I was trying to put gentoo on a dell poweredge 1950 quadcore xeon machine with three disks connected to a lsi PERC 5/i raid controller. In the BIOS settings, all three disks were added to the controller for a RAID5 set up. When I boot from LiveCD (2008 version with 2.6.24-r5 kernel) with dmraid='-ay' option, it came up not recognizing the RAID set, as I only saw "control" under /dev/mapper. modprobe megaraid was okay, so was modprobe raid5. Under /dev, I only saw sda, but there was no sdb, sdc. So it looked like there was only one disk but the system did not recognize it as a raid set. Booting from LiveCD with dmraid='-ay' doscsi didn't help. I got the same result. If I did a dmraid -ay in bash, I got "No RAID disks". Could anyone point me to some instructions on how to make Gentoo recognize the PERC 5/i RAID controller?
I tried both 32bit and 64bit gentoo and results were the same. lspci showed: 02:0e.0 RAID bus controller: Dell PowerEdge Expandable RAID controller 5 dmesg showed: megaraid cmm: 2.20.2.7 (Release Date: Sun Jul 16 00:01:03 EST 2006) megaraid: 2.20.5.1 (Release Date: Thu Nov 16 15:32:35 EST 2006) megasas: 00.00.03.10-rc5 Thu May 17 10:09:32 PDT 2007 megasas: 0x1028:0x0015:0x1028:0x1f03: bus 2:slot 14:func 0 ACPI: PCI Interrupt 0000:02:0e.0[A] -> GSI 78 (level, low) -> IRQ 17 megasas: FW now in Ready state scsi4 : LSI Logic SAS based MegaRAID driver scsi 4:0:0:0: Direct-Access SEAGATE ST973402SS S206 PQ: 0 ANSI: 5 scsi 4:0:1:0: Direct-Access SEAGATE ST973402SS S206 PQ: 0 ANSI: 5 scsi 4:0:2:0: Direct-Access SEAGATE ST973402SS S206 PQ: 0 ANSI: 5 QLogic Fibre Channel HBA Driver scsi 4:0:8:0: Enclosure DP BACKPLANE 1.05 PQ: 0 ANSI: 5 scsi 4:2:0:0: Direct-Access DELL PERC 5/i 1.03 PQ: 0 ANSI: 5 scsi 4:0:8:0: Attached scsi generic sg1 type 13 sd 4:2:0:0: [sda] 284164096 512-byte hardware sectors (145492 MB) sd 4:2:0:0: [sda] Write Protect is off sd 4:2:0:0: [sda] Mode Sense: 1f 00 10 08 sd 4:2:0:0: [sda] Write cache: disabled, read cache: disabled, supports DPO and FUA sd 4:2:0:0: [sda] 284164096 512-byte hardware sectors (145492 MB) sd 4:2:0:0: [sda] Write Protect is off sd 4:2:0:0: [sda] Mode Sense: 1f 00 10 08 Thanks very much for your help! -- -hoki
