* disk/ata.c (grub_ata_readwrite): Call grub_ata_pio_read and grub_ata_pio_write once for every single sector, instead of for multiple sectors.
* disk/ata.c (grub_ata_readwrite): Call grub_ata_pio_read and grub_ata_pio_write once for every single sector, instead of for multiple sectors.