> > root@argo-cd root # modprobe pdcraid > > /lib/modules/2.4.21-p3/kernel/drivers/ide/raid/pdcraid.o: init_module: No > > such device > > Hint: insmod errors can be caused by incorrect module parameters, > > including invalid IO or IRQ parameters > > /lib/modules/2.4.21-p3/kernel/drivers/ide/raid/pdcraid.o: insmod > > /lib/modules/2.4.21-p3/kernel/drivers/ide/raid/pdcraid.o failed > > /lib/modules/2.4.21-p3/kernel/drivers/ide/raid/pdcraid.o: insmod pdcraid > > failed > > > > I don't really understand when I need ataraid/pdraid. Should I need them > > if > > I want to use md-tools linux RAID1 or (as I suspect) I only need it if I > > want to use hardware raid? > > > I dicovered that I just needed to compile pdc202xx_new *into* the kernel. After compiling it into te kernel I could see all disks *and* modprobe pdcraid just worked flawlessly. And YES: devfs support is there so I could see all devices even /dev/ataraid/disc0/disc > #1)The promise controller doesn't do hardware raid. All raid occurs in > the driver. The only hardware support is some bios code that allows you > to boot off a raid 0 array. So under linux all the (raid) job is accomplished by pdcraid/ataraid? > #2)You don't want any promise raid configured for linux md raid. you mean I will not use a raid1 array defined into promise as base for md. If this is what you mean I perfectly agree/undertsand or you mean it wouldn't be reasonable to use (partitions from) single disks (hdg, hde) to create an array w/ md-tools? > #3)Linux software raid is better than promise's raid driver. here you are comparing "Linux software raid" = pdcraid with "promise's raid" = ft.o precompiled? FINAL just to be sure, (i'm not always that *slow* ;-) since everything seems to work (I already made a trial installation on /dev/ataraid/disc0), is that a suggested way to use this controller? Linux doesn't seem to see a lot of difference between BIOS setting ATA or RAID. It sees the array even if I set it to ATA. Should I leave to RAID? Very last thing: when using md-raid, i try to put disks on different controllers. Should I take such a care width pdc20276 too? thanks for you time sandro *:-) -- Sandro Dentella *:-) e-mail: sandro.dentella@xxxxxx http://www.tksql.org TkSQL Home page - My GPL work
