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

[Jan-Erik Soderholm]

On 2010-08-09 21:08, Michael Moroney wrote:
> 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.

The shadowing manual says :

"Disks and controllers must be one of the following types:
— StorageWorks Fibre Channel
— StorageWorks SCSI
— MSCP (mass storage control protocol) conformant"

And there are other requirements that probably makes
IDE unsupported/unfunctional.