On Aug 8, 2019, at 16:52, Zane Healy wrote: > > On Aug 8, 2019, at 4:29 PM, Frank McConnell via cctalk > <cctalk@classiccmp.org> wrote: >> One of the things I have found with the Pi is, the low end micro SD cards >> (P*tr**t and K*ngst*n would match the ones that did this) are lossy storage. >> It’s not that they wear out, it’s that they lose bits. Switching power >> supply to one sufficient for the Pi did not solve this problem, they >> continued to lose bits. >> >> -Frank McConnell > > With my RPi2B, my wife tripped a breaker, and scrambled the card. That was a > Lexar SD card. Of course that was also one of the critical systems in my VMS > Cluster. I’ve moved to VM’s, on my VMware cluster, for all my OpenVMS > systems. My one Rpi3B runs Multics, the other TOPS-20. I’m thinking about > rebuilding the RPi2B as a PDP-11.
No interruptions of power to running systems, just cards left idle after shutdown -P for some days/weeks/months while I worked on others. At first I was running from a weak (5V 1A) power supply and thought that cute lightning-bolt icon on-screen was its way of indicating that it was writing to its flash storage. I switched to a recommended power supply that met the stated requirements and still had data loss in further experiments with (freshly re-installed and left idle) cards that had lost bits previously. -Frank McConnell
