On Fri, Jun 06 2008, Alan Cox wrote: > On Fri, 6 Jun 2008 09:54:33 +0200 > Jens Axboe <jens.axboe@xxxxxxxxxx> wrote: > > > On Thu, Jun 05 2008, Anil kumar wrote: > > > Hi, > > > > > > Can I call blk_queue_hardsect_size in a driver and set it to 520-byte > > > as hardware sector size. How does the kernel and block layers take > > > the request, will it be in multiples of 520-bytes aligned or 512 bytes > > > aligned? > > > > No, Linux only supports power-of-2 hardware block sizes I'm afraid. > > And only some of those - which is why we can't support CP/M disks and > also early smartmedia stuff (128/256 byte/sector) Right, should've made that clearer - Linux only really supports power-of-2 hw block sizes, where the size is >= 512 and <= PAGE_CACHE_SIZE. -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
