Re: NFS Backed image catalogs Was: [7.3] IFS save 21 vs. sav with chgperiod (no BRMS!)

Hello Rob,

Am 17.02.2025 um 02:45 schrieb Rob Berendt <robertowenberendt@xxxxxxxxx>:

That special connection is a bit familiar.

I assume you're referring to the service tools adapter?

I've done similar things when playing with image catalogs over virtual optical across the backplane from one lpar to another. I stopped using that when I had conflicting lpars trying to use the same image catalog and getting the current mounted volume conflicting.

I see. I wonder how that could have happened altogether, but then, a lot of details are unclear. :-)

https://www.ibm.com/docs/en/i/7.5?topic=storage-virtual-optical-using-network-file-system
Part of me is concerned about the remark that it uses TFTP. TFTP is not supported past 7.5. But I'll be happy to get that client upgraded from 7.2 to 7.4, then maybe to 7.5 after that ages.

As far as I understand the IPL mechanism works, TFTP is only needed if you want to IPL the resulting backup image remotely. Hence I want to make it available to VIOS, so no tftp necessary.

I will do the time trial and I'll take your caution about not expecting great time with that.

I'm curious about your actual findings.

ne part in your instructions which concern me is the remark: Note: You cannot create or modify remote (NFS based) image catalogs with the IBM i provided commands. Those only work on local QSYS.LIB based objects. I fail to see how anything with IBM i image catalog commands has anything to do with the /qsys.lib file system. For example, what does
ADDIMGCLGE IMGCLG(CUME750) FROMFILE('/fixes/cume750/volume1.bin') TOFILE(*FROMFILE) have to do with /qsys.lib ?

The object you create with crtimgclg, and modify with addimgclge resides in QSYS.LIB. See the imgclg() parameter in your example.

NFS based remote image catalogs are different. They're entirely defined by the VOLUME_LIST command, and get their final properties (being a tape or optical catalog) solely through the association with a device file.

Does that help in understanding?

:wq! PoC