Re: Filesystem errors on armv7 -current

On Fri, Oct 23, 2026 at 06:27:43PM -0700, bob prohaska wrote:
> 
> The least-intrusive change I can make at this point is replace the
> wallwart on the powered hub running the hard disk. That will change
> only one connection, the barrel jack on the hub. Wiggling it once
> raised the measured voltage on the hub by about 100 mV, so that
> disturbance is already taken into account.

Turns out the hub barrel jack is ever-so-slightly smaller than that 
on the  spare wallwart.... Meanwhile, no hint of faults emerged
while watching the original power supply in action with a 'scope.
 
> The machine is still running buildworld at the building libraries
> stage. I'll wait for it to finish or crash before changing things.

Buildworld stopped again, same sort of filesystem errors. It looks
like time to test the disk, but it isn't smartmontools compatible.

Can anybody suggest a disk testing utility that's non-destructive
and usable on either FreeBSD or RasPiOS? I've already compiled
disroaster, but it's obligately destructive, so not ideal. 

I'm trying a linux program called diskscan, but it just passively
reads the disk. A read/write/read/restore strategy would be more
informative, even if more risky. 

Thanks for reading and any suggestions,

bob prohaska