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WD(4)                     NetBSD Programmer's Manual                     WD(4)


NAME

     wd - WD100x compatible hard disk driver


SYNOPSIS

     wd* at wdc? channel ? drive ? flags 0x0000
     wd* at pciide? channel ? drive ? flags 0x0000


DESCRIPTION

     The wd driver supports hard disk which emulate the Western Digital
     WD100x.  This includes standard MFM, RLL, ESDI, IDE and EIDE drives.

     The flags are used only with controllers with mode settings support (like
     some PCIIDE controllers). The first 4 bytes of the flags define the PIO
     mode to use, the second DMA mode and the third UltraDMA mode. For each
     group of 4 bytes, the 3 lower define the mode to use, and the last one
     must be 1 for the setting to be used. For DMA and UDMA, 0xf means 'dis-
     able'. For example, 0x0fac means 'use PIO mode 4 DMA mode 2, disable Ul-
     traDMA'. 0x0000 means "use whatever the drive claims to support.


SEE ALSO

     intro(4) wdc(4) pciide(4) scsi(4)

NetBSD 1.4                     October 15, 1998                              1