CoW - Copy on Write. Most probably on older mainframes. ( Actually newer mainframes ). "CoW is used as the underlying mechanism in file systems like ZFS, Btrfs

CoW - Copy on Write. Most probably on older mainframes. ( Actually newer mainframes ). "CoW is used as the underlying mechanism in file systems like ZFS, Btrfs, ReFS, and Bcachefs" Obligatory: https://en.wikipedia.org/wiki/Copy-on-write https://en.wikipedia.org/wiki/Copy-on-write