[PVE-User] Query disk usage

Marco Gaiarin gaio at sv.lnf.it
Wed Mar 8 11:31:54 CET 2017


Mandi! Marcus
  In chel di` si favelave...

> To make this work you have to activate "discard" option in proxmox per
> harddisk, set bus to "scsi" and use virtio-scsci as controller.
> I use XFS only, but ext4 provides discard also.

Two question.

1) switching from VirtIO to SCSI-VirtIO mean that /dev/vda became
 /dev/sda, right? So i have to keep into account for initrd and so on,
right?

2) also 'VirtIO' (plain) have the 'discard' box thickable. Why?


I've found:
	https://pve.proxmox.com/wiki/Qemu_trim/discard_and_virtio_scsi

but there's some data about performance loss (i think) enabling
discard?


Thanks.

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