Advanced disk format

[SergeyV]

Hello,

Is it possible to create virtual hard drives in "Advanced Format", which sector size is 4kB?

Thanks!

 

[dietmar]

AFAIK kvm always use 512b sectors.

 

[SergeyV]

Thank you!

 

[spirit]

it's possible to pass block size in command line, but I never try it.

-device virtio-blk-pci,logical_block_size=4096,physical_block_size=4096

 

[SergeyV]

Dietmar, Spirit, thank you!

 

[hvisage]

it's possible to pass block size in command line, but I never try it.

 -device virtio-blk-pci,logical_block_size=4096,physical_block_size=4096

Now the question: How can we have this added in the .conf file of proxmox to have VMs using that? I'm tracking performance issues to the disks that only makes sense looking at 4Kb sectors vs the 512b that the KVM uses.