My CAXM 1TB External Hard Drive contains Hitachi HDT721010SLA360 Hard Disk. It's a very good disk for an external hard drive. Check out tomshardware review of Hitachi Deskstar 7K1000.B.
Here are some disk specs from the review: "... HDT721010SLA360, which can be broken down like so: Hitachi Deskstar T-series (HDT), 7,200 RPM (72), maximum family capacity 1 TB (the first 10), actual capacity (the second 10), the generation (S) and Z-height (L stands for 26.1 mm), the interface (3 = SATA/300) and the cache capacity (6 = 16 MB)."
So, it is a 7200 RPM disk with 16 MB cache and quite low idle power consumption - 5.4W, which should make it perfect for eSATA capable DVRs.
It works well with my DirecTV HR22-100 DVR.
The black CAXM measures 7 5/8" x 4 3/8" x 1 1/4" or 193mm/112mm/32mm, it has a power switch (very convenient for a backup disk which is not going to be always on), eSATA and USB 2.0 interfaces, the enclosure is aluminum and it has no cooling fans. The stand is plastic and it is held in place by friction, it's a little flimsy, but does the job.
The disk looks and feels high quality and it is not going to be an eyesore on your desk or next to your DVR.
My disk came with the stand, an eSATA bracket for a desktop, a 100-244V~ 50-60Hz Power adapter with 5' adapter to disk cable (the adapter looks a little different from the one, shown on the product pictures and it measures: 3.5"x2"x1.3", excluding the integrated two prong power plug), a 48" eSATA cable and a 40" USB cable. Very nice package for the price!