On the flip side of ³Randy¹s Coin², I HAVE a crash at least once a day and sometimes more, crash being defined as total system lock up requiring forced shutdown (but not getting the infamous multi-language dialog box). I restart into terminal and fsck yf which always comes up with orphaned indirect node and seven numbers, under multilinked files. there may be 1,2, or 3 indirect nodes listed. Have done everything I can think of to correct this problem including disk repair from SW CD, disk warrior, tech tool pro, hardware test, permission repair, Apple tech support was no help either by telephone. I think I know Randy¹s ³fix it ³ pages by heart. Running a new (in January) MDD Dual boot 1.25 GHz G4 with 1.25MB RAM, OS 10.3.4, factory installed 60GB HD plus another internal hard drive set as slave, a 60GB F/W external drive and a 120GB F/W external drive both connected but not on. These lock-ups are totally spontaneous and may occur regardless of what I am doing. The only clue I have is that when the 2 F/W drives are connected to the 2 F/W ports, the Mac does not see the 120, but it shows up fine on my lap top and I can even boot up the laptop with it. The 60GB shows up fine, I have switched ports, cables, etc to no avail. On the other hand when I daisy chain the two drives with the 60 in the middle and the 120 at the end they both show-up fine. This is the second 120 drive having returned the first one for this same reason. This is a Neptune drive from OWC. Their tech support cannot figure out what is going on either, except that they had a customer with the same set-up as I have, seeing the same problem. Apple after considerable testing determined that he had a bad logic board, replaced the board and everything work as advertised. After all of the above information, is it conceivable that my logic board is also causing the lock-ups and occasional bad address crashes. I have found OS 10 on this machine to be the most unstable OS I have ever used and I go back to 6.5 or so. Thanks for listening Al Jones