[Info-vax] Processes hang on USB-access

[Joukj]

Volker Halle wrote:
> Jouk,
> 
> most likely a hardware and/or OpenVMS driver (DNDRIVER isn't it ?)  issue.
> 
> Did you try a DISMOUNT/ABORT - this must be the first command to dismount the disk. If another DISMOUNT is already hanging, it won't help.
> 
> If you have a process hanging reading/writing to that disk, enter SDA, set context to that process and issue a SDA> SHOW PROC/CHAN - the DNcn: channel should be busy
> 
> Then also try SDA> SHOW DEV DNcn: to determine the state of the IO.
> 
> Instead of 'resetting' the system, try a forced crash at least once (CTRL-P >>> CRASH on the console). This would at least document the state of the system at that time. Then look at the dump with SDA, while the system is up and running again.
> 
> And as this is a VSI OpenVMS Alpha version, also try the VSI OpenVMS Forum.
> 
> Volker.

I will try the SDA next time it hangs. Then I'll try the DISMOUNT/ABORT.
I will try the "crash", but I'm not sure if on this system the .DMP is 
large enough, so maybe I have to create it first.