Re: ext3 fs: no userspace writes == no disk writes ?

[Padraig Brady]

Padraig Brady wrote:
> Rob van Nieuwkerk wrote:
> 
>> Hi Pádraig,
>>
>> Pádraig Brady wrote:
>>
>>> Rob van Nieuwkerk wrote:
>>>
>>>> Hi Alan,
>>>>
>>>>
>>>>> On Fri, 2002-09-20 at 00:04, Andrew Morton wrote:
>>>>>
>>>>>
>>>>>> There are frequently written areas of an ext3 filesystem - the
>>>>>> journal, the superblock.  Those would wear out pretty quickly.
>>>>>
>>>>>
>>>>> CF is -supposed- to wear level.
>>>>
>>>>
>>>> Yes I know.
>>>>
>>>> But I haven't been able to find any specs from any CF manufacturer
>>>> about this mechanism, percentage of spare sectors or number of allowed
>>>> write-cycles in general.
>>>
>>>
>>> me either.
>>>
>>> Why don't you just mount the fs ro ?
>>>
>>> Pádraig
>>
>>
>>
>> Ehm .., because I need to store data on it ..
> 
> 
> Ehm, well remount,rw before you store data on it
> and remount,ro when finished?

Note you can organise things (links from /etc/various /dev/various /var
to ramdisk/tmpfs/...) so that you never have to mount the CF rw.

Pádraig.