/vz partition is located on a storage LUN device or SSD disk. It is mounted with ext4
discard option. However it is impossible to trim it, the following error is observed:
[root@vz ~]# fstrim /vz/private/ fstrim: /vz/private/: FITRIM ioctl failed: Operation not supported
The underlying block device does not support the discard operation:
[root@vz ~]$ cat /sys/block/sda/queue/discard_max_bytes 0
Make sure that
ext4 file system is used - at present, ext4 is the only fully supported file system that supports
Contact the storage vendor for clarifications.