On Wed, Oct 15, 2008 at 4:12 PM, Will Murnane <[EMAIL PROTECTED]> wrote: > On Wed, Oct 15, 2008 at 18:30, Scott Laird <[EMAIL PROTECTED]> wrote: >> Oh, also I kind of doubt that a 750W power supply will spin 16 disks >> up reliably. I have 10 in mine with a 600W supply, and it's >> borderline--10 drives work, 11 doesn't, and adding a couple extra PCI >> cards has pushed mine over the edge before. > Power supply stress survival is more a function of dollars paid (or > pounds weighed, if you like) than of any of the numbers on the box. > I've done 14 drives on a 550W power supply (with no problems). > Reputable places to search for power supply reviews are [1] and [2] > (and others---but those are a good start). > >> Most 3.5" drives want >> about 30W at startup; that'd be around 780W with 16 drives. > I'm not sure what kind of math you're using here.
See http://www.seagate.com/staticfiles/support/disc/manuals/desktop/Barracuda%207200.11/100452348b.pdf Seagate claims 2.8A @ 12V per drive at startup. That's 33.6W. The operating draw is way lower--the last time I measured my E2160 + 10 disk system drew around 130W while idling and not a whole lot more while active. Scott _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
