Interesting Problem

[Fred Cannons]

Caution - this is longwinded- apologies!
I have just upgraded my CPU to a G4 Quicksilver and have bought 2 x 36G Seagate Cheetah "hot swap" drives for a new project. My previous CPU was a G3 beige desktop. PCI cards are: Atto single SCSI accelerator; ATI Graphics card for running a second monitor and Magma expansion chassis PCI card.
I also have a Sony DDS4 for back-up via Retrospect 4.3.
1st day of recording went glitch free. 2nd day of recording - well I had to send everyone home!! First problem (and still existing) is I cannot back-up from either 36g drive to DDS4. I also have an 18g drive in the same chassis as the 36g and that works fine. Next problem was I couldn't record anything. I found out that I could inly use one type of PCI card for running 2 monitors with the G4 - all others would make the system un-operative. I installed an Appion Jeronimo PCI card. System records fine now but the DDS4 problem still exists. I have updated the Sony DDS firmware - still no joy. I have tested my RAM cards - no problem there. I have run Norton 6.0 - no problems.
Has anyone come across this strange problem?
My gut feeling is that I should be using a dual Atto acceleration card but nobody I have talked to tech wise has come up with that.
Help very much appreciated.

[drumpro77]

Try removing the older 18gig from the other bay. Even if it isn't spun up. I had a similar situation last week where this curred the problem. Let me know if it works.

[tal herzberg]

strangley enough, I have experienced only troubles whenever I used 36gb cheetah drives, on 4 different projects. 18gb cheetah drives are great, 72gb cheetah's are the best.

[Bill Rigby]

Similar Problem..........
Tried backing up from my 18 gig drives (cheetah) to my Firewire Superdisk (DVDR).
The only work around Ive found is to copy it to a backup IDE and then burn ....very irritating.
The actual problem is the SCSI loses communication during the burn.
I have the same setup as you except my mac is a Dual 450

[Fred Cannons]

Thanks DrumPro77 for your suggestion. Unfortunately it didn't work. Same problem. I can't even copy from one drive to another now (36g to 19g) without the system locking up.