This DisplayString reports the disk space actually available for use, per 'Disk available free space,' which can differ from diskFreeTotal if some space is reserved (e.g., for root/superuser use on Unix-like filesystems) and thus not available to normal write operations. This distinction matters because a Check Point logging process writing as a non-privileged account could hit an out-of-space error even while diskFreeTotal still shows some free capacity, since that remaining space is reserved. An admin seeing logging failures despite diskFreeTotal reporting nonzero free space should check this available figure specifically, since it may be effectively zero.