Questions tagged [raidz]

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1answer
47 views

ZFS: edit zpool drive order of failing pool on ubuntu

I am a bit lost in what exactly happened and how to proceed with a recently expanded zfs configuration on Ubuntu 18.04. I have a storage server running smoothly for years using ZFS with 2 pools each ...
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15 views

Easiest way to migrate from FreeNAS raid-z1 pool to raid-z2 pool with added harddrives?

I have a FreeNAS server with 4x8TB disks in a raid-z1 pool. Of the ~24TB of storage space about 15TB are used. I have now 4 additional 8TB disks and would like to go from a 4-disk raid-z1 to an 8-...
2
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1answer
116 views

How does zfs raidz-2 recover from 3 drives down?

Im wondering what happened, how ZFS was able to recover completely, or if my data is still truly in tact. When i came in last-night i saw this to my dismay, then confusion. zpool status pool: san ...
2
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2answers
535 views

ZFS - enable or disable disk cache?

I'm setting up ZFS (through FreeNAS) with RAIDZ1 on a server with 4 x WD Red SATA HDDs (connected through a PERC H330 in HBA mode). The server is hooked to a UPS. For ZFS and in this setup, does it ...
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0answers
21 views

Mount both sides of ZFS mirror to different mountpoints (AKA Glusterfs is choking)

We have two SuperStorage Server 6049PE1CR36L each with 24 - 4TB disks. At the moment we are running Ubuntu 18.04 but this is negotiable if it helps solve our problem. We are using Ext4 as the OS ...
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0answers
43 views

ZFS Raidz2 strange behaviour IOPS vs speed

setup: 32 core server IBM x3850 , 128GB RAM, 12xSSD 1.8TB raidz2. Tested with bonnie++. Command: bonnie++ -u root -d /tank/ -s 257808M -n 10:102400:1024:1024 Scores: read iops: 50k read speed:800 MB/...
2
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1answer
49 views

ZFS 2xRAIDZ2 vs 3xRAIDZ2 iops increase or not

12 hdds - 100MB/s streaming reads and writes and 250 read and write IOPS. When i do 2xRAIDZ2 so there is 2 vdev 6 HDD each the theoretical IOPS will be 500 according to this atricle: https://www....
1
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1answer
80 views

solaris 11.3 / 11.4 crash if zfs pool should be imported

My Solaris 11.3 system had a reboot for whatever reason and since than a zpool is tried to be imported. Assertion failed: range != 0, file ../../../uts/common/fs/zfs/spa_misc.c, line 1326, function ...
2
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1answer
833 views

ZFS Permanant errors dectected in the following files (<0xf49a>:<0x390aff>)

I had to replace one of my hard drives in our storage array and now I'm getting the following message pool: vol0 state: ONLINE status: One or more devices has experienced an error resulting in ...
18
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1answer
5k views

Is RAID-Z on a single hard disk drive stupid?

Obviously, if the entire drive dies, then RAID-Z on a single disk will not help. But what about other types of errors? From my experience, I sometimes have a file that I can not read. On Mac OS&...
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4answers
3k views

write hole: which RAID levels are affected?

In my journey to understanding the advantages of RAIDZ, i came across the concept of write hole. As this page explains, a write hole is the inconsistency you get among the disks of the array, when ...
3
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2answers
4k views

Using exotic setups to maximize capacity (when using different sized disks) in ZFS raidz

I have 2 x 4TB disks and 3 x 6TB disk which I want use with ZFS. My objective is to maximise the usable storage space whilst allowing for a single disk failure. Ideally a raidz setup would be used ...
4
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0answers
501 views

ZFS restarts resilvering over and over again. Also very slow

Here's one of my Solaris 10 servers after a couple of disk replacements in a zpool pool: volume state: ONLINE status: One or more devices is currently being resilvered. The pool will ...
2
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1answer
342 views

zfs convert linear to raidz5 or rebuild

Can i convert my linear span to a raidz-5? I finally have enough hard drives, and dont really want to thrash them about refilling with the backup data that they need to be holding. so currently, ...
4
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1answer
1k views

Ubuntu 14.04 blk_update_request I/O error on same sector across all drives with ZFS

I'm running Ubuntu 14.04 with ZOL version v0.6.5.4: root@box ~# dmesg | egrep "SPL|ZFS" [ 34.430404] SPL: Loaded module v0.6.5.4-1~trusty [ 34.475743] ZFS: Loaded module v0.6.5.4-1~trusty, ZFS ...
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1answer
1k views

ZFS: i/o error - all block copies unavailable

I am trying to install FreeBSD Sparc64 on my SunFire440 machine, I followed the tutorials to Install FreeBSD Root on ZFS using this tutorial link. Only the changes I made is that instead of using ...
4
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1answer
627 views

Drawbacks of a single drive split into partitions and partitions joined into a ZFS raidz1, vs. single drive ZFS with data duplication?

I'm looking for a minimal ZFS setup to achieve self-healing on a single device. Since I back up my data, drive failures are no concern, but bit-rot is. So far, the only suggestions I've been able ...
0
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1answer
813 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
1k 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
92 views

Undo adding disks to a RAID-Z Configuration

I've started running out of space on one of my data pool and decided to expand it by adding some extra disks. Below is what it looked like before extending: NAME STATE ...
3
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2answers
5k views

Inplace migrating ZFS RAIDZ with 3 drives to 4 disks, when pool has more than 1/3 of free space

On creating my RAID-Z pool on ZoL I assumed, I could easily just drop-in additional disks later on. Meanwhile I learned that this is yet not possible. But... I had a similar problem on creating my ...
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0answers
217 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 ...
17
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3answers
73k views

ZFS - Is RAIDZ-1 really that bad?

I have an NAS server with 4x 2TB WD RE4-GP drives in a RAID10 configuration (4TB usable). I'm running out of space (<1TB usable space left). I have $0 to spend on bigger/more drives/enclosures. I ...
2
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1answer
426 views

Touching ZFS volume causing OS to freeze, drives reportedly OK

Having massive issues with 4 brand new 3TB WD Red drives I just got. Trying to setup raidz2 using "native zfs" with all 4 on ubuntu 14.04.1, which works initially until I start trying to copy data ...
8
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1answer
2k 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 ...
3
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2answers
6k views

How can I determine what RAIDZ level my volume is using?

I am looking at a ZFS volume on FreeBSD system, and I have no idea what RAIDZ level it is configured at. How can I find out using the ZFS command line or other? I tried "zpool status" already, and ...
12
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2answers
19k 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: ...
3
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2answers
2k views

Can you add a different size RAIDZ1 to an exists zpool?

For example, I have a 4x2TB RaidZ1 set up right now, but I would like to add only a 3X4TB RaidZ1 in addition to it. Is there a way to do this with zdevs/another Zpool? Thanks
1
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1answer
2k views

Why is my RAIDZ2 pool larger than the expected size calculation?

I'm building a RAIDZ2 ZFS system, using Ubuntu 13.10 as a base system, and zfsonlinux's packages, having 6 disks dedicated to the pool data and a couple of SSD partitions to do ZIL log and L2ARC cache....
5
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2answers
6k 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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1answer
443 views

ZRAID1 pool size bigger than expected

I have 3x 4TB drives for a ZRAID1 config (single parity drive) After running zpool create data zraid1 sdb sdc sdd I have a volume that's 10.9T in size, which is what I would expect from a stripe ...
2
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2answers
3k views

ZFS: 3 devices: what's the difference between mirror and raidz2?

It would seem like with 3 devices, it's possible to configure a ZFS pool with either mirror or raidz2 mode. What's the difference in performance and reliability? (In regards to reliability, I'm ...
6
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2answers
31k views

Expanding a FreeNAS RAIDZ Pool

I am building a ZFS data server using FreeNAS. I have enough hard disk space (4x2TB) for a few years, but if down the road I want to expand this out can i build another 4xHD pool? Would i need ...
0
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2answers
204 views

raidz plus mirror on the same disk different slice in 2 pools

I need a little assistance. I have 6 2TB disks. I'm planning to assign approximately 500GB to my root pool slice 0 mirrored with another disk, since one disk isn't used up I then decided to do a raidz ...
1
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1answer
2k views

Freenas - Expanding volume

We currently have a server with 5x3TB disks configured as a RAIDZ: zpool status pool: raid-5x3 state: ONLINE scrub: none requested config: NAME STATE ...
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2answers
2k 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 ...
2
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1answer
1k views

Zfs Drive config on FreeNas

Couple of related questions. Background: I have a stock of drives lying about that I want to use in a HP Proliant Microserver which has a 4 slot SAS cage with FreeNas. I don't want to spend any more ...
7
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3answers
2k views

How ZFS handles online replacement in a RAID-Z (theoretical)

This is a somewhat theoretical question about ZFS and RAID-Z. I'll use a three disk single-parity array as an example for clarity, but the problem can be extended to any number of disks and any ...
4
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2answers
10k views

What is a “hot spare” on FreeNAS?

What is a "hot spare" with regard to ZFS RAIDZ on FreeNAS? I'm hoping that it means an extra, attached disk that can automatically take over for a failed disk in the RAID ... ? If so, how do I set ...
3
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2answers
8k views

FreeNAS confusion: not sure what happened. raidz1 “DEGRADED”, disk “FAULTED”

Sorry for the long narrative, but I'm thoroughly confused. I'm using FreeNAS-8.0.4-RELEASE-p2-x64 (11367) on a box with 5x3TB SATA disks configured as a raidz volume. A few days ago, the console ...
0
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1answer
609 views

FreeNAS: How to increase scrub 'threshold'?

My NAS box is set to default scrub threshold every 35 days. How do I change it to scrub every Saturday night? Do I need to create a cron job? I'm on FreeNAS-8.0.4-RELEASE-p2-x64 (11367)
3
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1answer
374 views

6* HDD ,2*SSD, Freebsd, Raidz2 or hardware R6? [duplicate]

Possible Duplicate: Does ZFS replace the need for hardware/software RAID? I want to install Freebsd 9 on our servers. We have 6 HDD and 2SDD. SDD will be used for database. For now we're planning ...
5
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1answer
3k views

Raidz in FreeNAS eating more space than expected

I just got 6 new 2TB drives, and added them to my FreeNAS box. I have only dealt with RAID1 previously, and each setup has given what I was expecting. However, with the 6*2TB drives, I wanted to ...
2
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2answers
2k views

is zfs disk rotting protection automatic and built in?

some presentation declares that zfs has: zfs can detect and correct silent data corruption. e.g. from here http://www.eecis.udel.edu/~bmiller/DE-OSUG/ECECIS-ZFS.pdf But do you need to allocate ...
5
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2answers
20k views

grow/shrink a zfs RAIDZ

I'm going to build a freenas server, would like to make sure what I can do with such magical and advanced zfs. If I have 5 * 3TB disks in RAIDZ (12TB storage in total), now I am trying to add another ...
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1answer
369 views

setting up expandable raidz

I heard you can expand a raidz if you add one with the exact same setting. So is it true that I can build a raid-2z now using 4 disks (so I have 2+2) and later on add another 4 disks so I have a raid-...
5
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3answers
2k views

ZFS, raidz1: Why is the volume size (42T) so much smaller than the pool size (50T)?

I have a pool of 28 2TB-disks (56T) in 4 arrays of 7 disks. Since it's raidz1 (~RAID5), I'd expect 1 disk to be used for parity in each array, so the resulting volume should be 2TB*4*(7-1)=48TB, right?...
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3answers
4k views

Undelete ZFS file shared by Samba

A user deleted a directory containing an important file over a Samba share. Share was from a Nexenta box running ZFS, raid-Z3. Last backup was 12 hours ago - is there a way to recover the 1 day's ...
2
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2answers
276 views

ZFS - setting physical disk start point of pool/filesystem

I'm testing harddisk performance, and would like to test writing to the outer tracks of my harddisk with ZFS. One way of doing this would be to create a pool/filesystem with a start point just a few ...
7
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3answers
22k views

How do I recover from a faulted zpool where one device is OK, but was temporarily offline?

I have a zpool with 4 2TB USB disks in a raidz config: [root@chef /mnt/Chef]# zpool status farcryz1 pool: farcryz1 state: ONLINE scrub: none requested config: NAME STATE READ ...