Re: drive beat frequency in RAID setup, anything to worry about?
- From: Arno Wagner <me@xxxxxxxxxxx>
- Date: 28 Nov 2005 02:04:10 GMT
Previously gavin@xxxxxxxxxxx wrote:
> Hi all,
> I have recently installed 2 new drives to create a RAID 0 setup. Since
> doing so I hear this "throbbing" sound and am pretty sure its caused by
> the two drives spinning at slightly different speeds creating a beat
> frequency... (correct me if I am wrong)
You get to hear die difference in the frequencies. Same effect used
to tune a sting instrument using a tuning fork, e.g..
> I have moved the disks about the case a little but all that does is
> change the sound a little, it does not go away...
It will not, unless you do good mechanical decoupling.
The thing that would have been nice is if these drives had a
''sync'' pin, that you can connect together for all drives
and then they run syncronously. That would eliminate the effect.
Unfortunately nobody seems to care enough.
> I can live with the noise (I think) since I have music on anyway most
> of the time! However, can this throbbing sound cause any problems for
> my disks? I *think* drives can take a fair bit of vibration but I
> wanted some other opinions :-)
The effect is not strong enough to cause problems if the drives
are healthy. They are designed to be used in ''packs''. Some
cases give you one or two ''cages'' to mount three disks in.
There is no indication of this coausing problems with vibration.
Arno
.
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