According to apple's FireWire FAQ found here
"Question 7: Can FireWire devices be connected in a daisy chain?
Answer: Yes, and if the devices are designed according to the FireWire standard, they can be turned on and off as needed. For example, all devices don't need to be powered on to use the last device in the chain. For the best result, and to avoid overstressing the FireWire port, connect one FireWire device to the Macintosh, then add one device at a time to the chain. Avoid plugging in live power adapters into devices connected to the chain."
However, after trying a LaCie d2 Quadra v3 and having it disconnect with an error after powering off the Lacie Hard Disk Quadra that was in front of it in the chain, I have come to the idea that maybe LaCie is not using chipsets designed according to the FireWire standard. When switching the order of the drves in the chain I obtained different yet still undesierable results. I tested a Maxtor FW 400 hard drive, and it allowed the drive behind it in the chain to mount without it being powered on, and when it was on then ejected and then powered off, the drive behind it was unaffected, so this drive must have been designed according to the FireWire standard.
the LaCie d2 Quadra v3 has some major issues that LaCie knows about, so I'm going to write that off as a messed up drive. But the Hard Disk Quadra is supposed to not have any issues, but I can't get drives behind it to mount when it hasn't been turned on, so I'm assuming that the chipset in it was not properly designed according to the FireWire standard.
Is anybody else having these issues with these same drives? What about with other brand drives? I'd like to know because I've heard on other posts that some work great and others don't, so I'd like to know which manufactures to stay away from if I plan on daisy chaining their drives.
Maybe its like with guitar effects pedals where you have true bypass with a DPDT switch, but not ture bypass with a SPDT switch? Maybe these power switches need to not have true bypass? I don't know and I'm sure that the circuitry of these drive chipsets is way more complex than that.
Lets somehow get a list going of FW 800 drives that do allow daisy chain passthrough with their power off.