I am doing snapshots on an LVM Volume. It works, but since a few minutes I do get a warning message.

The command is:

sudo lvcreate -s /dev/$VG/$LV -n $SNAP_NAME $VS 2>>$LOG

The VG has enough space for a new LV. However the system issues a warning:

Reducing COW size 30.00 GiB down to maximum usable size 24.10 GiB

What does it mean, and why is this suddendly apearing?


Just found the reason. COW means (copy on write) and indicates that the lv volume size is 24G but the snapshot command used creates 30G.

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