Re: Accessing CDs or cd9660 broken

On Mon, 2026-01-19 08:22:57 +0100, Jan-Benedict Glaw <[email protected]> wrote:
> On Sun, 2026-01-18 21:43:39 +0100, Jan-Benedict Glaw <[email protected]> wrote:
> >   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.

Tested some more:

  * A Win98SE image would produce "Invalid argument"s when accessing
    files.
  * I copied the contents of the NetBSD Alpha install ISO and
    re-created an ISO image with the original content (though it
    probably won't boot any longer, but it should be enough to hold
    all the sets) on a Linux host using
    `mkisofs -o /tmp/NetBSD-10.99.14-alpha-rebuild.iso -R -v -v .`
    (This image is available at
    https://lug-owl.de/~jbglaw/upload/20260119210927_NetBSD-10.99.14-alpha-rebuild.iso)
    Accessing this new CD created with a different creator also
    produces "Invalid argument" errors.

--> The problem seems to be clearly with NetBSD's cd9660 driver or
some underlaying mechanism (block-level access to the SCSI CD
interface, ...)  Would be nice if somebody could test with a recent
NetBSD current version whether or not CD / cd9660 (with RR
extensions?) still work for them? Maybe with my above two images?

MfG, JBG

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