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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Why does a ZFS resilver scan the entire pool?

I have a zpool where I have just replaced a failed disk, and started a resilvering to the new disk. What I don't understand is, why zpool status says it want to scan 129TB, when the size of the vdev ...
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13 views

zpool disappears whenever solaris cluster reboot or power cycle

I have following setup Oracle Solaris 10 -> 5.10 Generic_147147-26 sun4v sparc Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit production Oracle Solaris Cluster 3.3u2 for Solaris ...
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3answers
3k views

Where can I find introductory documentation for ZFS?

I recently installed OpenIndiana because of an interest in ZFS. I like the feature-list of ZFS, but I'm having a hard time wrapping my head around how to configure it. All of the documentation I ...
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1answer
4k views

NFS issue brings down entire vSphere ESX estate

I experienced an odd issue this morning where an NFS issue appeared to have taken down the majority of my VMs hosted on a small vSphere 5.0 estate. The infrastructure itself is 4x IBM HS21 blades ...
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4answers
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? ...
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4answers
4k 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 ...
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28 views

External USB disks on FreeNAS

I have a WD external USB disk (it is new), that works just fine on Linux with ext4 filesystem, but then when I use on FreeNAS and mount the ZFS volume I get error while writing into it. ...
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252 views

Solaris x86 11.1 and qlt driver — only 3/4 ports attach

I'm using the QLogic QLE2564 4-port 8Gb HBA. The problem I have is that when I attach the qlt target mode driver to the card, only 3/4 ports attach the driver. ffffc10006854e58 pciex1077,2532, ...
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1answer
2k 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 ...
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7 views

Solaris 10 inherit group write on ACL

I'm trying to get group write permissions to be inherited in Solaris 10. It isn't working. I've set aclinherit and aclmode to passthrough using zfs set. Unfortunately, a group@:w...:deny rule is ...
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1answer
234 views

Should I create ZFS zpools with whole disks or partitions?

I am making zpools on FreeBSD machine. While creating zpools i observe these two cases:- If i take raw disks and create zpool then i am able to form zpools and they are working perfectly. If i ...
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2answers
100 views

How to partition drive for ZFS

I'm trying to create a ZFS pool using the following command: zpool create MyPool disk /dev/sda However, I get the following error: cannot use '/dev/disk': must be a block device or regular file ...
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1answer
724 views

NexentaStor: how to partition SSD disk?

I'm trying to set up some homegrown storage using a desktop motherboard, 4 x SATA drives and 2 x SSD drives. I'd really like to use NexentaStor for its nice web interface and for it is some ...
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0answers
42 views

ZFS (Solaris 11) - SAS controller died & was replaced - pool is suspended

(Note I will amend with zpool status for clarity, when I return to the server) I have a 6x2TB disk raidz2 ZFS pool which I am hosting in Solaris 11 My original M1015 (flashed to IT mode) installed 2 ...
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1answer
1k views

Ubuntu client can't mount Nexenta NFS

I have a Nexenta storage box (Solaris), which exports an NFS share. Mac OS X and older Ubuntu clients can mount the NFS share just fine without any special options. Later version of Ubuntu simply ...
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0answers
31 views

smbd processes in uninterruptable sleep

I have fileserver running FreeBSD 10.1. The server's storage consists of two HDDs in a mirrored ZFS pool. This server is running Samba 4.1, as domain member. The domain controller is running on ...
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1answer
20 views

Can OpenAFS be used as NFS?

I have an application that only runs on Linux, which will generate ~500TB of data over the next year, which all must be kept and backed up each day. It would be temping to go with ZFSonLinux or ...
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4 views

SSD's or HDD's in a LANcache? [migrated]

I am building a LANcache for a lanparty that I'm organizing. We have about 80 visitors (pretty small LAN), but our uplink is limited to 100mb/s due to reasons and it's constantly saturated with game ...
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1answer
22 views

ZFS, mdconfig, GELI and getting my head around

I want to create an encrypted virtual disk but I am struggling with understanding some basic concepts. Please correct me if any of these statements are wrong: I need a block device that geli can ...
5
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3answers
492 views

zfs - two pools with nested mountpoints and conflicting mount order

I have a problem with automounting separate pools, that have nested mountpoints. I am using ZfsOnLinux 0.6.2. The siuation currently is as follows: zpool1 ---> /var zpool1/log ---> ...
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1answer
27 views

Data recover hardware raid vs zfs pool

How does one recover data after disk failure in zfs software raid or Synology hw raid? Is it easier , less corruption in one or other ? Is one more susceptible to write corruptions than other ? ...
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3answers
6k views

Is a large RAID-Z array just as bad as a large RAID-5 array?

For a long time I've heard about how bad an idea a large (>5TB?) RAID-5 array is simply because there's a high risk for another drive to fail. Has RAID-Z1 managed to remedy this for an array of any ...
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3answers
3k views

Which version of ZFS allows shrinking of a pool?

I found a list of versions and their Solaris release numbers http://download.oracle.com/docs/cd/E19253-01/819-5461/appendixa-1/index.html I know that you can grow a pool by replacing drives with ...
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1answer
1k views

FreeNAS/FreeBSD: How to access status of ZFS volume from jail?

I am trying to set up NRPE to enable remote Nagios monitoring of a new FreeNAS 0.91 system. I mostly have this working. I can connect and inquire about basic information like number of processes, ...
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2answers
341 views

Is it Possible to Automatically Resilver a ZFS Array On Hotswap

I'm trying to learn about ZFS for a NAS I'm planning on building. I'm trying to understand if the following scenario would be possible to set up. Disclaimer: I know very little about ZFS, so forgive ...
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2answers
2k views

zpool import: volume FAULTED with corrupted data, is it possible to save some data?

I was using Freenas 8.2 and decided to upgrade to 9.2. All seem to go well, upgraded zfs to 28 and rebooted. During next boot it seem to take forever and at some point I decided to turn off the ...
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28 views

ZFS on FreeBSD panic: allocating allocated segment

My PCBSD (i.e. basically FreeBSD) system won't boot anymore, I'm getting the above error message when importing the storage pool. This is apparently a known issue (see e.g. here, here or even Oracle's ...
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3answers
5k views

Non-ECC memory with ZFS: a stupid idea?

I have a new server and am planning to upgrade the paltry 2 GB of memory to the maximum of 16 GB. (Theoretically 8 GB is the limit, but empirically 16 GB has been shown to work.) Some guides advise ...
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3answers
2k views

ZFS volume as ISCSI target

I'm looking into ZFS and using FreeNAS for ZFS management and have the following question: Do the ZFS advantages as deduplication, auto error fixing etc still work when creating an iSCSI target on a ...
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2answers
7k views

Need to replace disk in zpool … confused

I need to replace a bad disk in a zpool on FreeNAS. zpool status shows pool: raid-5x3 state: ONLINE scrub: scrub completed after 15h52m with 0 errors on Sun Mar 30 13:52:46 2014 config: ...
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1answer
69 views

Prevent HDDs from spinning up before shutdown in Ubuntu/ZoL/SAS2008 environment

I am running Ubuntu 14.04.2 with ZFS on Linux. As I ran out of SATA ports on my Asus M5A78L-M/USB3, I bought a Dell PERC H200 card and crossflashed it to LSI 9211-8i P19 IT mode firmware to ...
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2answers
46 views

Does ZFS in mirror mode double vdev read performance?

I'm not able to find a clear yes/no answer to this simple question: does using ZFS in mirror mode double the read performance of the underlying vdevs? This applies to either individual requests or ...
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2answers
241 views

Is a degraded RAIDZ2 the same as a RAIDZ?

Background on this question: I have a litte server with five HDDs pooled together in a RAIDZ. Last week one of my HDDs died. So I bought a new HDD and replaced the dead HDD. During the resilvering the ...
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1answer
150 views

NexentaStor 3.1.5-GA (community ed) won't boot from a CD

I can boot from 3.1.5-GA ISO into a VirtualBox VM. But when I boot from a bootable CD, it stops at "Grub Stage2", and then drops me into a grub rescue shell after a few seconds.. I know very well how ...
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1answer
142 views

How can I validate a ZFS snapshot image residing on a backup system?

I'm running a FreeBSD host with ZFS. Let's pretend that I am storing a series of incremental ZFS snapshot images on a remote host using zfs send: zfs send -i zpool/data/foo@04hoursago ...
2
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1answer
118 views

ZFS cksum errors on LSI 9207-9i (SAS2308) with Samsung 850 Pro SSDs

I am testing an LSI 9207-8i controller with 8x Samsung 850 Pro 256GB SSDs attached. SSDs are running latest firmware EXM02B6Q, controller is running P17 and has exhibited same issues with P19. Server ...
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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 ...
2
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1answer
157 views

ZFS - zpool replace never finishes

I have a 5 x 3TB raidz1 array on a ubuntu 14.04.1 server. Last month, one of the drives died (audible clicking). I was able to replace the drive with zpool replace RAID <dead drive> <new ...
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2answers
80 views

Convert raidz1 to raidz2 via a temporary drive

I set up a new NAS server a few months ago and set it as RaidZ. I'm re-thinking that decision and would like to grab an extra drive and move to RaidZ2. Before everyone replies that this isn't possible ...
3
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1answer
275 views

FreeNAS zfs zraid two failing disks

I have a FreeNAS 8.3 file server with ZFS running four 3TB disks in raidz. camcontrol devlist: at scbus0 target 0 lun 0 (pass0,ada0) at scbus1 target 0 lun 0 (pass1,ada1) ...
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2answers
156 views

Convert ZFS mirror with 3 active disks into 2 + 1 hot spare

After installing Proxmox VE 3.4 with ZFS and raid1 using three disks I get the following pool: root@pve:~# zpool status pool: rpool state: ONLINE scan: none requested config: NAME ...
3
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1answer
126 views

ZFS shows pool state FAULTED, but all devices are ONLINE; how can I recover my data?

Our 100TB NAS based on FreeNAS 8 was unexpectedly powered off due to power failure. After turning it on back, 100TB zpool "projects" was unmounted with state "FAULTED". I've tried zpool import -fFX, ...
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1answer
38 views

Does the LSI 9211-8i add any data structures of its own when used in pure HBA (JBOD) mode?

I'm looking at adding some disks to one of my systems, for which I need to add an offboard HBA. Looking around, I came across the LSI MegaRAID SAS 9211-8i (LSI part number LSI00194) which looks quite ...
6
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1answer
262 views

incomplete recursive snapshots on zfs

I got a bunch of new disks on one of our systems and wanted to transfer an existing pool over to them so what I did was this: zfs snapshot -r old-pool@replicaton zfs send -R old-pool@replication | ...
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1answer
713 views

Slow performance due to txg_sync for ZFS 0.6.3 on Ubuntu 14.04

I am using native ZFS with "ZFS on Linux" installed from the PPA here. Setup was not a problem and I am using it in mirrored configuration with two WD 4TB Red HDDs. Unfortunately I am having ...
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1answer
94 views

Why is the use of ZFS without ECC RAM “not recommended”? [duplicate]

I've been reading up on FreeNAS and RAID Z, and one of the things people kept mentioning is that you shouldn't use ZFS (or more specifically, RAID Z) on a machine without ECC RAM. I'm wondering what ...
3
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2answers
2k views

ZFS Recover from Faulted Pool State

I have a six disk ZFS raidz1 pool and had a recent failure requiring a disk replacement. No problem normally, but this time my server hardware died before I could do the replacement (but after and ...
3
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3answers
2k views

mounting ZFS zvol snapshot locally gives “Invalid argument”

I'm trying to mount a snapshot of a ZFS zvol. The zvol should have a ext2 partition on it (as evidenced by the CentOS VM to which the zvol is currently shared by iSCSI): [root@test-vm ~]# file - ...
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2answers
46 views

What types of workloads require SAS disks compared to SATA?

I am looking to outfit my new server (new to me) with larger capacity disks. The server right now has 4 SAS 146GB disks in it. My original thought was to just buy larger SAS disks and replace or add ...
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108 views

zfs raidz can not read from disk

my freebsd 10 server running on zfs raidz. I have a problem with reading files, test dd of=/dev/null if=/tmp/test/1000mb.bin bs=1024k count=1000 953+1 records in 953+1 records out 1000000000 bytes ...