HelenOS sources

SATA_DEFAULT_SECTOR_SIZE  501 uspace/drv/block/ahci/ahci.c 		sata->block_size = SATA_DEFAULT_SECTOR_SIZE;
SATA_DEFAULT_SECTOR_SIZE  504 uspace/drv/block/ahci/ahci.c 		sata->block_size = SATA_DEFAULT_SECTOR_SIZE;
HelenOS homepage, sources at GitHub