|reply to teddystacker |
Re: [DVR] External DVR Storage
You can attempt to use an external hard drive that is not on the "approved list" however you will only be able to use the eSATA port on the DVR due to copyright protection being in place to prevent offloading recordings to other locations through the firewire and usb ports. The reason why there is an approved list is because although it may be possible to attach a regular desktop hard drive to a SATA to eSATA cable and power supply, the hard drives that are used internally and in these DVR Expander cases are designed specifically for audio and video recording, playback, and 24/7 buffering since DVR's rarely- if ever- actually turn off but instead stay in a "standby mode" even when the power button is pressed and no video is displayed on screen (as opposed to the SARA internal and external hard drive spin-down feature that would occur on Cisco/SA DVR's at 1:15am every morning prior to the S25 software update) This constant activity can cause typical desktop hard drives to fail at a faster rate, especially in the very warm to hot environments that these DVR's may be subjected to, thus causing loss or corruption of recordings.
I'm currently using both a 1TB Western Digital My Book AV DVR Expander »www.wdc.com/en/products/products.aspx?id=360 on one DVR and a 1TB Seagate DVR Expander »www.seagate.com/external-hard-dr···xpander/ on another and both work equally fine. In fact what's interesting is that these external hard drives are the exact same brand and AV family used internally in the DVR's themselves.
You do not lose any recordings that are already located on the DVR, you will still be able to access and view them. Once the external hard drive is attached it can act as one large hard drive spread across both drives equally so it can compensate for live recordings that may run over the allotted timeslot, such as if the internal drive has only enough space for 2 hours of a scheduled 3 hour sporting event and the game goes into overtime that lasts four hours it will spread the recording over both drives. However it also will balance recordings over either drive based on which drive has the space at the time of scheduling the recording as what jblues said. The only drawback I've found is that if either drive fails (or the external drive is detached/lost power) the recordings on either drive may not be able to be viewed. This has happened to me when the internal drive started to fail and all recordings were lost, by which I mean they still showed up in the "My DVR" listing but when I went to play them only a black screen appeared with no audio.
Also a heads up for those looking to purchase the Western Digital My Book AV DVR expander, BestBuy and other retailers are selling it at a cheaper price then $129.99 such as $99.99 currently at BestBuy.com »www.bestbuy.com/site/WD+-+My+Boo···p=1&lp=1
I'm always up for a good chat and helping with VoIP testing so my contact info is below.
Gigaset.net: Michael Wolf
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