IBM Systems Group
AIX-AK FZK 2005 © 2005 IBM Corporation
Design SD
disks
block device
(sd_mod.o)
User Space
Kernel Space
SG
pass-through
char device
(sg.o)
ST
tapes
char device
(st.o)
SR
cdrom/dvd
block device
(sr_mod.o)
SCSI unifying layer
(scsi_mod.o, scsi*.[hc], hosts.[hc], constants.c)
SCSI / FC Host Bus
Adapter drivers
(e.g. qla2300.o)
Pseudo drivers for
non SCSI buses
(e.g. ide-scsi.o)
upper level
lower level
mid level
SCSI / FC
disks
SCSI / FC
disks
SCSI / FC
disks
Parallel SCSI / SAN SCSI / FC
tape
IBMTape
char device
(IBMtape.o)