Conference mvblab::alphaserver_4100

507.0. "RAID Cntrl Configuration Problems" by NBOFS1::SCHALLER (BERNI) Mon Feb 24 1997 04:10

Hi all, 

thereis something going wrong with Raid-controllers in Alphaserver 4100.
Alphaserver     FW:  3.0
Raid Controller FW:  2.42 

Config with one KZPSC-XA 1 Channel Raid

Bus     Slot  	Controller      	Devices
PCI 1	5       empty
	4	KZPDA   		DKCnnn
	3	KZPSA           	DKBnnn
	2	empty

PCI 0	5	empty
	4	KZPSC-XA        	DRAn   	first Raid Controller
	3	FDDI
	2	VGA
	.
	1	internal CDROM RRD42	DKAnn
	0	Reserved

This config works well.
-----------------------------------
ADD ON second RAID Controller
                                  
Config with "Two" KZPSC-XA 1 Channel Raid

Bus     Slot  	Controller      	Devices
PCI 1	5       KZPSC-XA                DRAnn   second Raid Controller
	4	KZPDA   		DKCnnn
	3	KZPSA           	DKBnnn
	2	empty

PCI 0	5	empty
	4	KZPSC-XA        	DRDnn   first Raid Controller
	3	FDDI
	2	VGA
	.
	1	internal CDROM RRD42	DKAnn
	0	Reserved

This Config takes the DRAnn (re0..)devices to the second Raid Controller
and the new DRDnn (re8...) devices to the first Raid Controller. WHY??
This is absolut fatal because device naming doesn't match anymore.


Until now I thought in PCI 0 there should be DRAnn and
in PCI 1 there should then be DRBnn.

When running RCU Utility Version 3.3, it comes up with
	SWXCR #1	as first RAID Controller
	SWXCR #2	as second RAID COntroller
this is what I assumed to see. OK.

Why doesn't this sequence match when doeing a >>> SHO DEVICE  or 
when booting Digital Unix 4.0a.


Bye 
Berni



    

    Berni,
    
    I've made a correction in the bus placement of the internal SCSI
    controller in your configuration.  The CDROM controller is 
    actually on Bus 1.  The SRM console assigns devices starting on
    PCI bus 1.  Hopefully this will answer your question about the DRA
    devices seeming to move as a second controller is added.
    
    Regards,
    
    Dennis H.
    

Bus     Slot  	Controller      	Devices
PCI 1	5       empty
	4	KZPDA   		DKCnnn
	3	KZPSA           	DKBnnn
	2	empty
    	.
	1	internal CDROM RRD42	DKAnn
        0	MCBus to PCI Bridge
    
    
PCI 0	5	empty
	4	KZPSC-XA        	DRAn   	first Raid Controller
	3	FDDI
	2	VGA
	.
	1	PCI to EISA BUs Bridge
	0	MCBus to PCI Bridge

    

    FWIW, UNIX assigns sizes and names devices in the same order as the SRM
    console. We size PCI1 first to insure DKA will always be the embedded,
    NCR810-based CD/ROM. This was deemed important because Digital UNIX
    installation instructions tell the user to BOOT DKAXXX.
    
    BC