Recent content by Shadow2091

With depth=1 and direct=1 ~5.2GB/s read

Hello. I assembled mdadm raid0 from two Samsung 970 Evo plus NVMe SSDs, created an LVM VG on it and gave the thick LV as a virtual machine disk based on Centos8. On a hypervisor, this RAID delivers about 7GB/s read performance. When I test inside the guest OS with: fio --readonly --name=onessd...

In my case, the problem was solved after enabling disk zeroing.

Checked with the latest kernel version - the VM still breaks if you remove the mounted USB drive

Guys, raidz2 on 4 devices? Seriously? And what is its advantage over the R10 in this configuration? =) IMHO, zfs is dead at the moment under Linux. It reduces the performance of enterprise ssd and even NVME at times, and sometimes by tens of times. It works worse on a consumer class HDD than...

Software Raid5 with mdadm?

Yes, I always use cloning from a template

I also found out that the problem manifests itself exclusively with full cloning, linked-clone always works correctly.

I confirm, the problem is present.

Yes, I faced the same problem as you. VM freezes if you pull out the USB device that the OS is accessing. Everything used to work fine before. The only way that I have found so far is to correctly stop the call and disconnect the device from inside the guest system.

I use LVM-thin as the main storage and have repeatedly noticed that cloning VMs or recovering using proxmox often means that the VM is broken if LVM-thin is used as the target storage. In Windows 10, this means that after cloning, the VM boots only in recovery mode and does not see a drives...

Well, changing the record block size to 256k in the Proxmox settings gave an increase in VM speed to 140-200Mb/s. The reason was this. But still, it is half the size of the drives on the host. I continue to dig.

Yep. As far as I understand, this is not a mirror, but an analog of RAID5 with parity.

Good afternoon. I ask for help. Installation: Proxmox 6, Xeon 2665, 128Gb REG ECC RAM, ZFS, 16Gb ARC, 4 x 600Gb Enterprise 10kSAS HDD in RAIDZ-1. root@virt:/mnt/zfs/RZHDD/vmstore# zpool status -v pool: RZHDD state: ONLINE scan: none requested config: NAME...