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    Slow perfomance ZFS and LVM

    Ok, but is it not normal, though? Here are a couple of things to keep in mind: even SSDs are very different. If you are not using enterprise SLC drives or PCIe drives, there is a buffering issue at some point. As the buffer gets full, the speed drops. 30GB sounds like a decent limit; if you...
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    Slow perfomance ZFS and LVM

    @ATX-250, If i were you, i'd look into why EXT4 is ok and ZFS is not. The only significant differences are: (assuming EXT4 is done on a hardware RAID) the hardware setup, meaning how disks are made available to the OS. In this case the controller and drive settings play a major role; VirtIO...
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    [SOLVED] issue with ZFS on HP smart arraw p420i

    Something like this: https://www.ebay.com/itm/HP-579265-001-Mini-SAS-SFF-8087-Cable-Red-70cm/261085369468 or, even better, this: https://www.ebay.com/itm/HP-DUAL-MINI-SAS-SFF-8087-RIBBON-CABLE-FOR-HP-PROLIANT-DL380-G9-747568-001/113014064653
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    Slow perfomance ZFS and LVM

    1) I assume the issue is due to the controllers' cache. This is a familiar behaviour for me - the speed is really fast while the controller manages to fill the cache, but when the cache is full - it cannot push more data onto the RAIDs. I encourage you to try the same experiment with a...
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    how to remove the "no valid subscription" proxmox 5.2.1

    To be honest - the notification itself is very misplaced. I'd even go as far as call it inappropriate. I am not trying to be disrespectful to the project and all the people who are putting the hard work into making Proxmox cooler than VMware, who have Dell behind them and a huge pile of...
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    PROXMOX on R720xd - Home Server Build - Looking for suggestions

    @Psilospiral You don't really need to flash it with anything. It has pass-through out of the box. As for the queue - it's decent enough for backups. Just in case, here's the guide: https://www.vladan.fr/flash-dell-perc-h310-with-it-firmware/ If i were to give an advice, i'd argue that it's...
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    PROXMOX on R720xd - Home Server Build - Looking for suggestions

    @Psilospiral Not sure. Never tried it myself - i simply sold the H710 and got H310. Seems safer and the lack of battery gives me peace of mind (i assume it makes it less likely to fail, although there is no basis for this, just my intuition). As for the Fusion card, you've probably got...
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    PROXMOX on R720xd - Home Server Build - Looking for suggestions

    Hey! Here's a cheatsheet (i'm using it on R620): forget about SD cards. Those are mostly for ESXi. Simply sell them if you need to. The Proxmox OS will kill the cards due to heavy IO. store VMs on a Fusion-io card. Grab one with around 1TB size (should be around $100) and you'll have a quick...
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    During update: Error! Your kernel headers for kernel 4.15.18-16-pve cannot be found.

    As a side note, i've posted a similar topic here: https://forum.proxmox.com/threads/how-to-force-headers-being-installed-with-the-new-kernel.55371/ The error is due to the fact that DKMS tries to compile the modules against the new kernel, but doesn't find the headers. If i understood...
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    ... blocked for 120 sec

    Got something akin of: lzop 1121 blocked for more than 120 sec "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. No idea why. Just confirming that i do get similar weird messages. In my case VMs were not reachable for some time.
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    ... blocked for 120 sec

    Similar situation on the latest kernel.
  12. V

    [SOLVED] issue with ZFS on HP smart arraw p420i

    There may be different HBA controllers out there. I am recommending this one since i have it in my DL360p and i know for a fact that it works. You will need to get new cables, though, as the ones that currently co into the motherboard won't fit into the 2 ports on the HBA, so it's best to get...
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    [SOLVED] How to force headers being installed with the new kernel

    Hello! Occasionally the pve-kernel gets updated. I am using DKMS to compile the drivers for a device when the kernel gets updated. The catch lies in the fact that in order to compile those drivers, kernel headers are necessary and on update are missing. This results in the system becoming...
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    [SOLVED] issue with ZFS on HP smart arraw p420i

    It's either this: https://www.youtube.com/watch?v=JuaezJd4C3I Or this: https://www.ebay.com/itm/372688700758
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    Moving Disk to local from local-lvm in proxmox

    You can back them up on an external storage.
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    [SOLVED] issue with ZFS on HP smart arraw p420i

    Hey! If i understand correctly, you've set the AHCI SATA, but this does not necessarily influence the drives. First of all - are the drives SATA? Secondly - does p420i allow for the drive pass-through? I assume that p420i is not really designed for pass-trough mode. Here's a link that is a...
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    Moving Disk to local from local-lvm in proxmox

    I don't remember exactly, as i've moved to ZFS from ext4 and xfs some time ago, but the issue may be in the fact that local-lvm may report the occupied space equal to the space provisioned. Therefore, it may be the case that no matter how much space you free on the VMs, you'll still get the same...

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