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I have recently turned by Raspiberry Pi 4B into a small NAS. However, I noticed that the Pi disconnects from Ethernet from time to time. Whenever this happens (e.g. ssh not responding or Pi not reachable in network) the green and yellow lights of the Pi's Ethernet port turn off, while the red front led is still on, which made me think that the 4A charger might not supply the whole system with enough power. My setup looks as follows:

All information I have found regarding this problem (like this post for example) was rather old and even suggested that a 4A power supply should be enough. Sadly, I did not really find any information about how much current the hard drive draws (amazon states that it requires 8W, but I don't really know how reliable that information is). I also do not have the required equipment to measure any of the components' current drain or the quality of the power supply.

Therefore, I wanted to reach out to the community to ask whether you think that the power supply could be the problem here. Also, if this is the case, do you have a suggestion for a suitable Type-C power supply?

Thank you very much in advance!

Roysten R.
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Your power supply is not big enough. Look at this link: https://www.seagate.com/www-content/datasheets/pdfs/barracuda-2-5-DS1907-2-1907US-en_US.pdf It shows the R/W current 1.7/1.8 amps. The recommended Pi power supply is 3A minimum. That puts you at 4.8 Amps recommended minimum. I would suggest a power supply of at least 6 Amps preferably more.

Gil
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No matter how big the power supply the absolute maximum you can draw from USB is 1.2A i.e. 6W

You NEED a powered drive.

Milliways
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