Accessing CDs broken (was: Install ISO: Issues with cd9660 (at least) on Alpha and VAX?)

Hi!

On Sun, 2026-01-18 21:43:39 +0100, Jan-Benedict Glaw <[email protected]> wrote:
>   First I thought that maybe the PiSCSI broke, but by now, I think
> NetBSD somehow is broken. These are the observations / symptoms:
> 
>   * Building the release (of which I use the ISO) works well on amd64
>     Linux as well as NetBSD.
> 
>   * Linux will happily loop-mount the ISO image and access it as
>     expected.
> 
>   * Both the Alpha 3000/600 as well as multiple tested VAXen
>     (3100/106, 3100/95, 4000/60) will boot off the simulated RRD42.
> 
>   * The systems can mount the ISO from the simulated RRD42. `cd`ing
>     into the mount point result in this message: "RRIP without PX field?"
> 
>   * Accessing files results in "Invalid argument". This is from a
>     shell ran after aborting the installation as no set could be
>     extracted:
[...]
> 
> As I suspected some issues with PiSCSI, I burned the CD to a CD-R and
> fetched some real SCSI CD-ROM drives. Turns out, old drives have a
> hard time recognizing the CD-R, but finally Plextor PX-W1210TS works
> well. Firmware easily boots off the burned CD, installer starts, but
> shows the exact same issue extracting the sets. It is the same for
> Alpha as well as for VAX, so I think something is really broken here.
> 
>   I've uploaded a sample image here:
> https://lug-owl.de/~jbglaw/upload/20260118213312_NetBSD-11.99.4-alpha.iso
> 
> Could anybody please simply try to mount it and access all the files
> on it on a NetBSD-current system? At least for Alpha and VAX, this
> ain't work. I'd *love* to discuss some hints. All I'd to is try to
> bisect to quite older versions, but maybe somebody has an idea on this
> issue. At least there don't seem to be relevant changes in the SCSI CD
> driver "recently". The cd9660 driver had some changes, maybe I'd
> revert them and give it a try?

I gave one of the CDs I tried to my wife to test them on a Windows
systen, she's easily access all then content. So I am fairly confident
that either the cd9660 fs driver or block access to CD drives ia
broken.

As I get some time, I'll try with a mass-produced CD and in addition
copy the whole block device.

MfG, JBG
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