Tejun Heo wrote:
> Michael Sedkowski wrote:
> > Dnia 07-08-2007, Wt o godzinie 15:56 +0900, Tejun Heo napisał(a):
> >> 192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age
> >> Always - 388
[snip]
> On power off, the r/w heads in a disk should be unloaded (parked). This
> is usually achieved by either putting the disk into standby/sleep mode
> during shutdown. However, all modern disks can automatically unload
> their heads when the power is removed abruptly. This is called
> emergency unload. Emergency unload does shorten the lifespan of the
> disk but you don't have to worry too much about it. Disks are designed
> to withstand certain number of emergency unloads.
Out of interest, does Power-Off_Retract_Count attribute only record emergency unloads
rather than normal power off by Linux shutdown command?
Thanks in advance,
Sam
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