Re: set blksize of block device

[Denis Vlasenko]

> >> I am learning block device drivers and have a newbie question. Given 
> >> a block device, is there anyway that I could set its block size? For 
> >> example, I want to write a block device driver that will work on an 
> >> existing block device.  In this driver, I want block size smaller. 
> >> (The idea looks confusing but I could explain if anybody is 
> >> interested :- )  However,  typically the block size is 1KB, now I 
> >> want to set it to 512 or 256.  Can I do it?

256 - no way if hardware can do only 512-byte writes.

You need read-modify-write for this.
--
vda

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