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My new Mac Studio is attached to a LaCie 16TB drive configured not as a mirrored 8TB RAID but as a single 16 TB drive. Connected to my Mac Studio with a Thunderbolt 4 cable. Will not mount and failed First Aid. Here is a screen shot. Not sure how to fix this.
Mac Studio (2023)
RAID 0 specifies it a member of a Striped RAID set, where every-other SuperBlock of data are written to every-other drive in the RAID set.
A drive initialized as a member of a RAID can NOT be used as regular drive unless/until it is ERASED again, as a regular, NON-RAID drive.
You have no data on it. Just ERASE again as a regular drive. it can not be used for data by itself unless/until you ERASE it a s a regular drive.
You don't have to trust me, or even believe me. Right now it is unusable.
ERASE it and you will see. Just give it a try. It takes just a minute or two.
Any drive that has been previously used as a RAID drive has custom RAID device data structures written to it to deliberately set to be completely unusable for ordinary disk accesses on a Mac. That is why it appears to be absolutely FULL in disk Utility.
This is to avoid accidentally seeing the drive as a regular drive and "fixing" it (which might make it lose its RAID-ness and its data)
Thanks for your reply. Using Show All Devices the drive appears and I was able to run First Aid which shows the partition map is okay. The mount icon in Disk Utility is greyed out and cannot mount. It is also showing the drive is completely full, no specific count, just a full 16TB. What to do now? Is this a drive issue or something with Sonoma?
Now I get this error message:
Did you ERASE it with Disk Utility? that is best practice with a new or repurposed drive.
Be sure to set the View menu to "show all devices" and erase the physical device by its immutable manufacturer-given device-name.
if you never ERASEd that drive, it is still a Windows-formtted drive.
Select the drive by its immutable manufacturer-given device-name and choose ERASE.
It takes only a few minutes and will install a new PERFECT Directory on your new drive.
default partition is GUID and default Volume is Apple File system, APFS, and give it a name that is unique and meaningful to YOU.
Any drive that has been previously used as a RAID drive is deliberately set to be completely unusable for ordinary disk accesses on a Mac. This is to avoid accidentally seeing the drive as a regular drive and "fixing" it (which might make it lose its RAID-ness and its data)
To use that same drive as a Regular (not RAID) drive, You MUST ERASE the drive.
Hi Grant, thanks for your insights. I did erase the drive in Disk Utility and set it to RAID 0 so it would behave as a 16TB drive instead of a 8TB RAID. It is a LaCie 2big Dock Thunderbolt. I'm wondering if the post production house that transferred the files exceeded 16TB as the drive is showing completely filled.
Hi Grant,
I believe you, of course, it just hadn't occurred to me that could be the issue. What perplexes me is if the LaCie 2big Dock thunderbolt drive is configured as a RAID 0 ad connected to my Mac Studio via Thunderbolt then why isn't it operating as a freestanding RAID as it would when in a RAID 1?
This drive has only been used on my Mac. I erased it and changed it to a RAID Zero.
Or is this possibly a Sonoma bug? I have noticed some posts regarding this in Sonoma as well as Monterey.
16TB drive will not mount on my new Mac Studio. Get error that says Invalid B-tree node size.
