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I have installed Raspbian and have attached 2TB External Hard Disk via USB with ext4 partition. I am trying to use it as a NAS device. Also I am accessing Pi over SSH from LAN and also from Internet. When I am accessing over Internet it gets disconnected randomly, lights on the board keep on blinking. It is not shown in connected devices list on my router Netgear (wnr2000v3). I am not able to figure out what is going wrong.

First I had connected via Ethernet and I have also tried using WiFi card but the case is same.

vedarthk
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3 Answers3

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I had the same issue, using a 700 mA power supply. Power reqirements depend on what peripherals are connected. This power supply page concludes that using a 1200mA power supply from a reputable retailer will provide ample power to run the Raspberry Pi.

Glorfindel
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willer
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To sum up the answers given in the comments section (and get rid of another unanswered question):

Network disconnects were traced back to power supply issues. So beware of power brown-outs.

  • 5v 700mA adapter -> solution: 5v 1200mA adapter
  • 5v 1000mA adapter -> solution: 5v 2100mA adapter

Edit to add:

Here are some measurements regarding the power consumption of the various models of the Pi:

Ghanima
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I had this issue with a Raspberry Pi 4 w/ 7" touch display, powered via PoE HAT. My SSH sessions would disconnect, leaving the SSH (sshd) process still running on the RPi, leaving me to believe it was a hardware or power issue.

Disabling the Wi-Fi and Bluetooth radios using the hardware overlay system in Raspbian, edit /boot/config.txt:

dtoverlay=disable-wifi
dtoverlay=disable-bt

Seems to allow the RPi to operate without issues. The touch screen and RPi work fine so far.

Rancorm
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