Re: Shutdown - 25 Years Later

From	"Carlos E.R." <robin_listas@es.invalid>
Newsgroups	comp.os.linux.misc
Subject	Re: Shutdown - 25 Years Later
Date	2025-04-23 13:35 +0200
Message-ID	<isvmdlxre2.ln2@Telcontar.valinor> (permalink)
References	(7 earlier) <vu2lpn$3mfun$1@dont-email.me> <68057416@news.ausics.net> <vu43gk$ucll$1@dont-email.me> <401kdlxknd.ln2@Telcontar.valinor> <vu9632$1iohp$2@dont-email.me>

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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.

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Shutdown - 25 Years Later Farley Flud <ff@linux.rocks> - 2025-04-16 14:32 +0000
  Re: Shutdown - 25 Years Later Eli the Bearded <*@eli.users.panix.com> - 2025-04-18 04:34 +0000
    Re: Shutdown - 25 Years Later Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-18 05:56 +0000
      Re: Shutdown - 25 Years Later Eli the Bearded <*@eli.users.panix.com> - 2025-04-18 06:38 +0000
        Re: Shutdown - 25 Years Later Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-18 08:15 +0000
    Re: Shutdown - 25 Years Later Andy Burns <usenet@andyburns.uk> - 2025-04-18 08:53 +0100
      Re: Shutdown - 25 Years Later Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-18 08:16 +0000
        Re: Shutdown - 25 Years Later Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2025-04-19 14:19 +0000
          Re: Shutdown - 25 Years Later Jim Jackson <jj@franjam.org.uk> - 2025-04-19 21:10 +0000
            Re: Shutdown - 25 Years Later Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-19 22:22 +0000
            Re: Shutdown - 25 Years Later Richard Kettlewell <invalid@invalid.invalid> - 2025-04-20 08:13 +0100
              Re: Shutdown - 25 Years Later The Natural Philosopher <tnp@invalid.invalid> - 2025-04-20 10:31 +0100
              Re: Shutdown - 25 Years Later Pancho <Pancho.Jones@protonmail.com> - 2025-04-20 12:28 +0100
                Re: Shutdown - 25 Years Later Richard Kettlewell <invalid@invalid.invalid> - 2025-04-20 20:44 +0100
                Re: Shutdown - 25 Years Later not@telling.you.invalid (Computer Nerd Kev) - 2025-04-21 08:24 +1000
                Re: Shutdown - 25 Years Later not@telling.you.invalid (Computer Nerd Kev) - 2025-04-21 08:28 +1000
                Re: Shutdown - 25 Years Later Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-21 00:29 +0000
                Re: Shutdown - 25 Years Later "Carlos E.R." <robin_listas@es.invalid> - 2025-04-22 10:35 +0200
                Re: Shutdown - 25 Years Later The Natural Philosopher <tnp@invalid.invalid> - 2025-04-22 10:03 +0100
                Re: Shutdown - 25 Years Later "Carlos E.R." <robin_listas@es.invalid> - 2025-04-22 11:27 +0200
                Re: Shutdown - 25 Years Later Pancho <Pancho.Jones@protonmail.com> - 2025-04-22 10:37 +0100
                Re: Shutdown - 25 Years Later The Natural Philosopher <tnp@invalid.invalid> - 2025-04-22 12:13 +0100
                Re: Shutdown - 25 Years Later Pancho <Pancho.Jones@protonmail.com> - 2025-04-22 12:38 +0100
                Re: Shutdown - 25 Years Later The Natural Philosopher <tnp@invalid.invalid> - 2025-04-22 14:29 +0100
                Re: Shutdown - 25 Years Later Pancho <Pancho.Jones@protonmail.com> - 2025-04-23 12:55 +0100
                Re: Shutdown - 25 Years Later Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-22 22:49 +0000
                Re: Shutdown - 25 Years Later candycanearter07 <candycanearter07@candycanearter07.nomail.afraid> - 2025-04-23 19:20 +0000
                Re: Shutdown - 25 Years Later Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-24 00:24 +0000
                Re: Shutdown - 25 Years Later candycanearter07 <candycanearter07@candycanearter07.nomail.afraid> - 2025-04-25 17:50 +0000
                Re: Shutdown - 25 Years Later Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-25 23:15 +0000
                Re: Shutdown - 25 Years Later John Ames <commodorejohn@gmail.com> - 2025-04-28 07:45 -0700
                Re: Shutdown - 25 Years Later Richard Kettlewell <invalid@invalid.invalid> - 2025-04-28 20:18 +0100
                Re: Shutdown - 25 Years Later The Natural Philosopher <tnp@invalid.invalid> - 2025-04-29 12:15 +0100
                Re: Shutdown - 25 Years Later Richard Kettlewell <invalid@invalid.invalid> - 2025-04-29 18:29 +0100
                Re: Shutdown - 25 Years Later The Natural Philosopher <tnp@invalid.invalid> - 2025-04-29 21:18 +0100
                Re: Shutdown - 25 Years Later Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-29 03:02 +0000
                Re: Shutdown - 25 Years Later Richard Kettlewell <invalid@invalid.invalid> - 2025-04-22 18:20 +0100
                Re: Shutdown - 25 Years Later Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-22 22:45 +0000
                Re: Shutdown - 25 Years Later Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-22 22:46 +0000
                Re: Shutdown - 25 Years Later The Natural Philosopher <tnp@invalid.invalid> - 2025-04-23 06:29 +0100
                Re: Shutdown - 25 Years Later Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-22 22:46 +0000
                Re: Shutdown - 25 Years Later Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-22 22:43 +0000
                Re: Shutdown - 25 Years Later "Carlos E.R." <robin_listas@es.invalid> - 2025-04-23 13:35 +0200
                Re: Shutdown - 25 Years Later Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-24 00:23 +0000
                Re: Shutdown - 25 Years Later "Carlos E.R." <robin_listas@es.invalid> - 2025-04-25 23:20 +0200
                Re: Shutdown - 25 Years Later Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-25 23:14 +0000
                Re: Shutdown - 25 Years Later The Natural Philosopher <tnp@invalid.invalid> - 2025-04-26 10:32 +0100
                Re: Shutdown - 25 Years Later Richard Kettlewell <invalid@invalid.invalid> - 2025-04-26 17:08 +0100
                Re: Shutdown - 25 Years Later Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-26 22:56 +0000
                Re: Shutdown - 25 Years Later Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-26 22:52 +0000
      Re: Shutdown - 25 Years Later The Natural Philosopher <tnp@invalid.invalid> - 2025-04-18 10:15 +0100
        Re: Shutdown - 25 Years Later Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-19 00:06 +0000
  Re: Shutdown - 25 Years Later vallor <vallor@cultnix.org> - 2025-04-18 10:41 +0000
    Re: Shutdown - 25 Years Later % <pursent100@gmail.com> - 2025-04-18 06:17 -0700
    Re: Shutdown - 25 Years Later "Carlos E.R." <robin_listas@es.invalid> - 2025-04-18 15:29 +0200
  Re: Shutdown - 25 Years Later Farley Flud <ff@linux.rocks> - 2025-04-18 19:02 +0000

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