Re: [gentoo-user] Copying root to SSD in one go...a good idea...or?

[Michael <confabulate@kintzios.com>]

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On Sunday, 5 April 2020 18:54:25 BST tuxic@posteo.de wrote:
> On 04/05 10:33, Mark Knecht wrote:
> > On Sun, Apr 5, 2020 at 10:13 AM <tuxic@posteo.de> wrote:
> > > Hi,
> > > 
> > > currentlu I am preparing a new Gentoo Linux by compiling all
> > > the application I had on my old system.
> > > 
> > > Due to delivery problems (corona) my SSD was delivered today
> > > (or yesterday...it depends...;) .
> > > 
> > > When the whole compilation has finished and the system boots it
> > > needs to be transfered to the SSD.
> > > 
> > > The SSD has a heat spreader...so it gets hot, when used.
> > > 
> > > Is it wise to copy the whole root system to the SSD in one go
> > > in respect to a not so healthy heat increase?
> > > 
> > > And if not...how can I copy the root system in portions
> > > to the SSD and do not miss anything?
> > > 
> > > Are there SDD-friendly and SSD-unfriendlu methods of copying
> > > greater chunks of data to a SSD (rsync, tar-pipe, cp....)?
> > > What is recommended here?
> > > 
> > > Thanks a lot for any help for a SSD newbie in advance!
> > > 
> > > Cheers! And stay heathy!
> > > Meino
> > 
> > Just my 2 cents...
> > 
> > If the SSD cannot survive having data copied to it there's something
> > seriously wrong with the drive. I don't think you should be overly worried
> > about this but I do understand it's new technology so you want to be
> > careful. Bravo for that.
> > 
> > Possibly to ease your concerns a little bit use smartctl -a /dev/SSD and
> > get to know your drive that way. You can most likely watch the drive temp
> > as recorded by the drive.
> > 
> > Best wishes,
> > Mark
> 
> Hi Mark,
> 
> Yes, if a SSD could not survive writes, something is wrong with the
> SSD. But that was not my point.
> Copying about 100GB (roughly guessed) data in one go to the SSD is a
> use case, which is not common. And therefore possibly not taken into
> account by the company, which create that SSD.
> SSDs can create noticeable heat (mine has a minimalistic heat
> spreader therefore. Faster SSDs come with a substancial heatspreader).
> 
> Smartctl will report problems when they are already there.
> I want to prevent problems beforehand.
> 
> So -- does copying about 100 GB creates so much heat in the sillicone
> of the SSD, that it ages more than preferred?
> 
> And if so, how can I prevent it by appluing other techniques to copy
> the data?
> See additional questions in my initial posting for that.

With rsync you could add the option:

--bwlimit=RATE          limit socket I/O bandwidth

and select a low enough bandwidth limit to keep the packets flowing at a low 
rate to remain cool enough for your liking.  

However, I'll echo what other have said about not worrying about these things.  
The OEMs must run some rudimentary tests to establish performance envelopes 
and keep everything tuned just so.

Nevertheless, if you do not trust them to produce the best quality products, 
then we share something in common!  LOL!

In this case, you may want to open the PC case and use a desktop fan to keep 
the interior of the case even cooler than usual, during your copying process.

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