Questions tagged [raid-z]
22 questions
35
votes
6 answers
ZFS Beginner Setup with Different Size Drives
Sorry for the noobie questions, I've been Googling all sorts of walkthroughs to create my ZFS raid, but I can't seem to find the correct links for the answers I'm looking for.
This is my first attempt for a RAID, and from all I've read, it seems…
ivandov
- 463
28
votes
11 answers
Is ZFS and RAID-Z worth using in home made NAS (freeNAS for example)
Features of ZFS and RAID-Z look vary promising. Looks like it is a perfect FS for home NAS solutions, poor man's Drobo things and alike.
Are there any drawbacks I should be aware of?
Kamil Zadora
- 867
14
votes
5 answers
Start a ZFS RAIDZ zpool with two discs then add a third?
Let's say I have two 2TB HDDs and I want to start my first ZFS zpool. Is it possible to create a RAIDZ with just those two discs, giving me 2TB of usable storage (if I understand it right) and then later add another 2TB HDD bringing the total to 4TB…
Doug S.
7
votes
2 answers
How to add an additional drive to an existing ZFS RAIDZ-1 in Proxmox?
I've a ZFS installation in Proxmox, in particular a RAIDZ-1 file system, for testing purposes (before going on production with this setup) I've added a new drive to the machine, but I'm blocked on this point... What's the command to add the new…
4
votes
1 answer
ZFS Hard Drive Configuration in FreeNAS
I've been messing around with FreeNAS installed on a USB Flash Drive for a week or so, just testing all the services and possible hard drive configurations utilizing ZFS. It's a pretty neat setup but it's finally time to create a permanent zpool.…
lyrikles
- 151
4
votes
2 answers
Create a zfs raidz2 with 4k disks
I want to create a zfs raidz2 with 4 disks. I know this will "waste" at least 50% of the space but I aim at a high tolerance against disk failures. Using 5 disks for raidz2 is not recommended and 6 disks is to expensive and unnecessary for me. I…
masgo
- 2,324
2
votes
1 answer
Is it a bad idea to have one of multiple partitions of an ssd as cache in a raidz2 setup?
I'm setting up a system with 5 HDD's in RAIDZ2 and one SSD where the OS goes. I'm considering partitioning the system drive (the SSD) to set the free partition of the SSD as a cache in the RAIDZ2. I've heard a lot of good things about SSD cache in…
lindhe
- 245
2
votes
3 answers
ZFS raidz2 performance issues read/write speeds on Freenas
I'm having some performance issues on my home backup FreeNas box using a raidz2 configuration and I am wondering what might be causing it (not enough processing power, eco drives?).
It's running:
Freenas 8.3.1
ASUS E35M1-I (Hudson M1)
8GB ram…
holden
- 149
2
votes
0 answers
How to decrypt, create, and mount LUKS encrypted zfs raidz pool at startup?
I have an Ubuntu-18.04 box running the OS off an SSD which I do NOT want to encrypt. I have 3 additional 2TB drives which I would like to use as encrypted (via LUKS) RAID-Z1 additional storage. I would like to use a different phassphrase for each…
PhiloEpisteme
- 121
2
votes
1 answer
Optimal ZFS Pool configuration for a home NAS
I am looking to upgrade my home NAS, which I use to store movies (with Plex Media Server), pictures and backups.
Currently, it has 5 3TB disks in a raidz1 pool.
I was limited by the number of SATA ports, but with the aquisition of a 8-port…
Stéphane Goetz
- 123
2
votes
1 answer
Adding a parity drive to a RAID-Z1 array
Can I create an array as a RAID-Z1 and then later add another pairity drive to make it into a RAID-Z2?
I’ve got 4TB of data on a drive I’d like to add into an array that I’m building out of fresh drives, and it’d be nice to not have to move that…
chrismetcalf
- 131
2
votes
0 answers
Import zpool with one unknown missing vdev_children.
My raid-z zpool was in degraded mode, I have added a new disk in the zpool with the command:
zpool add -f uhuru-test da3
The problem is that da3 have been accidentaly erased and now uhuru-test pool is not anymore seen by the system.
I have seen in…
Boina-n
- 21
1
vote
1 answer
FreeNAS 8.2.x - IDE vmware drive detected as multipath and causing errors
First of all I had FreeNAS 7 running as dedicated on HP Microserver, then upgraded to 8 upgrading my pool as well (4x1TB RaidZ)
Since I upgraded to FreeNAS 8 I had this message popping up. it meant but today it just bugged me to death and I wanted…
Piotr Kula
- 3,743
1
vote
0 answers
How to connect additional drives to HBA controller?
I have a HBA 330 IT controller which has 2x4 12 Gbit/s SAS (or 6 Gbit/s SATA) ports, available through two SFF-8643 mini-SAS connectors. Though it has only 8 ports, it can aparently support up to 32 drives. I wonder, how would I connect more than 8…
1
vote
1 answer
Grow ZFS RAID-Z[123] without degradation?
I know that on ZFS, the only way to grow a RAID-Z (or RAID-Z2 or RAID-Z3) vdev is to replace the disks with larger ones; there is no way to change the geometry. However, is it possible to do so without degrading the array in the process?
As an…
cp.engr
- 242