Kernel Configuration - Part XVI

Yesterday, we took the high level view of IDE and ATAPI interfaces in the kernel

configuration series. We noted that both have contributed to the proliferation
of affordable high capacity storage in modern computers. We also mentioned SCSI
- the Small Computer System Interface. Today, we’ll talk about SCSI in more
detail, focusing on the kernel configuration option.

The SCSI interface is intended for fast data transfer. Because of the physical
architecture of the SCSI interface, data transfer rates are far above those of
IDE and ATAPI - up to 80 megabytes per second. Unlike IDE and ATAPI, the SCSI
controller is separate from the storage hardware - usually in the form of a card

inserted into an expansion slot. Further, the SCSI interface will accept
connections from several devices. Consequently, it more closely resembles an I/O

bus.

If you’re using SCSI hard drives or CD-ROM drives, you’ll want to enable the
SCSI option in the kernel configuration. As always, it’s crucial to know the
hardware in your machine prior to building the new kernel source. However, given

that SCSI drives really are the Cadillac of storage devices, it’s unlikely that
you’d have them and not know. The kernel configuration allows for specific SCSI
controlled devices, including hard drives, tape drives and CD-ROMs. Select your
devices from the configuration screens and, where necessary, the low-level
drivers.

Tomorrow, it’s on to Fusion MPT support.