I had purchased a Fantom 1.5 TB Green drive for my Cablevision HD8300 - Plugged it in , it formatted correctly tested fine ...
Went on vacation and returned to a drive not recognized message- dozens of 'black recordings", inability to pause etc.....
I read a lot here -and tried everything. Several reformats and similar results.
After aprrox 10-12 % full with the new drive - the system would beging to fail - more black recordings - inability to pauseand continue etc.
I removed the Green drive from the fantom case as I thought the Spindle speed of 5900 RPMS could be the issue (Cablevision tech said 7200 required)- and put in a Seagate Barracuda 7200.11 ST31500341AS.
This was recognized and formated fine - however after several days when I reached around 12% free space (according to the DVR) the same issues began again.
I startd to think that the 1.5 TB size could be the issue as the 8300 never properly reported the correct size in the diags screens ( it always showed size=1 TB and free space = 1 TB regardless of usage).
So I looked for a way to shrink my 1.5 TB drive to under 1 TB and found this link
search for techwarelabs.com/seagate_1-5tb-mod/
Note that the link describes a process to shrink the drive down to 300 GB.
I used a differnt Max LBA address of 1900000000 which resulted in a size of 974 GB. This was done on using the Seagate Barracuda 7200.11 ST31500341AS.
Put all back together and it now has hit 18% full and I have experinced no issues.
Also the 8300 diag screens see the drive partition size at 970 GB and show current free space at 820 GB,
A cold boot recognized the drive as ready to use (no format request)
All seems well - and I will update with any additional info as necessary.