Do SSDs do garbage collection on shutdown?

Hugo Drax

Diamond Member
Nov 20, 2011
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I noticed when I shut down my computer, the computer etc.. shuts down but the PC powerlight is lit for about 60-90 seconds post shutdown and lots of drive activity.
 

Engineer

Elite Member
Oct 9, 1999
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I noticed when I shut down my computer, the computer etc.. shuts down but the PC powerlight is lit for about 60-90 seconds post shutdown and lots of drive activity.

I don't ever recall the PC staying on for the drive to do its' work. Seems that would be a "Windows" thing keeping the PC awake until it is finished shutting down. :hmm:
 

nickbits

Diamond Member
Mar 10, 2008
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That is most likely the hybrid sleep at work. Windows saves its ram to disk when sleeping so if there is a power loss it can still resume. It can be shut off in power options/advanced settings.
 

BrightCandle

Diamond Member
Mar 15, 2007
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Is not the SSD keeping the machine alive it must be hibernate or something like it. The SSD garbage collects continuously (effectively), if you shut it down mid process it will just continue on when you give the drive power again.
 

Kougar

Senior member
Apr 25, 2002
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For most SSDs garbage collection tends to only run when the drive is mostly or completely idle. It will never delay shutdown and only runs in the background.

That sounds like Windows is either finishing applying updates or busy paging a backlog of stuff out of memory. A lot of Windows updates seem to require a 30-60 second wait right before shutdown these days.