Most energy efficient (home) setup

Henk Hesselink nanog at
Mon Apr 16 13:22:20 CDT 2012

Have you looked at the HP ProLiant MicroServer?



On 13-04-12 12:06, Jeroen van Aart wrote:
> Leo Bicknell wrote:
>> But what's really missing is storage management. RAID5 (and similar)
>> require all drives to be online all the time. I'd love an intelligent
>> file system that could spin down drives when not in use, and even for
>> many workloads spin up only a portion of the drives. It's easy to
>> imagine a system with a small SSD and a pair of disks. Reads spin one
>> disk. Writes go to that disk and the SSD until there are enough, which
>> spins up the second drive and writes them out as a proper mirror. In a
>> home file server drive motors, time you have 4-6 drives, eat most of the
>> power. CPU's speed step down nicely, drives don't.
> Late reply by me, but excellent points.
> A combination of mdadm and hdparm on linux should suffice to have a raid
> that will spin down the disks when not in use. I have used for years a
> G4 system with a mdadm raid1 (and a separate boot disk) and hdparm
> configured to spin the raid disks down after 10 minutes and it worked
> great.
> I think in a raid10 this would only spin up the disk pair that has the
> data you need, but leave the rest asleep. But I didn't try that yet.
> What I'd like is to have small disk enclosuer that includes a whole (low
> power) computer capable of having linux installed on some flash memory.
> Say you have an enclosure with space for 4 2.5 inch disks, install
> linux, set it up as a raid10, connect through USB to your computer for
> back up purposes.
> Greetings,
> Jeroen

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