>>>>> On Sat, 20 Apr 2002, "Murty" == Murty Rompalli wrote: Murty> You have to offset the first IO number by 2 to get the second IO; because Murty> the first IO number is infact IO range of size 8 and the second IO number Murty> is a particular IO address. So you should use: Murty> boot linux ide2=0xa800,0xac02,9 ide3=0xb000,0xb402,9 Murty> Also,make sure /proc/interrupts confirms that you are using IRQ 9 for both Murty> ide2 and ide3; else use different IRQs above. Okay, I'm booting with: kernel /vmlinuz-2.4.9-31smp ro root=/dev/hda2 hdc=ide-scsi ide2=0xa800,0xac02,9 ide3=0xb000,0xb402,9 PDC20267: IDE controller on PCI bus 00 dev 50 PDC20267: chipset revision 2 PDC20267: not 100% native mode: will probe irqs later PDC20267: ROM enabled at 0xe3000000 PDC20267: (U)DMA Burst Bit ENABLED Primary MASTER Mode Secondary MASTER Mode. PDC20267: neither IDE port enabled (BIOS) hda: Maxtor 90845D4, ATA DISK drive hdb: Maxtor 91303D6, ATA DISK drive hdc: PLEXTOR CD-R PX-W8432T, ATAPI CD/DVD-ROM drive hde: IBM-DTLA-307060, ATA DISK drive ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 ide1 at 0x170-0x177,0x376 on irq 15 ide2 at 0xa800-0xa807,0xac02 on irq 9 blk: queue c03c0ba0, I/O limit 4095Mb (mask 0xffffffff) blk: queue c03c0ba0, I/O limit 4095Mb (mask 0xffffffff) hda: 16514064 sectors (8455 MB) w/256KiB Cache, CHS=1027/255/63, UDMA(33) blk: queue c03c0cdc, I/O limit 4095Mb (mask 0xffffffff) blk: queue c03c0cdc, I/O limit 4095Mb (mask 0xffffffff) hdb: 25450992 sectors (13031 MB) w/512KiB Cache, CHS=1584/255/63, UDMA(33) hde: 120103200 sectors (61493 MB) w/1916KiB Cache, CHS=119150/16/63 Partition check: hda: hda1 hda2 hdb: hdb1 hde: hde1 Floppy drive(s): fd0 is 1.44M FDC 0 is a post-1991 82077 md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27 md: Autodetecting RAID arrays. md: autorun ... md: ... autorun DONE. I'm able to mount my disk's partition (hde1) without using RAID, seemingly. Recall that Promise's driver was reporting: Promise FastTrak Series Linux Driver v1.20 (build 9) scsi3 : FASTTRAK Vendor: Promise Model: 1+0 Span Rev: 1.10 Type: Direct-Access ANSI SCSI revision: 02 Attached scsi disk sdb at scsi3, channel 0, id 0, lun 0 SCSI device sdb: 120103137 512-byte hdwr sectors (61493 MB) sdb: sdb1 I'm not sure about "Model: 1+0 Span" . . . can I just access this as a normal IDE device? Ataraid still hates it: [root@hewes darren]# insmod pdcraid Using /lib/modules/2.4.9-31smp/kernel/drivers/ide/pdcraid.o /lib/modules/2.4.9-31smp/kernel/drivers/ide/pdcraid.o: init_module: No such device Hint: insmod errors can be caused by incorrect module parameters, including invalid IO or IRQ parameters [root@hewes darren]# Thanks! I can see my data now, I just don't know if I dare write to it mounted at hde1?! -Darren