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How come FreeBSD does not detect my HP Netservers SCSI controller?

April 26, 2017controller detect FreeBSD HP netserver SCSI

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How come FreeBSD does not detect my HP Netservers SCSI controller?

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This is basically a known problem. The EISA on-board SCSI controller in the HP Netserver machines occupies EISA slot number 11, so all the “true” EISA slots are in front of it. Alas, the address space for EISA slots >= 10 collides with the address space assigned to PCI, and FreeBSD’s auto-configuration currently cannot handle this situation very well. So now, the best you can do is to pretend there is no address range clash :), by bumping the kernel option EISA_SLOTS to a value of 12. Configure and compile a kernel, as described in the Handbook entry on configuring the kernel. Of course, this does present you with a chicken-and-egg problem when installing on such a machine. In order to work around this problem, a special hack is available inside UserConfig. Do not use the “visual” interface, but the plain command-line interface there.