As shown in the screenshot, there are strange icons on two seagate HDD. What does it mean? This is on Ubuntu 19.10 with zfs enabled.
21 Answer
I raised an issue about it with the gnome-disk-utility developers, and it seems to be a theming issue in Ubuntu.
The presence of an icon probably indicates the disk is in standby, and it should likely be a sort of "ZZZ" icon, as seen in :
Based on their advice I filed a GitHub Issue for the Yaru theme, and this has been fixed in their main branch, although this doesn't seem to have propagated to 20.04 yet...
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