[Info-vax] Cluster node fails to boot from shadow-set member

[Stephen Hoffman]

On 2019-04-17 14:29:18 +0000, Richard B said:

> So, in the absence of a shared SCSI bus, which I do not have, what are 
> the possible solutions?  Non-shadowed system disks?

For a cluster member to boot...  You need a direct and multi-host path 
to the system device storage and here that'd usually be either be a 
multi-host supported and Tagged Command Queuing (TCQ) -capable SCSI 
controller and supported shared SCSI storage such as an MSA30-MI HDD or 
SSD shelf or would be a Fibre Channel Host Bus Adapter (HBA) and Fibre 
Channel storage, or you could configure this Integrity box as a 
satellite and a served satellite path and network boot and the OpenVMS 
host serving the disks can shadow or RAID, or you can configure 
multiple parallel system disks.  Here, you're likely going to have 
parallel system disks and with these then mounting a storage device and 
that usually in SYLOGICALS.COM storage for a common set of shared 
files—see SYLOGICALS.TEMPLATE for a partial list of some of the roughly 
two-dozen files necessarily shared for a stable and consistent cluster. 
 The shared storage for SYSUAF, RIGHTSLIST and the rest of the 
necessarily-shared files can be configured with host-based or 
controller-based RAID.  The local system boot device storage will 
probably be controller-based RAID.




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