linux-kernel - Re: file system for solid state disks

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Message-ID: <Pine.LNX.4.61.0709050847020.11599@chaos.analogic.com>
Date:	Wed, 5 Sep 2007 08:56:20 -0400
From:	"linux-os \(Dick Johnson\)" <linux-os@...logic.com>
To:	"Denys Vlasenko" <vda.linux@...glemail.com>
Cc:	"Daniel J Blueman" <daniel.blueman@...il.com>,
	"Jan Engelhardt" <jengelh@...putergmbh.de>,
	"Richard Ballantyne" <richardballantyne@...il.com>,
	"Linux Kernel" <linux-kernel@...r.kernel.org>
Subject: Re: file system for solid state disks

On Wed, 5 Sep 2007, Denys Vlasenko wrote:

> On Thursday 23 August 2007 09:55, Daniel J Blueman wrote:
>> On 23 Aug, 07:00, Jan Engelhardt <jengelh@...putergmbh.de> wrote:
>>> On Aug 23 2007 01:01, Richard Ballantyne wrote:
>>>> What file system that is already in the linux kernel do people recommend
>>>> I use for my laptop that now contains a solid state disk?
>>>
>>> If I had to choose, the list of options seems to be:
>>>
>>> - logfs
>>>   [unmerged]
>>>
>>> - UBI layer with any fs you like
>>>   [just a guess]
>>>
>>> - UDF in Spared Flavor (mkudffs --media-type=cdrw --utf8)
>>>   [does not support ACLs/quotas]
>>
>> Isn't it that with modern rotational wear-levelling, re-writing hot
>> blocks many times is not an issue, as they are internally moved around
>> anyway? So, using a journalled filesystem such as ext3 is still good
>> (robustness and maturity in mind).
>
> Crap hardware (one which only _claim_ to do it) is out there,
> and is typically cheaper, so users preferentially buy that ;)
> --
> vda

You might want to check and see what is actually being
used for the solid-state disk. Some solid state disks
are SRAM and DRAM. SRAM is fast, it doesn't require refresh,
is now as cheap as flash, and does R/W forever. It retains
its data for 10 years of power being removed by using an
embedded battery.

http://en.wikipedia.org/wiki/Solid_state_drive

This is exactly what I proposed on this list a long
time ago. It is now a reality.

Cheers,
Dick Johnson
Penguin : Linux version 2.6.22.1 on an i686 machine (5588.30 BogoMips).
My book : http://www.AbominableFirebug.com/
_

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