The nice thing about Lightroom catalogs is they keep track of the images whether the device with the images on is available is not, so it's easy to search your catalog and if the device currently isn't accessible for the photos you want, simply plug it in.
I have my photos distributed between my laptop hard drive and a desktop PC that are connected via LAN. The desktop PC has greater storage than the laptop, but I use the laptop more often, so the desktop PC isn't always on, however I don't need access to all the original images all the time, but it is important to be able to find where they are from one location.
The LRC catalog works well for this, as I've been pretty thorough with keywording, and I have my folder structure organised by date.
Syncing catalogs between devices is a bit of a pain, especially if drive letters aren't the same, but thankfully Pentax shoots DNG natively, and it's possible to save the edit metadata back to DNG files.
I have both laptop and desktop backed up to external hard drives using backup software that backs up the entire system and provides for creating bootable rescue media, so even a complete drive failure would be simple to recover from.
I use the same backup software to periodically clone drives if I find myself running out of space and need to upgrade to something with higher capacity.
A motherboard failure is actually more of a pain than a drive failure, as that requires restoring to dissimilar hardware and triggers software activation issues.
With regard to saving metadata to DNG files, someone pointed out to me that this can create large backups, as every time you update the metadata in a DNG file, the file will have changed, will get backed up again, and they can be quite large files.
A way to reduce the effect on incremental or differential backups, is to do all your keywording, titles, captions, copyright information, and basic adjustments immediately after you import into LRC, then save the metadata back to the DNG files straight away before you do a backup. After this, if you fiddle around and do further adjustments, work with virtual copies or at least don't keep saving your metadata back to the DNG files unless you have a really good reason.
---------- Post added 08-09-22 at 12:54 PM ----------
Originally posted by brianmquinn
One thing to consider is what if you suddenly cease to be around.
Someone else has confirmed that with LRC, if you stop paying your Adobe subscription, you can't do any further adjustments, but you can still access your catalog and export photos.
I actually raised just this issue with Adobe in one of their popup feedback forms, stating that archiving was important, and someone should still be able to access my catalog if I'm not around to pay the bills.
I'm fine with how they've done things, as my edits are my personal expression, so as long as someone else can get them out of LR, they don't need to be able to edit them, or if they want to, fair enough if they need to get a subscription themselves.