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New ThunderBay with Big Sur

Active Member


I just got an ThunderBay 4 and have Big Sur.

I am looking to get rid of my Drobo and move my stuff to the ThunderBay. I see there is an Beta and wanted to confirm if APFS volume is working or should I stick with HFS+? Also Is RAID 6 working or do you thing RAID 5 is fine for the 4-Bay? It seems like about 50/50 when I try to read about it it.

If I do RAID 5 can I convert to RAID 6 or will I have to wipe and restart from scratch? 

I have a Mac that I can I can Dual boot in to Catalina should I run the non-beta and do everything from that? Then use the beta once everything is moved over just to monitor / mount on my main Mac.

Trying to figure out best options so I can get rid of the Drobo.

Topic starter Posted : 03/02/2021 8:16 pm
Member Admin

Dont blame you for wanting to migrate.

RAID 6 code is not functional yet, it is sample code. We are intending to convert RAID 5 to 6, but only by adding one more drive.

APFS vs. HFS is a ongoing question. HFS is more problem prone (Its 30 years old after all), but APFS is much slower for HDD's and there are no repair utilities (like Disk Warrior, etc.) available yet. Since files are fragmented, it is more difficult to recover when there is a problem. But, APFS should be much more stable.

I would use the 6.0 beta on both Big Sur and Catalina. There is no problem either way.

Posted : 03/02/2021 9:37 pm
Active Member

So I think I am going to go with HFS. Maybe when an repair utility is compatible then will switch.

For RAID 5 to 6. Since I am using an Thunderbay 4 and have all slots being used will I not be able to convert? I Will have enough free space to use RAID 6. Should I set it up with only 3 drives for now? Can I make that change (Remove a drive for the current RAID) with data on it or will I have to wipe and start over?

Topic starter Posted : 04/02/2021 6:08 am
Member Admin

I do not have a 100% clear answer for this. We intend to have the ability to add a disk to a RAID 5 to make it RAID 6.

However, I see no point, in truth, to a 4 drive RAID 6 volume. The value is not there.

In the nearly 100,000 RAID 5 configurations using SoftRAID, I can only remember maybe 4-5 over the past 5 years, who had two disks fail at once, as the predictive failure informs you about disk failures before they actually fail in most cases.

Posted : 04/02/2021 11:25 am