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From: The Natural Philosopher <tnp@invalid.invalid>
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Move bookworm system from SSD to NVME
Date: Fri, 2 Aug 2024 15:12:57 +0100
Organization: A little, after lunch
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On 02/08/2024 15:03, Björn Lundin wrote:
> On 2024-08-02 14:51, The Natural Philosopher wrote:
> 
>> Never mind sync.
>>
>> It's important to wait anyway on an SSD/nvm until it has finished its 
>> internal business.
>>
>> For any copy process.
> 
> 
> dd'ing 500 Gb to an ssd disk, I've seen sync taking 30 s or more
> and sync is of course started AFTER dd is done
> 
> So - how do you know it is done its internal business?
> Not all drives have blinking LEDs
> 
> sync makes it easy to know
> 
> 
Even sync may not be enough.
SSDS/NVM have their own internal  caching.

-- 
"In our post-modern world, climate science is not powerful because it is 
true: it is true because it is powerful."

Lucas Bergkamp