Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [raidz]

67 questions
2
votes
2 answers

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 2TB per year. I have a Supermicro X6DHE-XB 3U…
John P
  • 1,679
  • 6
  • 38
  • 59
2
votes
2 answers

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 in a RAID5 array, this comes out to be "N-1" for…
Stefan Lasiewski
  • 23,667
  • 41
  • 132
  • 186
2
votes
1 answer

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 files(large files = > 1GiB). The zpool configuration…
user48937
  • 23
  • 5
2
votes
1 answer

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 state: DEGRADED status: One or more devices has…
Brian Thomas
  • 398
  • 3
  • 15
1
vote
0 answers

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 filesystem, and OpenZFS for the data. We have an HBA,…
BurningKrome
  • 525
  • 2
  • 12
  • 22
1
vote
1 answer

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 spa_get_random root@solaris:~# zpool import pool:…
stackelk
  • 19
  • 1
1
vote
2 answers

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 that I have enough room on the root drive to make…
Walter
  • 1,057
  • 7
  • 14
1
vote
1 answer

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 READ WRITE CKSUM raid-5x3 …
Dan
  • 959
  • 5
  • 14
  • 25
1
vote
3 answers

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 work? Edit: Asked about topic on Nexenta forums,…
xddsg
  • 3,392
  • 2
  • 28
  • 33
1
vote
1 answer

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 entire pool so it's size is reported as 913GB but I'm…
Hiro2k
  • 167
  • 2
  • 6
1
vote
1 answer

ZFS - is it safe to remove files served by ZFS during a resilver/rebuild?

I have a Nexenta ZFS system serving a large NFS volume (using ~85% of 250 TB). One of the 70 disks failed over a week ago, and the system is resilvering a hot spare without issues (other than the large performance losses due to the intense…
ascendants
  • 163
  • 6
1
vote
1 answer

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 containing 10+ drives. All was well until.... we…
ALchEmiXt
  • 11
  • 3
0
votes
1 answer

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 mirror I tried configuring raidz1 with four internal…
Megamind
  • 1
  • 1
0
votes
1 answer

Why is the use of ZFS without ECC RAM "not recommended"?

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 the reasoning behind this is. Is this an issue…
Ajedi32
  • 167
  • 1
  • 11
0
votes
0 answers

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 transferred in 31.144059 secs (32108853…
Tony
  • 37
  • 5
1 2 3
4
5