Mounting device copied from another Cache system

Question

Question

Kevin McGinn · Jun 5, 2023

I need to mount a database from another system. We have copied a device from another systems and mounted the device. I want to mount the cache database on this new device to our current instance of cache. If I add the name and path of this new device to the cpf file, the instance fails to start stating the database does not exist. If I attempt to create the database via the management portal, the new device is not accessible. I am missing something but I am not sure what it is. What do I need to do to make the imported device accessible by my cache instance?

Product version: Caché 2017.1

Discussion (3)1

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Kevin McGinn · Jun 5, 2023

I resolved this issue. Permissions were incorrect on the new device. Missed this when reviewing the issue. Fixed the device permissions, shutdown the instance, updated the cache.cpf file, and re-started the instance

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score 0 · Answer 1 · 2023-06-05T11:52:35-04:00

There are several major steps:
Mount the LUN or LUNs as a filesystem
Have the required namespace
Mount the CACHE.DAT in Cache. Look at ^DATABASE
Have the required global mappings.

My suggestion is to install another instance of Cache on the server.
That way you might be able to update the cache.cpf using the one from the old server as a template.

This is a pretty complex task.

score 0 · Answer 2 · 2023-06-05T11:56:39-04:00

Make sure that the endians (big or little) of the two systems are the same. If they are not, you can use the cvendian program on the CACHE.DAT to convert it to the proper format.