On Wednesday 23,February,2011 12:26 AM, Phillip Susi wrote: > On 2/22/2011 10:44 AM, Chow Loong Jin wrote: >> My previously mentioned point still stands though. Many people close the lid >> of >> the laptop, stick it into a bag, and start walking. Considering the I/O >> intensive nature of the hibernation process, that practice can damage the >> hard >> disk pretty much. > > Laptop hard disks are generally built to withstand this. Whenever my > wife moves her macbook around too much I can hear the distinctive click > of the emergency head unload. This also is of course, not an issue when > the default lid action is to suspend rather than hibernate.
My first laptop hard disk burnt out after a year, and a month or so (warranty period + one month, what nice timing). The emergency head unloading feature isn't invulnerable, you know. Ever since then, I've taken care to avoid moving the laptop when hibernating. >> The gauge isn't broken. Well, not completely, anyway. The only issue is that >> it >> jumps from 5% directly to 0% without passing 4%-1%. But on the other hand, >> while >> there's enough power to last for half a day without running out of battery, >> there isn't always enough power to finish hibernation before it keels over >> and >> dies (starting from 0%). > > It sounds like it is estimating 5% remaining capacity, then realizes > that, based on the terminal voltage, the battery is actually dead. > Hence, it needs a good calibration cycle. If "a good calibration cycle" is equivalent to letting the battery completely burn out, then yes, I've done that. > [...] -- Kind regards, Loong Jin
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