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Originally Posted by rpmurray
The only information I've been able to find out about the power supply in the 4000 is that it's a 3P Pacific Power Products Model No PRO 120-3. It produces +5V 12.0 A; +12V 6.0 A; -12V 0.5 A.
The power supply in the 4100 is an EMACS MPW-6150F. It produces +5V 10.0 A; +12V 6.0 A; -12V 1.0 A.
Startup current for the Seagates 500GB is 2.6 amps, 11 secs from power on to ready. Looks like the SATAs draw an extra 0.2 amps on startup.
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This would seem to indicate that with the Seagate 500's we would need 10.4 A; for 11 seconds; PEAK power, from the 4000 Power Supply. We know (I think) that this doesn't work, so we know the 4000 PS wil not deliver that much for that long.
It would also indicate that the 4000 PS can deleiver 8.8 A; for 11 seconds; PEAK power. This is derived from the 26.4 watts (2.2 A) each from the Seagate 250 drives that seem to work. 2.2 A x 4 = 8.8 A
We are bracketing it here. At least 8.8A but not 10.4 A. This is why I was asking if anyone had more data on what worked and didn't (we might be able to bracket it further).