https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=294338
--- Comment #6 from Vladlen Popolitov <[email protected]> --- (In reply to Warner Losh from comment #5) I searched and found that some BIOS implementations (Legacy BIOS, not UEFI), such as Dell's "Hard-Disk Failover", can be configured to try multiple boot devices. However, other systems may simply stop or hang when a disk is unresponsive. I am thinking about a scenario where the user explicitly goes into the BIOS setup, enables Hard-Disk Failover (or a similar feature) and adds multiple disks to the boot order (e.g., first `da11`, then `da3`). Then, when upgrading to a new release, they forget to install the updated boot loader on all of those disks. I am not sure that this exact scenario needs to be described in the documentation. However, a general recommendation could be added: "Update the boot loader on every disk that appears in your BIOS boot order, not just on your primary disk." This more accurately describes the action required during the upgrade, without referencing ZFS mirror (which is not the determining factor here). If I have missed something or if my understanding is incorrect, please let me know. I may be wrong, and I appreciate any correction or additional insight. Hardware choice is huge. -- You are receiving this mail because: You are the assignee for the bug.
