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From: =?UTF-8?Q?Bj=C3=B6rn_Lundin?= <bnl@nowhere.com>
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Move bookworm system from SSD to NVME
Date: Sat, 3 Aug 2024 13:54:33 +0200
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On 2024-08-03 03:27, Lawrence D'Oliveiro wrote:
> On Fri, 2 Aug 2024 15:12:57 +0100, The Natural Philosopher wrote:
> 
>> SSDS/NVM have their own internal  caching.
> 
> True for all drives, unfortunately.
> 
> It’s bloody stupid, because the drive caching is on the wrong side of the
> drive interface. Better to leave it to the OS, which can use main RAM for
> its filesystem caching, on the fast side of that drive interface.
> 
> When a drive says to the OS driver “write is done”, it should mean “write
> has gone to actual persistent storage”, not “write is in my cache”.


I think they cause grief in the postgres mail lists some 15-20 years ago.
They were called 'lying IDE-disks' and were not popular in that crowd.


-- 
/Björn