Second SATA drive stopped working (after lion upgrade) Since I upgraded to Lion, my second SATA drive stopped working. The issue occurs only for reading files, not writing. I can unmount it, but I can't rename nor delete files.

I have two SSDs installed in my MacBook Pro and when I look at 'System Information' it lists both drives. So they are properly recognized. 

However, the first drive is listed as:

"Solid State SATA"


and the second (working) one is listed as

"Flash Storage"


Both drives are formatted as OS X Journaled, so they are of the same format.  

Does someone has any idea what's going on over here? And how can I solve this?
Have you updated your EFI?  Lots of potential problems depending on the drive and the model of MacBook.

In particular it appears that SATA 3.0 drives (6.0 Gbps) are not well supported. The EFI update resolves some problems, but not others. Is the read only drive in the optical bay? That would be consistent with the kind of problems reported.