dmesg | grep sd
    deraadt@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation)
wsdisplay0: screen 1-5 added (std, vt100 emulation)
sd0 at scsibus1 targ 1 lun 0: <ATA, WDC WDS500G2B0A-, X611> SCSI3 0/direct fixed naa.5001b448b4d4432c
sd0: 476940MB, 512 bytes/sector, 976773168 sectors, thin
wskbd0 at pckbd0: console keyboard, using wsdisplay0
sd1 at scsibus2 targ 1 lun 0: <Generic-, SD/MMC, 1.00> SCSI2 0/direct removable
sd2 at scsibus2 targ 1 lun 1: <Generic-, SD/MMC/MS/MSPRO, 1.00> SCSI2 0/direct removable
sd3 at scsibus3 targ 1 lun 0: <WD, My Passport 0830, 1065> SCSI4 0/direct fixed
sd3: 476908MB, 512 bytes/sector, 976707584 sectors
sd4 at scsibus4 targ 1 lun 0: <WD, Elements 10B8, 1012> SCSI4 0/direct fixed serial.105810b8343638503839
sd4: 953837MB, 512 bytes/sector, 1953458176 sectors
wskbd1: connecting to wsdisplay0
root on sd3a (79ac9c4eb7104124.a) swap on sd3b dump on sd3b


fdisk sd0
Disk: sd0       Usable LBA: 34 to 976773134 [976773168 Sectors]
   #: type                                 [       start:         size ]
------------------------------------------------------------------------
   0: Win Recovery                         [        2048:       921600 ]
   1: EFI Sys                              [      923648:       204800 ]
   2: e3c9e316-0b5c-4db8-817d-f92df00215ae [     1128448:        32768 ]
   3: FAT12                                [     1161216:    975611904 ]

mount_msdos /dev/sd0d /mnt
mount_msdos: /dev/sd0d on /mnt: Device not configured
chikadee#