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Groups > comp.os.linux.misc > #93263

Re: Linux offers choice, BSD offers fragmentation

From Lawrence D’Oliveiro <ldo@nz.invalid>
Newsgroups comp.os.linux.misc
Subject Re: Linux offers choice, BSD offers fragmentation
Date 2026-10-09 21:20 +0000
Organization A noiseless patient Spider
Message-ID <11ablr9$15ru5$3@dont-email.me> (permalink)
References (8 earlier) <119vn39$mtek$13@dont-email.me> <nii4iaFhu1lU1@mid.individual.net> <11a0r44$179lq$3@dont-email.me> <nipnemFmrjqU1@mid.individual.net> <nisr6hF6jjnU2@mid.individual.net>

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On Fri, 9 Oct 2026 20:47:45 +0200, Carlos E. R. spouted more AI slop:

> I asked chatgpt (as a glorified documentation search engine):

A search engine gives references.

> Some SSDs have a dedicated DRAM chip, typically hundreds of
> megabytes to several gigabytes in larger drives. It is volatile
> memory, just like your computer's RAM.
>
> It is primarily used to store the SSD's internal mapping tables,
> which translate logical block addresses into physical NAND flash
> locations.

This is what an OS filesystem cache does, too. So now you’re going
through *two* layers between the application and its data: the OS
filesystem implementation itself, plus an additional filesystem-like
layer within the drive. All that is extra overhead.

> One final distinction: a write cache can improve write speed by
> temporarily accepting data before it is fully committed to NAND.
> That is a separate issue from the read behavior discussed here.

Also one that doesn’t actually work, unless your OS filesystem cache
is useless.

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Thread

Linux needs less fragmentation Lars Poulsen <lars@beagle-ears.com> - 2026-10-04 14:08 -0700
  Re: Linux needs less fragmentation Michael Logies <logies@t-online.de> - 2026-10-04 23:33 +0200
    Re: Linux needs less fragmentation The Natural Philosopher <tnp@invalid.invalid> - 2026-10-05 09:20 +0100
  Re: Linux needs less fragmentation Leroy H <lh@somewhere.net> - 2026-10-04 21:44 +0000
  Re: Linux needs less fragmentation rbowman <bowman@montana.com> - 2026-10-05 01:53 +0000
    Re: Linux needs less fragmentation c186282 <c186282@nnada.net> - 2026-10-05 03:14 -0400
      Re: Linux needs less fragmentation The Natural Philosopher <tnp@invalid.invalid> - 2026-10-05 09:28 +0100
        Re: Linux needs less fragmentation "Carlos E. R." <robin_listas@es.invalid> - 2026-10-05 19:20 +0200
          Re: Linux needs less fragmentation The Natural Philosopher <tnp@invalid.invalid> - 2026-10-05 19:43 +0100
            Re: Linux needs less fragmentation Andy Burns <usenet@andyburns.uk> - 2026-10-08 15:25 +0100
              Re: Linux needs less fragmentation The Natural Philosopher <tnp@invalid.invalid> - 2026-10-08 15:29 +0100
              Re: Linux offers choice, BSD offers fragmentation Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-10-08 20:59 +0000
              Re: Linux needs less fragmentation c186282 <c186282@nnada.net> - 2026-10-09 02:42 -0400
              Re: Linux needs less fragmentation "Carlos E. R." <robin_listas@es.invalid> - 2026-10-09 20:47 +0200
                Re: Linux offers choice, BSD offers fragmentation Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-10-09 21:20 +0000
                Re: Linux offers choice, BSD offers fragmentation "Carlos E. R." <robin_listas@es.invalid> - 2026-10-09 23:27 +0200
                Re: Linux offers choice, BSD offers fragmentation c186282 <c186282@nnada.net> - 2026-10-10 04:01 -0400
                Re: Linux offers choice, BSD offers fragmentation c186282 <c186282@nnada.net> - 2026-10-11 04:31 -0400
        Re: Linux needs less fragmentation Rich <rich@example.invalid> - 2026-10-05 18:57 +0000
          Re: Linux needs less fragmentation The Natural Philosopher <tnp@invalid.invalid> - 2026-10-05 20:08 +0100
            Re: Linux needs less fragmentation Rich <rich@example.invalid> - 2026-10-05 20:18 +0000
              Re: Linux needs less fragmentation Richard Kettlewell <invalid@invalid.invalid> - 2026-10-06 08:34 +0100
                Re: Linux needs less fragmentation The Natural Philosopher <tnp@invalid.invalid> - 2026-10-06 11:17 +0100
                Re: Linux needs less fragmentation c186282 <c186282@nnada.net> - 2026-10-06 23:59 -0400
                Re: Linux needs less fragmentation rbowman <bowman@montana.com> - 2026-10-06 14:39 +0000
                Re: Linux needs less fragmentation Chris Ahlstrom <OFeem1987@teleworm.us> - 2026-10-06 13:50 -0400
    Re: Linux needs less fragmentation The Natural Philosopher <tnp@invalid.invalid> - 2026-10-05 09:25 +0100
      Re: Linux needs less fragmentation rbowman <bowman@montana.com> - 2026-10-05 19:36 +0000
        Re: Linux needs less fragmentation "Carlos E. R." <robin_listas@es.invalid> - 2026-10-05 21:49 +0200
          Re: Linux needs less fragmentation rbowman <bowman@montana.com> - 2026-10-06 02:35 +0000
          Re: Linux needs less fragmentation Philippe <p.naudin+nntp@free.fr> - 2026-10-06 08:13 +0200
            Re: Linux needs less fragmentation "Carlos E. R." <robin_listas@es.invalid> - 2026-10-06 11:12 +0200
              Re: Linux needs less fragmentation rbowman <bowman@montana.com> - 2026-10-06 14:48 +0000
  Re: Linux needs less fragmentation The Natural Philosopher <tnp@invalid.invalid> - 2026-10-05 09:19 +0100

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