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From: Brad Campbell <brad@fnarfbargle.com>
To: Mikael Abrahamsson <swmike@swm.pp.se>
Cc: Jeremy Thompson <jeremythompson82@gmail.com>,
	Asdo <asdo@shiftmail.org>,
	linux-raid <linux-raid@vger.kernel.org>
Subject: Re: It is safe to stop Raid being reshaped
Date: Fri, 30 Dec 2011 14:19:15 +0800	[thread overview]
Message-ID: <4EFD57E3.7060905@fnarfbargle.com> (raw)
In-Reply-To: <alpine.DEB.2.00.1112300528300.808@uplift.swm.pp.se>

On 30/12/11 12:31, Mikael Abrahamsson wrote:
> On Thu, 29 Dec 2011, Jeremy Thompson wrote:
>
>> I thought about this as well - I have an Enermax 450 in there right now... I'll have to look for 
>> a higher watt power supply next I guess.
>
> Also look at how your feeds are balanced. Some PSUs have two rails, putting all drives on a single 
> rail causes your load handling capacity to go down significantly. I recommend getting a single 
> rail PSU as well, well above the capacity you think you need.
>
I made the move to a beefy single rail supply a few years ago. Wished I'd done it sooner.

I'm using two of these :

http://www.pcpower.com/power-supply/silencer-610-eps12v.html

Both machines have 6 core Phenoms with 16GB of ram.
Machine A has 15 7200RPM drives
Machine B has 10 7200RPM and 4 15000RPM Drives

The power supplies are well within limits, run cool and I've not had an issue since I upgraded to 
them a couple of years ago.

I do staggered spin-ups on machine B, but Machine A fires all drives at boot. They've been running 
in this configuration for about 4 years on these PSU's.

Regards,
Brad

  parent reply	other threads:[~2011-12-30  6:19 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-12-28 17:55 It is safe to stop Raid being reshaped Jeremy Thompson
2011-12-28 18:15 ` Gordon Henderson
2011-12-28 19:02 ` Asdo
2011-12-28 19:06   ` Jeremy Thompson
2011-12-29  2:02     ` Asdo
2011-12-29  2:23       ` Jeremy Thompson
2011-12-29 11:21         ` Gordon Henderson
2011-12-29 23:35         ` Brad Campbell
2011-12-29 23:37           ` Jeremy Thompson
2011-12-30  4:31             ` Mikael Abrahamsson
2011-12-30  4:31               ` Jeremy Thompson
2011-12-30  6:19               ` Brad Campbell [this message]
2011-12-30 12:16               ` Mattias Wadenstein
2011-12-30 14:51                 ` Krzysztof Adamski

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