[Info-vax] USB disk enclosures

[Dale Dellutri]

On Tue, 25 Oct 2016 15:38:25, Hans Vlems <hvlems at freenet.de> wrote:
> My DS10 at home runs axp/vms v8.4.
> It has a chinese USB interface that is recognized by VMS. Memory sticks of various sizes work well and are recognized with their specific DNA device number. 
> Enter two 2.5" SATA disks, 80 GB and 120 GB respectively. I bought two identical disk enclusures put the disks in and did an init/system on the 80G drive on the DS10. Mounting worked well and I copied 40GB of disk images to it.
> Dismounted the DNA device. Disconnected the disk and replaced it with the 120G disk enclosure. 
> It got the same DNA device number. Init/system resulted in an error message that the number of blocks was different from the previous time the device was mounted. A backup to it failed and the DNA device was in mount verification state.
> 
> Apparently the same enclosure hardware for two different disks, both make and capacity confuses the USB drivers.
> 
> I connected both enclosures and sho device returned one DnA2: device while UCM two disks were shown, both called DNA2.
> 
> Is there a workaround for this, so that I can use them both on the same system, at least alternately?
> Hans

Does sysman io autoconfigure /select=dna2: rebuild the device
driver with the new info from the disk?

$ mcr sysman
io autoconfigure /select=dna2:

-- 
Dale Dellutri <daQQQle at panQQQix.com> (lose the Q's)