Re: Data migration for replacing HDD with SSD - suggestions?

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On Sun, Dec 17, 2017 at 4:10 PM, Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote:

>
> As for a smaller SSD just for booting, there's a tiny advantage in
> that it's physically separate so if you're at all prone to making CLI
> mistakes, there can be an isolation advantage. But as far as
> performance, no not really. GPT supports 128+ partitions, and LVM is
> in somewhere into the stratosphere beyond that many. So with either
> conventional partitions, or LVM (or Btrfs subvolumes) there are many
> ways to segment your SSD however you want.

Anecdote:

Just today I switched things around on my Intel NUC. It has a 1TB HDD
used for data subvolumes mount in /srv and shared with samba. But also
is carved up with LVM for VM stuff and throw away block devices for
testing. And carved up with a few conventional partitions for
/boot/efi, /boot, and /. The HDD's biggest drawback is latency (both
head seek latency and rotational latency). So I just moved the boot
related stuff over to a Samsung SDXC Card. The sequential performance
of the SD Card is a bit less than the HDD, but boot times, and system
update times, are much shorter (almost 1/2) due to the difference in
latency. The other advantage, I could now spin down the 1TB laptop HDD
in this NUC, since this little server isn't used every day. Now that
there's no system or logs going to the HDD, it will go to sleep.


Chris Murphy
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