On Oct 22, 2026, at 9:35 am, bob prohaska <[email protected]> wrote:
> On Wed, Oct 21, 2026 at 10:32:07PM -0700, Bakul Shah wrote: >> >> One can buy a cheap inline USB power meter or tester to see >> what sort of voltage/current is in use. Fancier ones such as >> FNIRSI FNB48P that will let you see a realtime graph of >> voltage/current at various sampling rates + you can upload >> this data (+ there is vibe coded s/w to run on linux/mac for >> this as well). Very useful for debugging this sort of >> problems. > > I have chopped a USB cable to bring out the power leads and > connected them to a voltmeter in the past. That would seem > adequate to identify a faulty power supply. I haven't tried > it in this specific case, but given the absence of messages > from umass other than those at boot, is there any point? Just a thought, but if your system is generating disk errors (as evidenced through errors from find, etc.) then it's also possible that writing to logs in /var/log may also fail, assuming it is on the same potentially-questionable disk. Are you shipping logs to a remote syslog server in your setup? Cheers, Paul.
