I'm thinking of upgrading my hr-21 to a 1TB drive for the upcoming free preview, and just wanted to know approximately how many hours of HD does 1TB hold?
It depends on what the recordings are. Figure 140-150 hours for heavy duty content like action movies, and perhaps as much as 225-250 hours for lower resolution animated HD content.
I'm going to be installing a WD "green" 1TB drive internally... anyone know if this drive is compatible in the hr-21-100?
An interesting and perhaps contentious solution. These drives are very popular with HR upgraders but I had some issues with them. If you're using the GP-AV model of this drive I think you'll have better luck. The non AV version may not work for your usage profile or with future software releases.
The difference between the AV models and the non AV models is mostly that the AV model partitions the disks hardware cache for multiple read/write streams and the drive will give up on a bad read operation a lot quicker than a non AV drive.
For many uses in many usage models, the benefits of the AV model wont be readily apparent. Or funny little problems that never get connected back to the disk drive model will show up from time to time.
I've noted with interest that Directv and Tivo only put AV model disk drives in their boxes, that Tivo's only approved external storage solution has an AV drive in it, and that Directv's upcoming supported external drives contain AV model disks.
You know they arent paying an extra $5 a receiver for a fancier disk drive unless its necessary...or will be.
My suggestions for an internal drive are the Western Digital AV-GP line, or the Seagate Pipeline. For an external, the 1GB WD DVR Expander or the Seagate Showcase. Alternatively an Antec MX-1 with one of the mentioned internal drives.
Might cost you an extra $20-40, but that might be worth it vs having a bunch of weird problems over a 2 year period or losing a TB of recordings.