Protect a file system from being mounted in read-write mode by multiple file systems simultaneously (WRITEPROTECT)

Do you want to protect the file systems from being mounted in read-write mode by multiple file systems simultaneously?

WRITEPROTECT is the default, meaning that the box is checked, and the file system is protected from being mounted in read-write by multiple systems simultaneously.

When NOWRITEPROTECT is specified, the file systems are not protected from being read-write mounted by multiple systems simultaneously. Read/write mounting by multiple systems corrupts the file system. Use of the NOWRITEPROTECT keyword avoids an additional file system read operation that is required at Sync time to support the WRITEPROTECT function. Use NOWRITEPROTECT only when there is no possibility of the file system being mounted by multiple systems.

This sets the WRITEPROTECT|NOWRITEPROTECT parameter (PARM) on the FILESYSTYPE TYPE (HFS) statement in the BPXPRMxx member.