ...
1
vote
3answers
2k views

Converting NTFS to ZFS (or other)

Are there any benefits of converting HDDs that are running NTFS on a Linux machine to ZFS? Is there a way to do such conversion in Linux without losing the data? What about the stability of ZFS on ...
0
votes
2answers
2k views

Recovering ZFS pool with errors on import

I have a machine that had some trouble with some bad RAM. After I diagnosed it and removed the offending stick of RAM, The ZFS pool in the machine was trying to access drives by using incorrect device ...