[Bug 59695] Re: High frequency of load/unload cycles on some hard disks may shorten lifetime

[Michał Gołębiowski]

@ Steve Langasek
I tried it. I wrote a script that checks the Load_Cycle_Count number and writes with the actual date to the log file. I executed this script periodically (and between those executions I did nothing), and this is the output:

### AC ON
09.01.11 05:24:39 116203
### AC OFF
09.01.11 05:25:17 116208

It worried me a lot, as in 30 seconds it raised by 5! I thought it's not
fixed. Though later...

09.01.11 05:26:41 116216
09.01.11 05:27:22 116217
09.01.11 05:28:49 116217
09.01.11 05:29:31 116217
09.01.11 05:36:09 116217
09.01.11 05:48:03 116217
09.01.11 05:56:22 116217
### AC ON
09.01.11 05:56:36 116217
09.01.11 05:57:22 116217
09.01.11 06:06:02 116217
### AC OFF
09.01.11 06:07:07 116217
09.01.11 06:15:37 116217

reboot...

### AC ON
09.01.11 06:26:56 116219
### AC OFF
09.01.11 06:27:20 116219
09.01.11 06:42:20 116219

As You can see, later even after 25 (sic!) minutes of not doing nothing
the counter didn't raise even once.

So there are 2 questions:
1) Why the counter raised so quickly at the first time I unplugged AC power? Is it normal?
2) Shouldn't my HDD park at least once per 15 minutes? I thought that a fix should make parking less often, but not to switch it off completely...

Or maybe I'm wrong and it's ok? Waiting for Your opinions...

-- 
High frequency of load/unload cycles on some hard disks may shorten lifetime
https://bugs.launchpad.net/bugs/59695
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