dek_ml wrote:
Technically, I could see a setup where a RAID controller could monitor
activity, and if it hadn't been active for quite some time, spin the whole
cluster down. Since the machine sees the disk "through" the cache, and
blocks while waiting for data (don't know the timeout)
Mike Bilow wrote:
On Sat, 8 Apr 2000, Edward Schernau wrote:
Mike Bilow wrote:
Drives use by far more instantaneous current to spin up then they
need to
run in active idle mode. A big, modern IDE drive can consume
about 2.0A
[Excellent analysis trimmed]
Thanks!
I've discovered, the hard way, that slightly more money can get a lot
more quality out of your power supply. We're not talking hundreds extra
here, just buying something that everyone else respects and works with
over long terms.
I discovered 'cheap' power supplies sucked because I was running
Drives use by far more instantaneous current to spin up then they need to
run in active idle mode. A big, modern IDE drive can consume about 2.0A
to spin up, but probably no more than 0.5A to sit in active idle. (Note
that the "." is a decimal point; I'm in the USA.)
For example, I looked up
On Sat, 8 Apr 2000, Edward Schernau wrote:
Mike Bilow wrote:
Drives use by far more instantaneous current to spin up then they
need to
run in active idle mode. A big, modern IDE drive can consume
about 2.0A
[Excellent analysis trimmed]
Thanks!
Nowadays I think the "danger" comes
One argument against spinning the disk down, is the on/of power cycles can
kill it faster than just leaving it on... Just like a light bulb.
At 12:17 PM 4/8/00, dek_ml wrote:
On Sat, 8 Apr 2000, Mike Bilow wrote:
Why on earth would you even bother with RAID on a machine which can
Sven Kirmess wrote:
I'm playing a bit with Linux RAID and now I have a question about the
power supply. When I use 3 or 4 modern IDE drives I guess they will
consume a lot of energy.
Do I need a special power supply like 300 W or what are you using?
A high capacity PS is always good to
I'm playing a bit with Linux RAID and now I have a question about the
power supply. When I use 3 or 4 modern IDE drives I guess they will
consume a lot of energy.
Cranking up 10K RPM drives will require substantial power. A real crude
yardstick is that the 1.0 inch high drives will take less
Thursday, April 06, 2000, 6:36:39 PM, David wrote:
What about "IDE power down when idle"? Can this blow up the power
supply or crash the system when turning on 4 disks simultaneous?
You don't want to use "power down when idle" on drives in a RAID...
Why not? I think about power down after
Thursday, April 06, 2000, 6:44:49 PM, Ed wrote:
Do I need a special power supply like 300 W or what are you using?
A high capacity PS is always good to have, esp. in a high uptime
box. Having that extra wattage available can prevent power dips
from making things flake out.
What about the
On Thu, 06 Apr 2000, Sven Kirmess wrote:
Thursday, April 06, 2000, 6:36:39 PM, David wrote:
What about "IDE power down when idle"? Can this blow up the power
supply or crash the system when turning on 4 disks simultaneous?
You don't want to use "power down when idle" on drives in a
Thursday, April 06, 2000, 10:08:59 PM, Jakob wrote:
Sorry, but I have to say it. Very, very good HOWTO. Thanks.
Why not? I think about power down after e.g. 30' idle time. Not
after a few seconds... What's the Problem with RAID? Does it mark
all disks as bad if they don't come up fast
On Fri, 07 Apr 2000, Sven Kirmess wrote:
Thursday, April 06, 2000, 10:08:59 PM, Jakob wrote:
Sorry, but I have to say it. Very, very good HOWTO. Thanks.
*Blush*:)
Why not? I think about power down after e.g. 30' idle time. Not
after a few seconds... What's the Problem with RAID?
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