tesc_cctvpro 0 Posted November 3, 2010 One of my customers relates that a DVR, which they have seen, offers a function to connect an external hard drive via the serial port on the DVR. This feature allows the external hard drive to mirror the internal drive. (It is not a backup feature). The external drive can be accessed by the dvr as if it was internal, should the internal drive suffer malfunction. In South Africa theft and malicious damage of the DVR is common. Anybody know which dvr we are talking about ? Or another DVR which offers a redundancy feature like this? Share this post Link to post Share on other sites