Re: PS 4100 Showing Volume size after Firmware Upgrade
Gathering the diags can be done via the GUI under the Tools menu or CLI. Support can help you with that process.as well.
Here's a video on how to do it as well.
Depending on the activity during the last year some of the log info may have been overwritten. The diags will show how the current drives are working which could be more beneficial to you.
re: Cost. That I do not know.