[Info-vax] Processes hang on USB-access

[Dave Froble]

On 2/17/2022 4:15 AM, Joukj wrote:
> Hi all,
>
> I have an 2 TB USB-disk attached to a DPWS500 running OpenVMS Alpha V8.4-2L1.
> After a couple of hours to couple of days the process reading/writing to the
> disk seems to hang on the disk access. When some other process tries to access
> this disk in this state, it also hangs. A normal reboot of the machine is not
> possible anymore since also the dismount of the disk hangs. I have to reset the
> machine.
>
> No errors are logged for the device.
>
> What could be the problem and how can I avoid processes hanging on access to
> this disk?
>
> I already changed the USB-disk for a brand new one and I changed the machine to
> which it is connected. I think I also tried a XP1000.
>
>
>         regards
>            Jouk

I seem to recall that the USB implementation on older systems from DEC was less 
than great.  You may discover the problem with a system dump and SDA, but, then 
what?

-- 
David Froble                       Tel: 724-529-0450
Dave Froble Enterprises, Inc.      E-Mail: davef at tsoft-inc.com
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