krnl386

krnl386, 8 months ago

Assuming you were using a Linux software RAID, you should be able to recover it.

The first step would be to determine what kind of RAID you were using… btrfs, zfs, mdraid/dmraid/lvm… do you know what kind you set up?

To start the process, try reconnecting your RAID disks to a working Linux machine, then try checking:

1. The sudo lsblk command will help you get a list of all connected disks, sizes and partitions.
2. The partition tables on the disks, eg: sudo fdisk -l /dev/sda (that’s a lowercase L and /dev/sda is your disk)
3. Assuming you use a standard Linux software RAID, try sudo mdadm --examine /dev/sda1. If all goes well, the last command should give you an idea of what state the disk is in, what RAID level you had, etc.
4. Next, I would try and see if mdadm can figure out how to reassemble the array, so try sudo mdadm --examine --scan. That should hopefully produce output with the name of the RAID array block device (eg, /dev/md0), RAID level and members of the RAID array (number of disks). Let me know what you discover…

Note: if you used zfs of btrfs, do not do steps 3 and 4; they are MD RAID specific.

krnl386, 8 months ago

Good point! I assumed the worst; but it’s possible the array is rebuilding or even already rebuilt and just needs to be mounted.

krnl386, 8 months ago

According to LocalSend docs these are the ports that need to be opened: **Multicast (UDP)**Port: 53317 Address: 224.0.0.167 **HTTP (TCP)**Port: 53317 AFAIK macOS firewall is app-based, at least in the GUI. So depending on how you installed LocalSend, you may have to add it to the list of allowed apps: support.apple.com/en-ca/guide/mac-help/…/mac

You may be able to add the ports above to /etc/pf.conf manually, but AFAIK messing with pf on macOS is not recommended.

The other thing I wanted to ask is about Vallum. If you have it running on that Mac, would it not “take over” the macOS firewall?

krnl386, 8 months ago

I had a similar issue as you, and switching/reseating DP cables solved it for me. This is the switch I am using.

Also note my monitors can only do 4K@60Hz.