On Mon, 27 Dec 1999, Priebe, Jason wrote:
It appears to me that, except for the 5V startup, the 9GB drives require _less_ power than the 4GB drives.
It does look like it from the specs, except for tthe 5V startup.
Can the power supply not deliver 1.2 amps at 5V to six drives?
Are you implying that you'd rather use 6 drives per shelf rather than 7? This would still put you over if the disks started up at the same time. 6 * 1.2 = 7.2 whereas 7 * 1.0 =, well, 7.0. OTOH I'm sure that the engineers put a bit more juice into the shelf than required. Also, see below.
Is startup power the power required to "spin up" the disks? In that case, isn't that power only delivered once at boot time?
In addition to this, if I remember correctly, the filer spins up disks sequentially, so there shouldn't be more than one disk drawing startup power at any one time.
Do the disks ever spin down in an active system?
I think they do when you do a disk swap.
Tom