Hello,
I read the virtual disk type doc Virtual Disk Types .
It says this "Sparse disks employ the copy-on-write (COW) mechanism, in which virtual disk contains no data in places, until copied there by a write. This optimization saves storage space."
If I write some thing to disk for multiple times, so according to "copied there (to the disk) by a write", the disk will maintain several copies of previous disk data.
The storage will have duplicated old data, so why it says "This optimization saves storage space." ?
anyone can tell me why? thanks in advance.
