[Info-vax] Processes hang on USB-access

[Simon Clubley]

On 2022-02-17, Joukj <joukj at hrem.nano.tudelft.nl> 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?
>

Is the drive going into some deep power down state that the VMS driver
cannot recover from ?

I am very surprised no errors are being logged. On Linux, if the USB
subsystem has any problems, permanent or transient, you _always_ end
up with detailed errors recorded.

Have you checked operator.log to see if anything ended up there instead ?

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Walking destinations on a map are further away than they appear.