QPort

I've asked the below questions (in blue) to Hikvision and got the answers in red. But it seems odd that I cannot mirror to an eSATA HDD. Although the answer form Hikvision says I must use an internal HDD for mirror recording I Know that it is possible to do what I want with other brands - Conceptronic NVR C8CHIPSKIT Manual says: "Record Mode External HDD Mode Click to select one of the following: Extended REC: NVR recording data into internal HDD first, when it record to 100%, it’ll record to external HDD. Mirror: NVR recording data into both internal and external HDD at the same time." Does anyone with a Hikvision NVR supporting RAID1 know the answer to my questions? 1) When recording to an eSATA HDD, that would be located in a hidden place, do I need to have an internal HDD, or can the NVR work only connected to the eSATA HDD? For security reasons; you need to have add it inside of the recorder an HDD and 1 E-SATA interface for high speed backup So, the only purpose for eSATA is Backup? 2) If using a NVR that supports RAID1, can the mirror footage be in the eSATA HDD, or does it have to be in another internal HDD? Internal HDD Thank you.