[Info-vax] Attempt to shadow IDE disk hangs DS10L

[Michael Moroney]

Tom Wade <nospam at tomwade.eu> writes:

>> you could boot with >>> B -fl <root>,30000 - this will show a lot of
>> debug output. 

>That certainly generated a lot of output.

>I've put the full text in the anonymous FTP area on vms.tomwade.eu as 
>HANG-BOOT-LOG.TXT

> >Has the DSA0 device been mounted ? Is the physical boot
> >disk a member in DSA0 ?

>Well the ANALYZE/CRASH showed the DSA0 device existing with $5$DQA1 as 
>the master member, so I think so.

>It ended with

>> %EXECINIT-I-TMVPTES, setting TMV up with its PTEs
>> %EXECINIT-I-SVAPTE, setting up EXE$GL_SVAPTE
>> %EXECINIT-I-BLD_LOCKID, building the lock id table
>> %EXECINIT-I-BLD_RESHASH, building the resource hash table
>> %EXECINIT-I-RESMEMALC, performing reserved memory allocation
>> %EXECINIT-I-CLRWARM, clearing warm-start flag
>> %EXECINIT-I-CLRCOLD, clearing cold-start flag
>> %EXECINIT-I-ACTIVESET, joining ACTIVE set
>> %EXECINIT-S-CIAO, transferring to the scheduler
>> %SWAPPER-I-SHUFFLE, executing SWAPPER initialization code
>> %SWAPPER-I-SYSDISK, checking status of system disk

>after which it hung.

If I recall, SWAPPER is waiting for the "valid" bit to be set on the
system disk UCB at this point, and for whatever reason, SHADOWING is not
setting it.  Look at the system disk UCB and see if it's set or not.

Also, I don't believe IDE disks are supported with SHADOWING, however I
don't remember why not.