In article <mrdelurk-4216A6.21531030102007@[EMAIL PROTECTED]
>,
George K. <mrdelurk@[EMAIL PROTECTED]
> wrote:
> But now that I'm trying to add the next 2 Seagate 750's following the
> same system, for a total of seven - no dice. One of more of the HDs
> always vanishes. Formatting of the new drives fails. Swapping cables
> and FireWire ****ts solves nothing.
do you have top quality firewire cabling?
> My only hunch for now is that perhaps the 300 Watt power supply in my
> enclosure is too weak to run more than five 750 Giggers along with
> their 10 cooling fans, hence all these weird problems, caused by power
> fluctuation.
that's my first guess.
> Perhaps i should plug a voltmeter into one of the
> remaining empty HD power plugs and measure what I get, as compared to
> the Seagate's +5V 0.72A and +12V 0.52A specs, printed on the label?
> (Then again, it's only a hunch...)
that's not spin-up power. i can't find the spec for spin-up power for
that drive at seagate.com but i checked a hitachi drive and it needed
+12v @[EMAIL PROTECTED]
2a and +5 @[EMAIL PROTECTED]
1.2a. that's 30 watts right there, times nine
drives is 270 watts, plus the fans, so a power issue is quite likely.
can you stagger the spin-ups so it doesn't tax the power supply?
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