During the mount, use this sync interval(SYNC):
How long do you want the mount operation to wait before hardening meta data? Specify the number of seconds used as a default for the sync daemon interval. When the sync daemon is active, the meta data for a file system is hardened. Specifying the value 0 indicates that the file system should harden meta data synchronously with syscall requests. (Note that a value of 0 causes the system to perform more slowly.) The maximum value that can be specified for t is 65535. The default is 60 seconds.
Sync interval values are rounded up to the next 30-second value. For example, specifying 31 seconds results in a sync interval of 60 seconds.
Do not protect this file system from being mounted in read-write mode by multiple file systems simultaneously (NOWRITEPROTECT)
Do you want to protect this file system from being mounted in read-write mode by multiple file systems simultaneously? The default is WRITEPROTECT. Use NOWRITEPROTECT only when there is no possibility of the file system being mounted by multiple systems. When NOWRITEPROTECT is specified, the file system is 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.
NOWRITEPROTECT is the default, meaning that the box is unchecked and the file system is not protected from being mounted in read-write by multiple systems simultaneously.