May not be right category, but hope it can be moved.
Tablo w/ 4 Tuners. OEM power supply, Coax connected, Seagate 1TB Backup drive hanging off USB port.
Problem I noticed was the drive always ran slightly warm, but the Tablo itself ran downright hot. Note that it is unusual for us to have an unused tuner, most are always recording. Women and their cooking / This Is Us tv shows…
On a whim, I added a USB3 rated hub, powered by its OEM 5Amp wall-wart, and plugged drive into the hub. Next day after much insincere apologizing for interrupted recordings, I checked and found my Tablo running much cooler, drive about the same, hub running warm, hub power supply warmer than I expected but less than 100F. The drive is rated at 5v 1.5A (7.5watts) on the heavily damaged label. Info may be wrong. Occasionally seeing some pixelation but so far only on shows recorded thunderstorm (ant is in attic) so may just be coincidental. Still, the hub may be slowing down bus.
What are the ports on back of the Tablo rated at? Are they both USB2/3
Same supply ratings?
Anticipated port behavior if detects an external 5v present? Scenario would be from using a USB Y cable. 1 for data/power, other for for power only, 3rd is female to drive.
Taking external power further… Should the 5v for drive supply (Y Cable) be from isolated supply so tablo only sees it on 5v and Gnd pins? Or should 5v Gnd reference be tied to Tablo power input as well?
Again, drive is now connected via a powered hub.
I am working on my DC UPS now, and trying to get info whether its best to run Tablo & Accessories from a common supply, or do they need to be seperate with common ground, or isolated fully from each other (dc/dc converters with isolation)?
To answer question coming next… The antenna coax is currently NOT grounded on shield due to lack of bond point availability (not NEC compliant install) and am currently NOT using a booster/Sig amplifier though that may change when adding 2nd Tablo. I do realize that adding booster will likely end up grounding shield.