The speed of the disks is very small why?

Question

Debian

Hello! Well, honestly, I’m having some kind of nightmare, I can’t figure out the measurements, some tests show 300-400 MB somewhere no higher than 30 on an SSD.
I have ProxMox installed as a host virtual machine on it. I test everything from the host machine.
For example
sync; dd if=/dev/zero of=/mnt/sd0p1 bs=1M count=1024; sync

while creating a software raid array of two disks, the synchronization speed was as follows.
Larger than
md0 This is an array of two SSD disks
md0p1 is an ext4 partition on a raid device
And also tell me where those indicators rest in atop that is highlighted in red.
Next
I connect the storage to ProxMox
as a directory /mnt/md0p1
I add a disk on it: size 10g, no cache, virtio .qcow2 Virtual machine with
Windows, all the drivers are installed, initialize the disk, and start copying the base to the disk it has a system (debian proxmox) We continue monitoring Next I connect the storage in ProxMox as the directory /mnt/md0p1 I add a disk on it: size 10g, no cache, virtio .raw Virtual machine with Windows, drivers are all installed, initialize the disk, and start copying to disk base This is what I see (Start of copying) Larger Middle of observation Larger AND End Please look at this more carefully




Larger
Everything ran out of memory again, again everything was cached and the speed fell already without that.
What to do, how to be, what kind of disgrace it is and how speed is generally measured without a cache, and also how to run virtual machines on Winde on HueProxMox with adequate write speed to disk (Not fake speed to disk when they showed 500 1000 mb and everything falls into the cache but real)
Info on disks only such ladies, smart does not work.
/opt/adaptec/arcconf

Answer 1

If you want a performance, then connect it as a Rav disk virtio and install the drivers in Windows