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Model #ST31000340NS
You can find the technical specifications here, by selecting "1 TB" and "SATA 3.0Gb/s" in the drop-down lists. (I am asking this question because I don't really understand what many of these specs mean, or how they may apply.)
I need to know the maximum wattage any one of these drives can require at any time. I am using this factor as I shop for a power supply that can handle five of these drives in RAID 5.
Giffyguy
Posted 2009-10-01T03:52:18.517
Reputation: 782
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According to the ES.2 Data Sheet (PDF link in the middle of the page), the typical power draw is 11.6 W for SATA and 12.5 W for Serial-Attached SCSI.
Give it a +30% safety buffer, and you would be looking at about 15W per drive, which means that for five of these drives, it will be 75W.
caliban
Posted 2009-10-01T03:52:18.517
Reputation: 18 979
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According to the Product Manual, spin-up power is 3 A (peak) from the 12 V rail or 36W for 1 drive and 180 W for 5 drives.
This is the max power number you want to use if all these will power up at the same time (which they are). If you use 15 W per drive and have no headroom in the PSU, you may run into problems powering it up.
This also more closely matches the Newegg which adds 39W per 7200-rpm 3.5" HDD.
hanleyp
Posted 2009-10-01T03:52:18.517
Reputation: 6 519
No worries. You can also use the Newegg Power Calculator to find out exactly what PSU rating you should get. http://educations.newegg.com/tool/psucalc/index.html
– caliban – 2009-10-01T04:11:00.120