re-format SSD flash Macbook Air

I

iMore Question

After using my 256GB SSD (OWC) on a MBA it stopped functioning. When I start up the MBA it sometimes shows the desktop. However, after 30 seconds the spinning wheel appears depending on how fast I move the mouse (?).

Using diskmanager gives and trying to erase the disk gives the following message: "This disk is not using GUID partition"
Using DiskWarrior it says: "Directory can not be rebuild, the partition map may be corrupt."

What to do?
 

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