On Thu, 15 Nov 2018 11:02:08 +0100, David Kastrup wrote:
Ralf Mardorf <ralf.mardorf(a)alice-dsl.net>
writes:
On Wed, 14 Nov 2018 16:17:43 -1000, David W.
Jones wrote:
The speed difference between that $50 spinning
disk and an SSD is
phenomenal.
It is and nobody should worry about "greatly reduced access speeds",
if the SSD has got no cache. With the SSDs I mentioned, I can turn on
the computer and use the display manager's greeter to log in after
around 2 seconds.
And your SSD does not have an internal cache? Are you sure about that?
Hi,
via a link provided by
https://ssd.toshiba-memory.com/en-amer/ssd/tr200:
" The SSD does not use a DRAM cache, instead it uses a chunk of its
NAND cells and invokes an SLC written cache to speed up the majority of
writes." -
https://www.guru3d.com/articles-pages/toshiba-tr200-ssd-960gb-review,5.html
This is
"reduced access speed" nearly nobody could notice, at least
not if you migrate from a HDD to such a SSD and neither for averaged
desktop work, nor for real-time audio work.
Real-time audio work does not mind disks braking transfer speeds to
Flash speeds, including the pauses for wear management, internal
allocation, block erasure?
HDDs do have internal management routines, too. Apart from a damaged
HDD, I never experienced a HDD, let alone a SSD, as a bottleneck when
doing real-time audio work. For everything I'm using HDDs and SSDs, I
either don't notice a different performance, since HDDs are already fast
enough, e.g. for real-time audio usage or SSDs are noticeable faster
than HDDs, e.g. when launching bloatware.
I've been caught out flat a lot fantasizing about
how I'd wanted to
imagine computing to be. I would recommend some restraint distributing
advice on that base.
On what SSD experiences do you base your recommendation?
I dropped all HDDs for Linux real-time audio, since the SSDs are silent
and I'm using an iPAD for real-time audio. Those are my experiences
with SSDs. I'm not aware that any issue I experienced with a recent
Linux install or my iPad was caused by a SSD and would have not happened
when using a HDD. For backups I'm using external HDDs, since they are
less expensive and because I don't know how safe a SSD is, when used as
a backup drive.
I don't know if the OP does expect a scientific investigation. I
mentioned my experiences, named the used SSDs and provided information
such as "host writes".
Regards,
Ralf