There are 4 mac time codes for linux ext2:
- M -- modified
- A -- accessed
- C -- created
- B -- n/a
How can one be "n/a"? What does it mean?
This just means there is no equivalent for the
C does not mean created. Unix traditionally stores three timestamps for each file:
The ctime is not a creation time. In fact, the ctime is always at least as recent as the modification time. On most unix systems, it is impossible to set the ctime to an arbitrary value, except by bypassing the filesystem and modifying the bits on the disk directly; the ctime is only ever set to the current system time.
Some filesystems have a notion of file creation time. In unix circles, this is generally known as the birth time. A word other than “creation” was chosen because the initial
Ext2 and UFS have only traditional unix features; they do not store a birth time. FAT32 and NTFS are Windows filesystems; they have a birth time (called creation time), but nothing exactly like ctime (NTFS has something close).
"n/a" means "not available"
So it is saying that there is no "B" time code in an ext2 filesystem.