Re: Why SCSI module needed for PCI-IDE ATA only disks ?

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Ed Sweetman wrote:
Jeff Garzik wrote:
Bernard Pidoux wrote:
I am asking why need to compile the following modules while I do not
have any SCSI device ?

libata uses SCSI to provide a lot of infrastructure that it would otherwise have to recreate. Also, using SCSI meant that it automatically worked in existing installers.

    Jeff

This confusion could easily be remedied by explaining the requirement in the Help output for libata drivers/section. Also, making a dependency in the menu (since there is one) or automatically selecting the required scsi items when you select a libata driver would seem logical. As it is, nothing is said of scsi requirements in menuconfig. Trying to boot a machine without compiling the scsi drivers (something you're allowed to do) results in a system that boots and initializes the ata busses but can't communicate to any of the drives on them, (useless).

You can't select libata drivers without the SCSI core. However, you can select libata drivers without the SCSI disk (sd) or the SCSI CD (sr) drivers. However, that's a legitimate configuration as you may have only hard disks, only CD drives, etc. and there would be no need to build the other module. This isn't a major problem for most standard configurations as those drivers are needed to handle things like USB and FireWire flash drives, external HDs/optical drives, etc. anyway.

--
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from [email protected]
Home Page: http://www.roberthancock.com/

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