[Info-vax] Processes hang on USB-access

[Joukj]

Volker Halle wrote:
> Jouk,
> 
> OpenVMS I64 V8.2:
> 
> SDA> IO LOAD
> SDA> IO START TRACE/DIO/NOBUFIO
> SDA> SPAWN DIR DNA0:<*...>/OUT=NLA0:
> SDA> IO SHOW TRACE
> ...
>  3-MAR 15:56:50.147379  00  84F21E80  0943DFDD  84C200C0  DNA0          DirIO    readpblk    FFFFFFFF.7D4C68E0  00000200  02000001
>  3-MAR 15:56:50.125368  00  84F10840  0943DFDB  84C200C0  DNA0          DirIO    readpblk    FFFFFFFF.7D4C68A8  00000200  02000001
> 
> So here it works.
> 

OK after a couple of ours I see some entries in the trace.
Now hope that when it hangs it does not overwrite the buffer again.