On Monday, 19 March 2018 23:55:04 UTC+2, Troy Weber wrote:
> I have an application running on the Beaglebone Black. It runs from the
> eMMC because we need to mount a blank SD card and occasionally store data
> or video on the external SD card. Here are some details to jog ideas:
> - using a Bealgebone black
> - connected to a powered hub and running 2 led strips and 1 camera
> - made a custom cape/shield that allows us to interface with
> - an RGB button
> - a 16x2 char lcd
> - an optically isolated relay module
> - the relay module runs a solenoid circuit (in which I'm currently
> debugging the need for a flyback diode)
> - the SD card is mounted using */etc/fstab* with the line */dev/mmcblk0p1
> /media/sd auto auto,nofail,user,dmask=022,fmask=111 0 0*
> - SD cards are inexpensive and found here:
> My application is writing files to the SD card only on certain occasions
> during which the Beaglebone will not be hard-rebooted. However, it will be
> hard-rebooted (and the application started by systemd on next boot) as a
> means of shutting it down.
> The problem is that I've recently began to discover issues with the blank
> SD card on next boot after a hard reboot. For a short time I can *touch*
> and write *vim* files on the card just fine. Once I start up the node.js
> program, part way through it complains about the SD card being read-only.
> From then on I cannot *touch* or *vim* files anymore. So I reformat the
> card and copy the configuration files back on. I've noticed that one of my
> configuration files is chopped short.
> Here are some things I've tried and intend to try:
> - have tried
> - removing the power to the hub which seemed to be back-powering
> the BBB (still fails on reboot)
> - stopping the program that writes files entirely (still fails on
> - intend to try
> - writing the configuration files elsewhere (on the eMMC for
> - better SD cards
> In the meantime, any ideas?
What's the file system on the SD card? FAT? ext4?
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