Tomas Larsson wrote:
>> -----Original Message-----
>> From: piclist-bounces@mit.edu 
>> [mailto:piclist-bounces@mit.edu] On Behalf Of Hector Martin
>> Sent: Friday, July 13, 2007 3:16 AM
>> To: Microcontroller discussion list - Public.
>> Subject: Re: [EE]:: SATA transfer rate
>>
>> Tomas Larsson wrote:
>>> I think you got it a little bit wrong.
>>> The delayed write / write cache is actually residing on the disk 
>>> itself, the OS can't do very much about it.
>> While hard drives do have write caches, so does the OS. In 
>> this case it's the OS's cache we're talking about. I'm also 
>> pretty sure many flash drives have next to no cache, unlike 
>> real platter-based hard drives.
> 
> The cache setting in the device manager is for switching the hard-drive
> write-cache on or of, not the OS.
> Don't think I ever seen a settings for the OS disk-buffers for others than
> flash -drives.
> As far as I know, the OS do not maintain any configurable buffers for
> hard-drives, only for memory-cards an similar.

This may be while Windows is so slow then. Linux tends to use up all 
available RAM in disk buffers (without locking it, of course - if you 
need the RAM it gets freed, it's just a way of doing something 
productive with it instead of just letting it sit around)

400MB worth of buffers in RAM on my system, currently.


-- 
Hector Martin (hector@marcansoft.com)
Public Key: http://www.marcansoft.com/marcan.asc

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