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0
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0answers
73 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 ...
2
votes
2answers
260 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 ...
1
vote
1answer
76 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
votes
1answer
535 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 ...
2
votes
2answers
165 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 ...
5
votes
2answers
4k 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: ...
1
vote
2answers
127 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
vote
1answer
301 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 ...
2
votes
1answer
1k 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
votes
1answer
105 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 ...
0
votes
2answers
823 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 ...
0
votes
2answers
8k 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
votes
2answers
132 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
vote
0answers
293 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 ...
2
votes
2answers
714 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
votes
1answer
851 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
votes
3answers
818 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
votes
2answers
4k 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 ...
2
votes
2answers
3k 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
votes
1answer
308 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
votes
1answer
299 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 ...
5
votes
1answer
1k 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
votes
2answers
759 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 ...
3
votes
2answers
9k 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 ...
-1
votes
1answer
280 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 ...
2
votes
3answers
582 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, ...
1
vote
3answers
1k 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
votes
2answers
235 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 ...
4
votes
2answers
9k 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 ...
0
votes
1answer
542 views

Is it possible to use RAID-Z/Z2 and iSCSI on FreeNAS 8

I am trying to configure FreeNas 8 to expose an RAID-Z or RAID-Z2 volume via iSCSI. I have had limited success. If I delete the RAID-Z volume and simply expose a "physical" disk in the iSCSI setup ...
2
votes
2answers
584 views

A few questions about RAID-Z

I just got 3 one terabyte HDDs to put into my small NAS box. I plan on raiding these together with RAID-Z (ZFS, if I'm not mistaken). I've done a lot of research, but there doesn't seem to be very ...
4
votes
4answers
963 views

RAID-Z Failure Notification

I have a FreeBSD file server with a 10TB array in RAID-Z (so 8TB usable with 2TB redundancy). I am trying to figure out how to get the system to notify me, preferably by email, if one of the drives ...
2
votes
2answers
1k views

ZFS mirror or RAID-Z for expandability

I'm building out a FreeNAS based server that will primarily be used to serve up iSCSI disks to Xen virtual machines and dedicated servers. My current data need is for 8TB of space, growing at about ...
1
vote
1answer
2k views

How to backup XenServer VMs on a FreeNAS iSCSI extent

I currently have a FreeNAS server with three 500GB drives setup in a RAIDZ array. It's currently used to serve an iSCSI extent to my Citrix XenServer Pool. When I created the extent I gave it the ...
4
votes
1answer
1k views

RAIDZ vs RAID1+0

Hi guys I just got 4 SSDs for my FreeNAS box. This server is only used to serve a single iSCSI extent to my Citrix XenServer pool and was wondering if I should setup them up in a RAIDZ or a RAID 1+0 ...
13
votes
2answers
21k views

How can I add one disk to an existing raidz zpool?

I have an OpenSolaris server with a zpool backupz comprised of four SCSI drives: -bash-3.2# zpool status backupz pool: backupz state: ONLINE scrub: none requested config: NAME ...
2
votes
2answers
4k views

ZFS: RAIDZ and RAIDZ2 usable size?

Is the usable size of a RAIDZ array similar to the usable size of a RAID5 array? The RAID5 calculation is "(N-1) * S", where S is the size of smallest drive. Since most people use the same sized disk ...
0
votes
1answer
226 views

Possible to write an implement of RAIDZ or RAIDZ2 for the MD driver in the Linux kernel?

I am curious on if it is possible to have an implement of RAIDZ and/or RAIDZ2 in the MD driver in the Linux kernel? From my understanding of it is that the RAIDZ version is equivalent to a RAID 5, ...
4
votes
3answers
727 views

Raidz-1 parity disks?

I am a bit confused about how to configure my zfs pool. What is the exact difference between adding 8 disks to a raidz1 pool or adding 2x4 to the pool with 2 raidz1 groups. Example zpool create ...
1
vote
2answers
2k views

My OpenSolaris Server hangs when writing large files after upgrading zpool

yesterday I added new harddrives(four as a raidz1 and one as hot-spare) to a opensolaris server, after extending the zpool the server hangs when writing large files but not when reading large ...
5
votes
2answers
1k views

ZFS: preparing for future drive additions

I'm about the build a Solaris NAS system, currently we have two drives and are planning on adding two more at a later date (2TB enterprise level HDD are a bit expensive!). Whats the best ...
4
votes
3answers
2k views

ZFS: RAIDZ versus stripe with ditto blocks

I'm going to build a ZFS file server from FreeBSD. I learned recently that I can't expand a RAIDZ udev once it's part of the pool. That's a problem since I'm a home user and will probably add one disk ...
1
vote
2answers
987 views

Upgrade FreeBSD ZFS system to larger drives

I have a FreeBSD system with a 750GB boot drive (UFS boot, ZFS root) and a second data made from a three drive raidz setup. I'd like to swap the three 250GB drives for a trio of 2TB drives. Assuming ...