Hello

I am having an issue where when I plug my Lacie 2TB SSD into my MacBook M1 Pro via thunderbolt 4, the Mac does not see the SSD and when I start up disk manager to see if it can see the SSD, I can't even get into disk manager. It opens, but everything is blank.

Has anyone else has this?

I am not sure if it is the hard drive failing or the MacBook that has gone crazy

Thanks

 

Format disk Fat32 If using Mac and Pc APFS for mac only then it will see drive.

 

I have never had a problem with it until now, the disk is formatted as Mac OS extended journaled. I did wonder if it was failing, but ran first aid on it, and Mac said it appears to be ok.

 

New to Mac, someone here should know.

 

It sounds to me like possibly the partition map may have been corrupted.

This can happen when drives are not properly ejected or powered down and some other situations etc...

If it's an SSD, I would recommend always formatting it APFS regardless on M chipped Macs, although first lets see if we can save your date:

What I would do in this situation, hmm... I had something similar happen of late, and it was caused by a piece of software that failed to unmount the external drive (also was formatted HFS+/OS Extended Journaled etc) .. (mine was a HDD though)...

If you have access to a Windows or Linux machine, I would try and mount it on there (and no, you may not 'see' it there due to forma) but it will do some FSCK work and might fix the partition map easier then some other options I will lay out after.

Since you are new to Mac, I assume you don't have an Intel Mac around right? Because I would recommend Disk Warrior on that if so, but they don't have a version for silicon Mac or APFS drives (though it might work in Rosetta)...

I was able to resurrect the drive myself, and I think yours is probably fine too, ...

If you have the data backed up (you should obviously but I get people don't...and sometimes it's a hard lesson to learn...)

I would skip all that and go right to reformatting it, APFS (NOT HFS+ as it's an SSD), Guid, and perhaps do so TWICE or THRICE to make sure, and I would bet dollars to donuts it pops right back up... (albeit without your data)...

 

Any luck @Vincent Price ?

 

all out of sudden? is it new? are you really using Thunderbolt4/Thunderbolt3 cable, and not USB-C ?
what data is supposed to be on the drive? what format and partition map?

 

DiskWarrior will repair an HSF+ drive with ease. No worries