1. M

    Prevent or reduce frequency of txg_sync

    I have a small server (Debian Buster) containing 2 WD RED hard disk which I have encrypted with LUKS and on which I set up a ZFS datapool with RAID 1. As the server is not used to frequently I have created a autoshutdown script which checks for services etc. and if the data drives are active...
  2. gb00s

    EU (SOLD) >> 3.2TB - Fusion ioMemory™ / Sandisk SX350 PCIe (very low usage)

    I'm selling a 3.2TB barely used Sandisk SX350. Current vsl-iomemory4 drivers are available from Snuf's GitHub repository. Got it running in Debian (Proxmox), Gentoo and even Arch Linux. The cards are traded on eBay for >500EUR even with high usage. Due to its very low usage, I'm asking for 399...
  3. D

    Zpool on sparse files

    Hi everyone! I have an NFS share, where I'm planning to store my backups. I created a raidz2 zpool on 7 sparse files on that NFS share and transferred snapshots using syncoid to that zpool. It seems to me that it's a working solution, but I haven't done that before and wanted to hear your...
  4. G

    ZFS on centos rapid SATA drive failures

    I have a system that's on a supermicro with several jbods. It was all 4TB SAS, but put in 8TB SATA. It has had more drives fault in 6 months than in my 20 years in storage. I am an enterprise storage guy, NetApp etc. This was dropped in my lap and I can't figure out why this is happening. Any...
  5. G

    Snaps are broken after restarting ubuntu 20.04 on zfs

    Hi, I’ve been using snap for at least over a year now without any problems and it was great. Recently I decided to reinstall my system to ubuntu 20.04 but with ZFS as a file system. Since then I have weird problems with snap. After a restart I cannot launch any of my applications installed via...
  6. D

    Optimize Write Amplification (ZoL, Proxmox)

    Hi, I've setup a Proxmox-Hypervisor and got a total write amplification of around 18 from VM to NAND flash. Can someone hint me how to improve this? Server setup: Supermicro X10SRM-F, Xeon E5-2620v4, 64GB DDR4 2133 ECC root drives: 2x Intel S3700 100GB (sda/sdb, LBA=4k) mirrored with mdraid...
  7. J

    quickest method to clone zfs snapshot to a new zvol?

    I have a ZoL system (0.7.9-1) with 3 pools: VMdata: Main pool with zvols for VMs (proxmox), daily snapshots running here Backup: Backup pool where snapshots get replicated (Sanoid) Pool3: Other empty pool There are a couple of zvol that I want to access in the entirety from a few days back...
  8. sboesch

    TrueNAS Beta 2 is working great!

    I installed Beta 2 on one of my servers, it has dual E5-2620 v3 CPUs, and 128GiB of RAM. I have 8x 4TB rust disks in a pool, and two 2TB SSDs in a pool. I have identical speeds and performance as I did with ZOL on Debian Buster. My previous experience with TrueNAS Beta 1 was not so hot, I...
  9. J

    Why mount zfs dataset?

    The Oracle Docs illustrate mounting a zfs dataset under /export/dataset.... I might be missing something, but, why mount it? If you're doing an NFS export, why not just export /pool/dataset?
  10. gb00s

    iXsystems next Open Source Project - TrueNAS SCALE >> Debian Linux

    Link: Starting our next Open Source Project - TrueNAS SCALE
  11. vl1969

    [solved]Zfs on Linux Bootable rpool setup(Proxmox 5.3)

    Hi everyone, Haven't been here for a while. Have a strange question , maybe? I have a Proxmox 5.4 server setup on ZFS. The setup is as follows: A system is on 2 SSD in mirrored pool And around 16 HDDs of various sizes in mirrored pools based on disks size. Like I have a pool with 2T disks. A...
  12. N

    Drives Missing When HBA is Moved To Another PCIe Slot

    Hi, I have several drives connected to a AsRock X470D4U motherboard (3 PCIe slots) using HP H220 HBA (MPT2BIOS-, IT mode) and SuperMicro BPN-SAS-216A backplane. The drives are configured into a ZFS array in Ubuntu 19.10, and `lsblk` and `zpool status` both shows all the drives as...
  13. W

    Disappointing ZFS read performance on 2 x 6 RaidZ2 and quest for bottleneck(s)

    Hi! After spending a lot of time reading valuable sources such as STH, I spent the last 3 months slowly incubating my new file server. I am unfortunately quite disappointed by the performance of the resulting system. I apologize for the long post, but I will try to give all relevant info that...
  14. 3

    Off site 2 way sync, dissimilar OS

    Hi guys, I'm trying to identify a good method of conducting a 2 way sync between a ZFS (OmiOS) array and a remote windows owned hardware array. Both have nfs and samba shares. The arays are around 20TB in size with 16TB utilization. Please don't tell me to switch the hardware windows machine...
  15. Z

    Supermicro SAS backplate, LSA 2208 and working with ZFS

    Hello and Happy New Year to Everyone, I'm going to put my hands on supermicro hardware to make a virtualization server, and I have a question regarding proper using it for ZFS. So first the hardware: motherboard: X9DRH-7TF Supermicro | Products | Motherboards | Xeon® Boards | X9DRH-7TF it...
  16. D

    Check efficiency of lz4 compression in ZFS

    Hi, is it possible to see the real space usage of a file in ZFS when e.g. lz4 compression is enabled? When I do a ls -l of a folder it looks like it shows the non-compressed size (or compression is completely ineffective for those files) though. Anyone already hampered with that kind of stuff...
  17. D

    rsync or cp creates trivial ACLs on the destination

    Is there a way to suppress this? I mean so far as I see these (almost full rights for owner@, read_attr_set for group@ and everyone@) they will not really hamper with anything but with a bit of OCD that looks horrible in my neat designed group-based ACLs. Copying data onto the folders via...
  18. Q

    R820 / H310 "Adapter at Baseport is not responding"

    I posted this on Dell's community as well but no responses as yet. So I think I have a serious problem that I need any help I can get. I don't know if the H310, the SAS cables, the enclosure, or the drives are bad. I will explain. I purchased a re-purposed R820 with an H310 and 10 1TB...
  19. D

    Checking complete disks for errors in OmniOS

    Hi, I just upgraded my server rack with a few more drives, now as 12TB per disk is a lot of space I wanted to check them thoroughly for errors before actually using them. On windows I know of several tools to do that but have no experience/idea for Solaris/OmniOS. What do you usually do for...
  20. A

    SOLVED: duplicated zpool via send/recv, disk usage appears to be incorrect

    Solution in post two. TL;DR: it was the compression (which is, of course, almost perfect on a file filled with zeros). I'm trying to find a way to create duplicate zvols (e.g., from a gold VM) without using cloning, which would cause a dependency issue (I'd rather be able to delete the parent...