# These options are used to tune the hard drives - # read the hdparm man page for more information # Set this to 1 to enable DMA. This might cause some # data corruption on certain chipset / hard drive # combinations. This is used with the "-d" option # USE_DMA=1 # Multiple sector I/O. a feature of most modern IDE hard drives, # permitting the transfer of multiple sectors per I/O interrupt, # rather than the usual one sector per interrupt. When this feature # is enabled, it typically reduces operating system overhead for disk # I/O by 30-50%. On many systems, it also provides increased data # throughput of anywhere from 5% to 50%. Some drives, however (most # notably the WD Caviar series), seem to run slower with multiple mode # enabled. Under rare circumstances, such failures can result in # massive filesystem corruption. USE WITH CAUTION AND BACKUP. # This is the sector count for multiple sector I/O - the "-m" option # # MULTIPLE_IO=16 # (E)IDE 32-bit I/O support (to interface card) # # EIDE_32BIT=3 # Enable drive read-lookahead # # LOOKAHEAD=1 # Add extra parameters here if wanted # On reasonably new hardware, you may want to try -X66, -X67 or -X68 # Other flags you might want to experiment with are -u1, -a and -m # See the hdparm manpage (man hdparm) for details and more options. # EXTRA_PARAMS=