ZFS is a modern file system and volume manager originally developed by Sun Microsystems and licensed under the CDDL. It is a copy-on-write file system with support for large storage arrays, protection against corruption, snapshots, clones, compression, deduplication and NFSv4 ACLs. An open-source ...

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81 views

ZFS - zfs destroy snapshot during zfs send incremental

How does zfs handle destroying snapshots during an incremental send? Example: 2 servers using ZFS: zfshost1 [root@zfshost1~]# zfs list -t snapshot NAME zones/40e66d56-4ea8-11e5-885d-feff819cdc9f@...
2
votes
2answers
628 views

ZFS reads on FreeBSD incredibly slow

I have a FreeBSD 10.0 system on which I have MySQL running with its InnoDB database files stored on ZFS. It seemed to have been going fine for months, but lately, and seemingly suddenly, performance ...
3
votes
1answer
454 views

ZFS - Pool name has the same name as Dataset (volume)?

I messed up my pool by doing zfs send...receive So I got the following : zpool list NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT rpool 928G 17.3G 911G 1% 1.00x ONLINE - tank1 ...
0
votes
1answer
192 views

Missing free space from ZFS pool after migrating from FreeBSD to NAS4Free

I was running FreeBSD 10.0-RELEASE-p4 and migrated to NAS4Free which is FreeBSD version 10.2-RELEASE #0 r286738M: Thu Aug 13 21:32:58 CEST 2015. Now I'm missing free space and I can't delete any files ...
16
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5answers
12k views

ZFS best practices with hardware RAID

If one happens to have some server-grade hardware at ones disposal, is it ever advisable to run ZFS on top of a hardware-based RAID1 or some such? Should one turn off the hardware-based RAID, and run ...
3
votes
2answers
161 views

'zfs get all' returns properties for file systems with '%' (percent sign) appended

While working with zfs I saw that 'zfs get all' for some existing file systems would list properties with '%' (percent sign) added to the the name of the file system. Like so: # zfs list ... ...
2
votes
1answer
332 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 ...
2
votes
1answer
363 views

ZFS: how to replace disk that faulted while resilvering after another fault?

A disk replacement in ZFS went awry, and now the replacing disk, even though no longer physically present, is "stuck" in the pool, blocking further replacement attempts. How to remove it? In a raidz3 ...
6
votes
1answer
337 views

zfs checksum error in raidz1 vdev but not in disk

I am backing up data stored in a zpool consisting of a single raidz vdev with 2 hard disks. During this operation, I got checksum errors, and now the status looks as follows: pool: tmp_zpool state:...
4
votes
1answer
232 views

ZFS permanent error; options for recovery

Background: small personal server, email, web, shell, etc, for family and friends. SunOS 5.11, snv_113 from November 2008. Server built in 2009. I believe that was either opensolaris or Solaris early ...
2
votes
2answers
205 views

Ways to set up a ZFS pool on a device without possibility to create/manage partitions?

I have a NAS (Synology DS214 with DSM 5.0) where I don't have a possibility to create and manage partitions (maybe I could with some hacks that I don't want to make). What ways to setup multiple ZFS ...
11
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3answers
2k views

ZFS: How do you restore the correct number of copies after losing a drive?

With zfs, if you have copies=2 and then you lose a drive containing some of those copies, how do you tell the system that it should make a new copy of the data blocks for the affected files? Or does ...
4
votes
5answers
7k 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? ...
2
votes
3answers
1k views

Are there any PCIe SSD cards compatable with OpenIndianna (OpenSolaris) and/or FreeNAS (freebsd) 8+?

Has anyone had any success at all with any PCIx SSD cards around the 200GB+ mark under FreeNAS 8 or OpenIndiana? Specifically either of these platforms because of ZFS support for which we'd be using ...
2
votes
1answer
214 views

Advice for building production 140 disk (420 TB) ZFS zpool [closed]

I have been tasked to build a large zpool for a data recording system. Using ZFS on Linux (0.6.4.2), on CentOS 6.5. Hardware specs: DL380 Gen8 80 GB ram 2x HP HBA H221 2x HP D6000, each with 70x ...
2
votes
2answers
470 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 ...
2
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2answers
3k views

iSCSI: LUNs per target?

My question relates specifically to ZFS/COMSTAR but I assume is generally applicable to any iSCSI system. Should one prefer to create a target for every LUN that you want to expose? Or is it good ...
2
votes
2answers
1k views

Too much free space on FreeNAS - ZFS

I have a FreeNAS server with 3 x 2 To disks in raidz1. I would expect to have about 4 To of space available. When I run zpool list I get: [root@freenas] ~# zpool list NAME SIZE USED AVAIL ...
3
votes
0answers
320 views

zpool import one or more devices is currently unavailable

zfs drives from a FreeNAS that wouldn't power up after a move. Pulled the disks, scrapped the box, now I can't import any pools. I've tried zfs on Linux and freeNAS from shell on my laptop (using usb/...
1
vote
2answers
2k views

Dell PERC 4/DC (PowerEdge 2850) and ZFS

I understand that ZFS prefers to have as much data about the drives as possible, and that the best thing to do is turn off RAID. The hardware environment is a Dell PowerEdge 2850 with PERC 4/DC and ...
0
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0answers
82 views

ZFS - Reconnecting a disconnected but fully intact disk

If a disk gets disconnected from a ZFS array, but the drive itself if totally fine, what happens when you reconnect it? For example, if I have a mirror of 2 drives, if one is disconnected, then ...
1
vote
1answer
149 views

Persistent ESXi iSCSI datastore from guest VM based target? [closed]

I'm in the process of building a home lab environment for Cisco and VMware that will also double as a NAS. The system runs ESXi v6.0 bare metal. Part of my design is that I have a Lenovo TS440 with ...
3
votes
3answers
827 views

Is it safe to boot a linux server from a USB drive?

I have an HP DL360 G7 server I plan to install KVM and ZFS on. The purpose is going to be a lab in a box. I have the 8 drive bays in the front loaded with 4 drives and an SSD (for the ZFS ZIL cache). ...
6
votes
2answers
3k views

Is there a tool for managing FreeBSD jails that knows about ZFS?

ZFS under FreeBSD lets one assign filesystems to a jail, such that an account in the jail with the appropriate privileges can access the filesystem, create new subordinate filesystems, and so forth. ...
4
votes
2answers
2k views

In ZFS, what is the difference between the various zpool versions?

According to this wiki article http://en.wikipedia.org/wiki/ZFS there are a number of zpool implementations out there. For example, OpenSolaris and derivatives are at 28. While FreeBSD 8 appears to ...
0
votes
1answer
430 views

OpenZFS on OSX filesystem dataset performance issue

tl;dr - My ZFS RAIDZ2 array reads at 7.5+ GB/s and writes at 2.0+ GB/s when I specify a bs=128K or greater with dd. OS X is assuming 1K (as per stat -f %k .) and all my is ~300MB/s; dd gives the same ...
3
votes
2answers
188 views

ZFS online disk migration

I'm wondering if ZFS can handle the following. Say I have FreeBSD installed on a zpool with two physical 500GB disks in a mirrored setup. These form the root partition, so only a maximum of 20GB is ...
1
vote
1answer
163 views

ZFS estimated send size much larger than total data size

From zfs send -R -v pool/fs@snap: send from @ to pool/fs@snap estimated size is 6.50T ...but from zpool list: NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT pool 3.62T 2.36T 1.27T ...
9
votes
1answer
785 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 ...
0
votes
1answer
77 views

ZFS: what does it mean if all disks are ONLINE but resilvering takes place?

I have a pool of four raidz1 on Solaris 10, three of which look like this: state: ONLINE status: One or more devices is currently being resilvered. The pool will continue to function, ...
2
votes
2answers
688 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 ...
1
vote
2answers
408 views

zfs error behind LSI raidcontroller

So ZFS is reporting some "read issues", so it would seem that this disk is failing, based on the fact nothing given in the ZFS-8000-9P document reports has occurred we are aware of. These disks are ...
3
votes
2answers
407 views

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 ...
1
vote
1answer
175 views

Can I prevent exportfs from from breaking ZFS sharenfs exports?

I'm using ZFS on Linux as a fileserver running Ubuntu Server 14.04 LTS. The ZFS pool shares a number of datasets using it's sharenfs property. Outside of ZFS there are a few additional NFS shares ...
7
votes
2answers
217 views

Why is ZFS not doing anything with my disk's duff sector?

I was under the impression that if an I/O error occurs during a read from a ZFS pool, two things will happen: The failure will be recorded in either the READ or CKSUM statistic of the relevant ...
1
vote
2answers
192 views

Having trouble mapping solaris drive paths to physical disks

I have a supermicro box with 24 drives in front and 12 drives in back. It's running x86 solaris 10 with zfs. Here is the output of zpool status: NAME STATE READ WRITE ...
0
votes
1answer
154 views

ZFS on USB disks isn't mounted on boot [closed]

I have a ZRAID on two disks on a disk hub connected to the server via USB 3.0. The system is FreeBSD 10.1. Now even though the ZRAID gets imported on boot, it doesn't get mounted. I've set a mount ...
9
votes
7answers
4k views

Anybody have experience with using Nexenta? [closed]

I'm evaluating the Nexenta platform to hopefully one day replace our legacy file servers. I would primarily use it as a CIFS server in an Active Directory environment. Anyone out there have any ...
3
votes
5answers
3k views

Handling XenServer snapshotting and cloning with ZFS SAN

I'm planning on setting up a XenServer machine that uses a NexentaOS/ZFS-based SAN for storage of the Virtual Disk Images (VDIs) through iSCSI. I know I could just setup a big Storage Repository (SR) ...
1
vote
1answer
100 views

Can I “flush and lock” an Oracle database to do a filesystem backup?

I'm using ZFS to take snapshots of running OpenVZ containers. For MySQL databases I can use flush tables with read lock to put them in a flushed & locked state. This will put the underlying files ...
1
vote
0answers
102 views

zfs pools unavailable, disks shared with other pools

My ZFS pool called data do not mount anymore after a shutdown. Maybe there was some automatic update on the computer. I Don't know. zpool status returns no pools available zpool import returns ...
1
vote
2answers
127 views

Can I use ZFS to replicate (fast) EC2 instance store to (slow) EBS store?

I love the idea of using SSD EBS instance stores as L2ARC and ZIL for a zpool backed by EBS. Going further (and into more dangerous territory), could I instead create a zpool mirror with the 2 ...
3
votes
1answer
218 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 ...
0
votes
1answer
90 views

NFS client, ZFS Server ZoL: cat to changed file ends with not found

We get in trouble since an update from our clients from Ubuntu 12.04 to Ubuntu 14.04. The behavior: On client A I change an existing file foo on a nfs share. On client B I do a cat foo. 1st time ...
2
votes
3answers
976 views

Nexenta/OpenSolaris filer kernel panic/crash

I've an x4540 Sun storage server running NexentaStor Enterprise. It's serving NFS over 10GbE CX4 for several VMWare vSphere hosts. There are 30 virtual machines running. For the past few weeks, I've ...
1
vote
1answer
121 views

How much memory is required to send deduplicated ZFS stream?

Last year I set up a pair of servers for my employer, running FreeBSD 10.1 with a large pool of storage in each server. 12 x 2TB disks, in a zpool configured as two raidz2 vdevs of six disks each. One ...
6
votes
3answers
4k 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 ...
1
vote
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 ...
10
votes
4answers
6k 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 ...
1
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0answers
304 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, ...