From: Frank Steinmetzger <Warp_7@gmx.de>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] Re: problem formatting new 256 GB USB stick : alternatives
Date: Wed, 19 Feb 2025 13:16:30 +0100 [thread overview]
Message-ID: <Z7XLngy0AsyZXEMs@tp> (raw)
In-Reply-To: <2240299.Icojqenx9y@rogueboard>
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Am Tue, Feb 18, 2025 at 11:25:28PM +0000 schrieb Michael:
> > TLC (tri-level cells)
> >
> > Hey, what if we do 8 different charge levels! Now you get 4 bits per
> > cell. Even harder to do, even less reliable...
> >
> >
> > QLC (quad-level cells)
> >
> > [I think you see where this is going]
>
> Yep, SLC > MLC > TLC > QLC in terms of performance, reliability, longevity and
> price. The phenomenal decrease in price per GB/TB over time is just that.
> Phenomenal. For reasons Grant explained it comes with measured reduction in
> reliability and longevity.
> Since they come with fast(er) DRAM cache which to
> some extent masks the underlying NAND performance, with other things being
> equal it makes sense to choose one with faster/larger DRAM.
Small correction: the DRAM is not for fast write performance. That is what
SLC cache is for: a small(ish) part of the TLC or QLC flash is used in SLC
mode, so the SSD can ingest data faster. In time of idleness, the SSD
controller starts “swapping out” the content of the SLC cache into its slow
TLC/QLC storage.
The DRAM’s single purpose is to hold the flash translation layer, i.e. the
mapping of logical storage area to physical flash cell. Otherwise it would
have to constantly be written during operation, which will make such
operation slower, epecially when dealing with many small files.
--
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next prev parent reply other threads:[~2025-02-19 12:18 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-15 7:41 [gentoo-user] problem formatting new 256 GB USB stick Philip Webb
2025-02-15 11:50 ` [gentoo-user] " Nuno Silva
2025-02-15 13:31 ` Michael
2025-02-16 2:37 ` Philip Webb
2025-02-16 9:08 ` Nuno Silva
2025-02-16 13:41 ` Michael
2025-02-16 14:48 ` Wols Lists
2025-02-17 23:12 ` Frank Steinmetzger
2025-02-18 11:53 ` Michael
2025-02-19 12:10 ` Frank Steinmetzger
2025-02-20 9:58 ` Michael
2025-02-16 22:57 ` [gentoo-user] problem formatting new 256 GB USB stick : more info Philip Webb
2025-02-17 0:17 ` [gentoo-user] " Nuno Silva
2025-02-17 0:39 ` [gentoo-user] " Michael
2025-02-17 3:43 ` Philip Webb
2025-02-17 9:18 ` Philip Webb
2025-02-17 12:02 ` Michael
2025-02-17 16:33 ` Stroller
2025-02-17 16:19 ` Wols Lists
2025-02-17 17:16 ` [gentoo-user] " Grant Edwards
2025-02-17 18:12 ` Michael
2025-02-18 3:46 ` [gentoo-user] Re: problem formatting new 256 GB USB stick : f3 Philip Webb
2025-02-18 4:43 ` Grant Edwards
2025-02-18 5:53 ` Philip Webb
2025-02-18 9:13 ` Frank Steinmetzger
2025-02-18 19:10 ` [gentoo-user] Re: problem formatting new 256 GB USB stick : alternatives Philip Webb
2025-02-18 21:18 ` Grant Edwards
2025-02-18 23:25 ` Michael
2025-02-19 12:16 ` Frank Steinmetzger [this message]
2025-02-19 12:20 ` Frank Steinmetzger
2025-02-20 10:47 ` Michael
2025-02-18 14:40 ` [gentoo-user] Re: problem formatting new 256 GB USB stick : f3 Grant Edwards
2025-02-18 17:00 ` Grant Edwards
2025-02-18 11:57 ` Michael
2025-02-18 18:54 ` [gentoo-user] Re: problem formatting new 256 GB USB stick : glances at gparted Philip Webb
2025-02-18 23:13 ` Michael
2025-02-19 0:47 ` Grant Edwards
2025-02-19 1:12 ` [gentoo-user] alternatives to USB sticks for reliable archiving Philip Webb
2025-02-19 2:28 ` [gentoo-user] " Grant Edwards
2025-02-19 9:48 ` [gentoo-user] " Michael
2025-02-19 3:00 ` [gentoo-user] Re: problem formatting new 256 GB USB stick : glances at gparted eric
2025-02-20 18:18 ` Dale
2025-02-20 22:40 ` Frank Steinmetzger
2025-02-20 23:43 ` Grant Edwards
2025-02-21 8:10 ` Dale
2025-03-08 22:09 ` Frank Steinmetzger
2025-03-08 22:48 ` Dale
2025-03-09 10:31 ` Michael
2025-03-10 3:32 ` Dale
2025-03-10 13:01 ` Frank Steinmetzger
2025-02-17 16:38 ` [gentoo-user] problem formatting new 256 GB USB stick Stroller
2025-02-17 23:06 ` Frank Steinmetzger
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