Reading from CDROM broken on 9.0-RELEASE/sparc64

[C. P. Ghost]

On Mon, Jan 16, 2012 at 2:54 PM, C. P. Ghost <cpghost at cordula.ws> wrote:
> Hello,
>
> I think that reading from CDROM is actually broken
> in 9.0-RELEASE/sparc64.
>
> On FreeBSD 8.2-RELEASE/sparc64, mounting a physical
> CDROM burned with FreeBSD-9.0-RELEASE-sparc64-disc1.iso
> and running sha256 on usr/freebsd-dist/*.txz yields the same
> results as listed in usr/freebsd-dist/MANIFEST.
>
> However, on FreeBSD 9.0-RELEASE/sparc64, mounting the
> same CDROM (using /dev/cd0), and running sha256 on the
> same usr/freebsd-dist/*.txz files yields completely different results:
>
> SHA256 (base.txz) =
> a96e255a9379ec1a58b756c3e788e34345fd79e35234925df842d700ccb10e1a
> SHA256 (doc.txz) =
> 54674bb68b111c3465b0beca8893a6b514b80e20dc22f2bbd208b992568261dc
> SHA256 (games.txz) =
> b9bedddeea549640b4f41a577f4c5f09aa29d0c3d0d4c105bc4fe7d327bf9fcd
> SHA256 (kernel.txz) =
> 661df36b4a2e87d2aa88ce998b50d48f2a91892fc288452a0282e3c092739046
> SHA256 (ports.txz) =
> 315cbfac6f252de5209a3513a846d14650b98e2dcf99c12779ffd1d32acaa287
> SHA256 (src.txz) =
> 6b3a4a9536b1ca2618949bb7bb44478266db551ac9f09ccfc92b5469a715f3cf
>
> This also prevents an installation of 9.0-RELEASE/sparc64
> via bsdinstall from CDROM (bsdinistall says that the data sets
> are corrupted). I was only able to get 9.0 on that SunBlade 1500
> by using a regular source upgrade from a running 8.2-RELEASE
> system (using usr/freebsd-dist/src.txz from that very same CDROM
> that checksummed correctly on 8.2-RELEASE).
>
> Just to make it clear: the CDROM media is correct and checksums
> correctly on 8.2-RELEASE. It doesn't checksum correctly on 9.0-RELEASE
> because reading from CDROM media is now (partially) broken.
>
> Just to make sure the 9.0-RELEASE sha256 program isn't at fault,
> I've mounted FreeBSD-9.0-RELEASE-sparc64-disc1.iso via mdconfig
> and run sha256 on the *.txz files again: same results as in MANIFEST.
> So sha256 on 9.0 itself is okay, it's only the reading from physical
> media that corrupts data (and prevents installation from CDROM -- funny
> that this passed release engineering and testing...).

Submitted as sparc64/164226

Thanks,
-cpghost.

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