Re: Shutdown - 25 Years Later

Sujet : Re: Shutdown - 25 Years Later
De : robin_listas (at) *nospam* es.invalid (Carlos E.R.)
Groupes : comp.os.linux.misc
Date : 23. Apr 2025, 12:35:14

Autres entêtes

Message-ID : <isvmdlxre2.ln2@Telcontar.valinor>
References : 1 2 3 4 5 6 7 8 9 10 11 12
User-Agent : Mozilla Thunderbird

On 2025-04-23 00:43, Lawrence D'Oliveiro wrote:

On Tue, 22 Apr 2025 10:35:48 +0200, Carlos E.R. wrote:

... I think it’s a dumb idea for drives to have their own cache.
>
Not at all. There is a huge speed improvement.
Not as fast as the OS can achieve by caching things in main RAM.
Remember, the on-drive cache is on the wrong side of an interface (SATA,
NVME etc) that is not designed to run at main RAM speeds. Whereas the
interface between CPU and main RAM is. That’s why on-drive cache is a
waste of time.

The on drive cache is on the right side to take advantage of the drive own algorithms to move the head. The firmware takes decisions on where sectors actually are, and what sectors to actually read or write and in what order. The operating system doesn't have actual knowledge of the internal layout of the disk platters and can not optimize for the actual situation.
--
Cheers, Carlos.

Date	Sujet	#	Auteur
18 Apr 25	Re: Shutdown - 25 Years Later	49	Eli the Bearded
18 Apr 25	Re: Shutdown - 25 Years Later	3	Lawrence D'Oliveiro
18 Apr 25	Re: Shutdown - 25 Years Later	2	Eli the Bearded
18 Apr 25	Re: Shutdown - 25 Years Later	1	Lawrence D'Oliveiro
18 Apr 25	Re: Shutdown - 25 Years Later	45	Andy Burns
18 Apr 25	Re: Shutdown - 25 Years Later	42	Lawrence D'Oliveiro
19 Apr 25	Re: Shutdown - 25 Years Later	41	Jim Jackson
19 Apr 25	Re: Shutdown - 25 Years Later	1	Lawrence D'Oliveiro
20 Apr 25	Re: Shutdown - 25 Years Later	39	Richard Kettlewell
20 Apr 25	Re: Shutdown - 25 Years Later	1	The Natural Philosopher
20 Apr 25	Re: Shutdown - 25 Years Later	37	Pancho
20 Apr 25	Re: Shutdown - 25 Years Later	1	Richard Kettlewell
20 Apr 25	Re: Shutdown - 25 Years Later	35	Computer Nerd Kev
20 Apr 25	Re: Shutdown - 25 Years Later	1	Computer Nerd Kev
21 Apr 25	Re: Shutdown - 25 Years Later	33	Lawrence D'Oliveiro
22 Apr 25	Re: Shutdown - 25 Years Later	32	Carlos E.R.
22 Apr 25	Re: Shutdown - 25 Years Later	22	The Natural Philosopher
22 Apr 25	Re: Shutdown - 25 Years Later	17	Carlos E.R.
22 Apr 25	Re: Shutdown - 25 Years Later	1	Pancho
22 Apr 25	Re: Shutdown - 25 Years Later	15	The Natural Philosopher
22 Apr 25	Re: Shutdown - 25 Years Later	4	Pancho
22 Apr 25	Re: Shutdown - 25 Years Later	2	The Natural Philosopher
23 Apr 25	Re: Shutdown - 25 Years Later	1	Pancho
22 Apr 25	Re: Shutdown - 25 Years Later	1	Lawrence D'Oliveiro
23 Apr 25	Re: Shutdown - 25 Years Later	10	candycanearter07
24 Apr 25	Re: Shutdown - 25 Years Later	9	Lawrence D'Oliveiro
25 Apr 25	Re: Shutdown - 25 Years Later	8	candycanearter07
26 Apr 25	Re: Shutdown - 25 Years Later	7	Lawrence D'Oliveiro
28 Apr 25	Re: Shutdown - 25 Years Later	6	John Ames
28 Apr 25	Re: Shutdown - 25 Years Later	4	Richard Kettlewell
29 Apr 25	Re: Shutdown - 25 Years Later	3	The Natural Philosopher
29 Apr 25	Re: Shutdown - 25 Years Later	2	Richard Kettlewell
29 Apr 25	Re: Shutdown - 25 Years Later	1	The Natural Philosopher
29 Apr 25	Re: Shutdown - 25 Years Later	1	Lawrence D'Oliveiro
22 Apr 25	Re: Shutdown - 25 Years Later	3	Richard Kettlewell
22 Apr 25	Re: Shutdown - 25 Years Later	1	Lawrence D'Oliveiro
23 Apr 25	Re: Shutdown - 25 Years Later	1	The Natural Philosopher
22 Apr 25	Re: Shutdown - 25 Years Later	1	Lawrence D'Oliveiro
22 Apr 25	Re: Shutdown - 25 Years Later	9	Lawrence D'Oliveiro
23 Apr 25	Re: Shutdown - 25 Years Later	8	Carlos E.R.
24 Apr 25	Re: Shutdown - 25 Years Later	7	Lawrence D'Oliveiro
25 Apr 25	Re: Shutdown - 25 Years Later	6	Carlos E.R.
26 Apr 25	Re: Shutdown - 25 Years Later	1	Lawrence D'Oliveiro
26 Apr 25	Re: Shutdown - 25 Years Later	4	The Natural Philosopher
26 Apr 25	Re: Shutdown - 25 Years Later	2	Richard Kettlewell
26 Apr 25	Re: Shutdown - 25 Years Later	1	Lawrence D'Oliveiro
26 Apr 25	Re: Shutdown - 25 Years Later	1	Lawrence D'Oliveiro
18 Apr 25	Re: Shutdown - 25 Years Later	2	The Natural Philosopher
19 Apr 25	Re: Shutdown - 25 Years Later	1	Lawrence D'Oliveiro

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