Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [raidz]

67 questions
5
votes
3 answers

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 a year tops. But what if I set copies=3 against…
RandomInsano
  • 451
  • 1
  • 5
  • 19
5
votes
0 answers

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 continue to function, possibly in a degraded…
Pavel
  • 1,038
  • 1
  • 11
  • 30
5
votes
2 answers

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 that up?
Dan
  • 959
  • 5
  • 14
  • 25
5
votes
1 answer

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 maximize the space available, so I went with raidz.…
swood
  • 53
  • 1
  • 5
4
votes
1 answer

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 pool version 5000, ZFS filesystem version 5 ZFS is…
dymk
  • 41
  • 2
4
votes
1 answer

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 dredge up pointed to the copies=2 option, but that…
bz9js
  • 41
  • 4
4
votes
2 answers

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 got this: TANK …
7wp
  • 564
  • 2
  • 8
  • 18
4
votes
1 answer

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 configuration, not a RAID5 configuration. zpool…
Goro
  • 664
  • 3
  • 9
  • 18
4
votes
1 answer

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 configuration. This isn't used for anything in…
Hiro2k
  • 167
  • 2
  • 6
4
votes
3 answers

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 testPool raidz1 d1 d2 d3 d4 raidz1 d5 d6 d7 d8 zpool…
Chris
  • 607
  • 1
  • 7
  • 18
3
votes
2 answers

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 however from my research, different size drives…
Greg
  • 1,657
  • 5
  • 27
  • 38
3
votes
2 answers

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 with ZFS I'd like to point out that I know it's…
JRoughan
  • 131
  • 3
3
votes
1 answer

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 READ WRITE CKSUM data …
user124381
  • 43
  • 3
3
votes
2 answers

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 initial pool. Only 4 free SATA ports, but an old…
bentolor
  • 141
  • 1
  • 9
3
votes
2 answers

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
user204020
  • 131
  • 1
  • 2
1
2
3 4 5