Difference between revisions of "CDU-710/M disk controller"

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m (External links: Add github lkink)
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* [https://github.com/abs0/4.3BSD-Quasijarus 4.3BSD-Quasijarus with fixes on github]
 
* [https://github.com/abs0/4.3BSD-Quasijarus 4.3BSD-Quasijarus with fixes on github]
 
* [http://www.classiccmp.org/pipermail/cctalk/2017-January/030798.html 4.3BSD boot bug]
 
* [http://www.classiccmp.org/pipermail/cctalk/2017-January/030798.html 4.3BSD boot bug]
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[[Category: UNIBUS Storage Controllers]]

Revision as of 00:08, 17 December 2018

The CDU-710/M is a UNIBUS SCSI disk controller made by CMD Technology Inc.. It fits in a quad Small Peripheral Controller slot. It support's DEC's Mass Storage Control Protocol.

4.3BSD Quasijarus bootstrap bug

When booting 4.3 BSD Quasijarus, there is a bug (although VMS, NetBSD revisions above 1.6 or so, and Ultrix-32 all boot fine); it hangs inside udcmd() in sys/vaxstand/uda.c.

The fix is to change line 155 from:

    if(u->uda_ca.ca_rspint == 0)

to:

    if(u->uda_ca.ca_rspdc & MSCP_OWN)

Re-build the bootstrap, and then run disklabel to update the copy on the disk.

External links