Hi All,

I was reading through the text, "The Design of the Unix Operating System" - Maurice Bach

While reading through the Buffer cache, I had the following query

Buffer data structure, has Buffer header + pointer to data area + pointers for Buffer Management.

Does this,"pointer to data area", corresponds to disk block or Logical Filesystem block ?

I am confused about this. 

To add more, I am aware of the fact that disk block is of 512 bytes on the most of the hard disks and

logical disk block size ( depending on filesystem ) is of 4k in size.

what would be available in data area pointed in buffer ?

Thanks,

Satheesaran