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Set Automatic Acoustic Management level on hard drives
Hello
I love to hear that it did work for you. Hated the continuous parking too, and turned it off altogether (not in OFW). Maybe the mini relies on it more for thermal reasons or so (just a thought). Regarding your first question about restoring to factory settings:
According to the ATA (draft-)standard, the AAM is only active when it "has been enabled", which seems to imply to me that it is disabled initially (my new, unchanged drive confirms this). Therefore, disabling AAM should do it.
A little bit of confusion comes from the presence of a "vendor recommended value" for the AAM setting, and the spurious mention of a "default value", which might be that recommended value, especially as it does not seem to be specified (even mentioned) anywhere else in the text. And then there is the value zero for "vendor specific value". Therefore, disabling AAM should still do it. ..unless the HD doesn't implement it (even if enabling is implemented, disabling might not be, according to the standard).. A possible fallback option would be setting AAM to zero, but i doubt there's a drive implementing only one of them. Code Time! Disable AAM for boot-disk (by its devalias "hd"):
Fallback option: Set AAM value of boot-disk to "vendor specific" (i.e. 00)
The settings stick, at least the AAM stuff and other drive settings. Question 3 is easy: You have to run the command on each new drive (once). BTW: The commands can be put into text files, and be run from the OFW prompt, e.g.: ----- save following lines to file "aamoff.of" at the root dir of your boot volume
-------
This might be handy, because it also has the docs built in :-) The file for turning AAM on, and doing the same for drive 2 is left as a homework ;-)
Cheers, |
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