9.1. Disk driver (sd)
Two types of SCSI devices are accessible via the sd driver:
The sd driver is a block device which means that it is closely associated
with the block subsystem. It also supports the concept of partitions.
[
man sd dates from 1992.]
The sd driver is capable of recognizing 128 disks when it is loaded
at kernel boot time or later as a module. However, once it is loaded,
it will only recognize a fixed number of additional disks. The number
of additional disks that can be accommodated is set by the kernel
configuration parameter CONFIG_SD_EXTRA_DEVS whose default value is 40.
9.1.1. sd boot parameters
None.
9.1.2. sd module parameters
The sd driver takes no parameters when loaded as a module. Note that
its module name is sd_mod.o.