10.8.3 update: issue with HDD in optical bay of MacBook Pro
After updating from 10.8.2 to 10.8.3 the second internal HDD which is placed in the optical bay of my MacBook Pro late 09 gets lost after some minutes. That means it suddenly unmounts (with a warning message about improper unmounting) and can't get activated again. Diskutil will not see it any longer. After a restart its mounted - until it spontaneously vanishes again.
Before everything has been working flawlessly for about 2 years, with SSD in the original HDD Bay an the HDD in a optical bay caddy. Firmware is EFI 1.6 (downgraded, because 1.7 won't work properly with such a constellation).
Has anybody else made similar observations or maybe already found workarounds for this issue? I was forced to go back to 10.8.2 because I need this second drive!