On Tue, 23 Dec 2008, Matt Garman wrote:
Anyway, I haven't been able to find a conclusive answer to this on the
web. Just wondering if anyone on the list has any more info.
I bought a couple of drives ~8 months ago. They started racking up
Load_Cycle_Counts, so I used wdidle3.exe to shut it off (I think they were
up to 8k load cycle counts in the first couple of days).
I then purchased two new drives 1-2 months ago. Didn't do anything to
them, but they seem to have different factory settings:
$ sudo smartctl -a /dev/sdb | egrep 'Power_On|Load_Cycle'
9 Power_On_Hours 0x0032 099 099 000 Old_age Always - 1031
193 Load_Cycle_Count 0x0032 197 197 000 Old_age Always - 11184
$ sudo smartctl -a /dev/sdc | egrep 'Power_On|Load_Cycle'
9 Power_On_Hours 0x0032 093 093 000 Old_age Always - 5329
193 Load_Cycle_Count 0x0032 188 188 000 Old_age Always - 38070
sdb is one of the newer drives, sdc is one of the older ones.
So wdidle3.exe seems to shut off the mechanism that causes
Load_Cycle_Count to rise quickly, more agressively than the new factory
defaults, but the new factory defaults at least mean the drive gets an
estimated life time of 3 years before they reach 300k Load_Cycle_Counts,
in my environment.
Both drives show same firmware and model numbers.
--
Mikael Abrahamsson email: swmike@xxxxxxxxx
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
