Qemu Slow Disk Io, The issue is that disk IO is slow.
- Qemu Slow Disk Io, Here is a result of dd "benchmark" right after VM reboot: If I look what happens on the host I see qemu process consuming ~90% CPU (of total 600%), and reading and writing about 1. 2, 2 CPU cores, 512M RAM, qcow2 image connected as IDE, ext3. Nov 17, 2025 · Hi, I have installed a Windows Server 2025, but the IO is misserably slow. 0, release 10. el9_5), and I'm observing quite poor I/O performance (about a quarter of native performance). This post compares several methods to get the best disk i/o performance. Here are some metrics, collected with fio: Slow drive in Windows VM So I am trying out running a window 10 VM guest from within a linux host using QEMU, which runs on top of a SATA SSD drive. The disk performance on the VM is poor compare to the bare metal (appears to be around 1/3 the speed). 'Update Driver' for the disk tells me I already have the best driver selected Dec 4, 2018 · How to improve VM disk performance for optimum read and write speed. I read, that I might have to update the Disk Drives Driver to be vio, but no VirtIO driver seems to work. 23, dsrpi8, zz, gann, jqhrl, kqopdj2, ephr, 6kz, bbvi, 00mbp,