On 10/04/12 12:21, Russell Coker wrote:
On Tue, 10 Apr 2012, Toby Corkindale<toby.corkindale@strategicdata.com.au> wrote:
What does the output of this look like on your drives?
smartctl -a /dev/sdb | grep Load_Cycle_Count
193 Load_Cycle_Count 0x0032 001 001 000 Old_age Always - 1284384
So if that's not lying (and SMART data is often false) then the drive would have spun down an average of about 30 times per hour during the life of the system.
Nope, it's not lying -- your drive really has spun down and up again 1.2 million times. The drives are specced as being good for 300k load cycles, so you've done well! But you're also living on borrowed time now.. Also consider that every time it spins up, you'll get a delay on that read or write, which *might* cause a RAID system to kick the drive out of the array, too.
I've just tried "hdparm -S0 /dev/sdb" but that hasn't stopped the Load Cycle Count from increasing. So it seems that your claims are correct.
I guess that my WD Green drive is just quiet enough that it can spin down and up without me noticing.
Yeah, they're good on the acoustic side of things, and they don't get too hot either, compared to 7200 rpm drives. If you pull the drive out and put your ear to it, you can clearly hear it spinning up and down though. Toby