[mythtv-users] Spin up delay for HDDs
ramonhofer at bluewin.ch
Sun Sep 25 18:08:12 UTC 2011
On Sun, 25 Sep 2011 12:06:13 -0400
Raymond Wagner <raymond at wagnerrp.com> wrote:
> On 9/25/2011 11:35, Ramon Hofer wrote:
> > I'm concerned about my PSU. It's 460 W and in my server are already
> > 6 HDDs.
> > My idea was to delay the spin up of the HDDs.
> > I have a Netgear ReadyNAS which spins up the discs one after the
> > other. Google couldn't tell me how to do this manually. I only
> > found that some HDDs have jumpers that can be set to delay the
> > spining up.
> What you're talking about is called Power Up In Standby.
Thanks for the link.
Corresponding to the article the BIOS needs to support PUIS but it
tells that usually only RAID controllers support it. Therefore I
suppose the SATA controller I mentioned (Exsys EX-3403) nor my
main board (Asus P7P55D) supports it.
Beside the price I don't want to use a hardware RAID card because if it
breaks there may be no replacement for the controller.
> My RAID card has an option for staggered spinup, but I've never seen
> that option in any other hardware. On the handful of drives I have
> that support it using a jumper, attempting to do so simply resulted
> in them not being recognized by the card. Right now, I've got a 650W
> power supply for fourteen drives, the RAID card, 4G of DDR3, and a
> dual core Phenom II. With all drives spun up, I'm pulling maybe
> 150W, but I've just barely enough power to boot.
> A previous incarnation used an old, power hungry, dual core Opteron,
> with 2GB of DDR1, Geforce 6500, and the same drives and RAID card.
> With the increased draw from the processor, memory, and graphics, the
> drives were starved and not all would spin up. I frequently would
> have to manually stagger the startup using the power buttons on the
> front of my hotswap bays.
At the moment I have a 2.5" drive for the system and five 3.5" driver
plus (in future up to) eight 3.5" drives which are fourteen too.
I have no graphics card in it but 2 TV cards. As you 4 GB DDR3 and an i3
I wont buy all the eight drives at once. So I think I'll keep my PSU
and go for a bigger one when I have more drives.
> If you've got a bit of electronics capability or inclination, you
> might want to check out this project.
> It uses a little microcontroller to manage staggered spinup from a
> series of relays, and hooks into your motherboard reset button to
> prevent it from POSTing until the hard drives have finished doing
> their thing.
But the downside is that I can't spin down the discs and sequentially
spin them up when they're needed again while the system is running.
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