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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


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.

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