Re: set blksize of block device

[Lei Yang <lya755@xxxxxxxxxxxxxxxxxxxx>]

Jon Masters wrote:

> On Tue, 26 Oct 2004 23:24:59 -0500, Lei Yang
> <lya755@xxxxxxxxxxxxxxxxxxxx> wrote:
>
>  
>
> > However,  typically the block size is 1KB, now I want to set it to 512
> > or 256.  Can I do it?
> >    
>
> Linux supports variable hardware block sizes of up to PAGE_SIZE (4K on
> most 32bit systems but not always) and typical devices use 512 byte
> sectors in the case of disks, with larger mass storage devices such as
> optical drives using several KB. What is it that you actually want to
> do though - vary the physical block size used?
>
> Jon.
>
>
>  
I want to set the block size of ramdisk. However, I realized in rd.c, 
the hardsect is set to 512, thus the new block size cannot be less than 
512. If I change that in rd.c and recompile, can I safely say that I 
could set the block size to smaller value without causing dramatic 
performance degrade?

Thanks,
Lei


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