You could easily do this in Solaris today by just using power.conf(4).
Just have it spin down any drives that have been idle for a day or more.

The periodic testing part would be an interesting project to kick off.


--Bill


On Mon, Jan 29, 2007 at 08:21:16PM -0200, Toby Thain wrote:
> Hi,
> 
> This is not exactly ZFS specific, but this still seems like a  
> fruitful place to ask.
> 
> It occurred to me today that hot spares could sit in standby (spun  
> down) until needed (I know ATA can do this, I'm supposing SCSI does  
> too, but I haven't looked at a spec recently). Does anybody do this?  
> Or does everybody do this already?
> 
> Does the tub curve (chance of early life failure) imply that hot  
> spares should be burned in, instead of sitting there doing nothing  
> from new? Just like a data disk, seems to me you'd want to know if a  
> hot spare fails while waiting to be swapped in. Do they get tested  
> periodically?
> 
> --Toby
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