Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: Rich <rich@example.invalid>
Newsgroups: comp.os.linux.misc
Subject: Re: News : ARM Trying to Buy AmperComputing
Date: Wed, 22 Jan 2025 20:11:05 -0000 (UTC)
Organization: A noiseless patient Spider
Lines: 34
Message-ID: <vmrjcp$16674$2@dont-email.me>
References: <_hycnQxlN5kAphr6nZ2dnZfqn_SdnZ2d@earthlink.com>   <35e42921-5781-8728-236f-afad1d3b56b1@example.net> <vSydnd3xKfdNFhD6nZ2dnZfqn_udnZ2d@earthlink.com> <7258fd01-44f7-850d-3f69-54b93489f64d@example.net> <vml7e7$31s95$1@dont-email.me> <69ce04cf-80a7-7170-675f-4165ffedc92b@example.net> <RtudnVi93qkPcBP6nZ2dnZfqnPudnZ2d@earthlink.com> <4985abd5-ec8c-44da-0105-0778434959c0@example.net> <vmou5k$bc8h$1@dont-email.me> <vmq7sv$rr50$3@dont-email.me> <7b204573-ffba-79cc-e153-1dde4a00f2ad@example.net>
Injection-Date: Wed, 22 Jan 2025 21:11:05 +0100 (CET)
Injection-Info: dont-email.me; posting-host="7156a9017a99f4f9fe50d6dcf55d1900";
	logging-data="1251556"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX18+GM5NMThUuRyqxpu+/gu/"
User-Agent: tin/2.6.1-20211226 ("Convalmore") (Linux/5.15.139 (x86_64))
Cancel-Lock: sha1:qp9UyIZMhr1UDq4/gF+B9iA4xR8=

D <nospam@example.net> wrote:
> 
> 
> On Wed, 22 Jan 2025, The Natural Philosopher wrote:
> 
>> On 21/01/2025 19:56, Rich wrote:
>>> For SSD's, writes occur to an "erased" flash block (typically much
>>> larger than a "disk sector" size used by the host) and given enough
>>> writes over a short enough timeframe the SSD controller can run out of
>>> "pre-erased" blocks to use, and when that happens write speed slows
>>> down to the rate that can be done when a "block erase" has to occur
>>> before the actual writes can hit the media.  Note that this "block
>>> erase" can also invove moving any partially used data sectors out of
>>> the block into another block, creating a "write amplification"
>>> situation as well.
>>
>> One of the best ways to gain speed and longevity is to buy an SSD that is way 
>> larger than you need. So it always has empty blocks available.
>>
>> And can do the block erases in background
> 
> Indutrial ssds do have spare space exactly in order to prolong lifetime.

Even consumer SSD's have "spare space", for the same reason.  They 
just, typically, don't have as much spare space as the "server class" 
drives do from the start.

> I think when ssds first came out, there was one vendor, STEC, if 
> memory serves, that manufactured vastly over engineered drives in the 
> beginning.  They seemed to last forever.  Then they learned of 
> course, and started to reduce quality and lifetime to industry 
> standards and of course the price as well.

Yes, the race to the bottom on price.