Re: impact of 4k sector size on the IO & FS stack

Alan Cox wrote:

I would be interested to know what the disk vendors intend to use as
their strategy when (with ATA) they have a 512 byte write from an older
file system/setup into a 4K block. The case where errors magically appear

Well, you have logical and physical sector size changes.

First generation of 1K sector drives will continue to use the same 
512-byte ATA sector size you are familiar with.  A single 512-byte write 
will cause the drive to perform a read-modify-write cycle.  This 
configuration is physical 1K sector, logical 512b sector.

A future configuration will change the logical ATA interface away from 
512-byte sectors to 1K or 4K.  Here, it is impossible to read a quantity 
smaller than 1K or 4K, whatever the sector size is.

	Jeff