hardware sector size's over 8K current report an Error but are passed through resulting in lots of disk waste

Hardware sector size's over 8K current report an Error but are passed through resulting in lots of disk waste.
Hard disks are either 512 byte or 4K byte sectors. However solaris lies about the side of the hardware
sector (128k). We should just use 8K in that case as Solaris with O_DIRECT will ultimately have to map
this to hard disk sectors which will be either 512 or 4K.