Hi, I am trying to setup a RAID-1 setup for the boot/root partition. I got the setup working, except what I see with some of my tests leave me less convinced that it is actually working. My system is debian 3.1 and I am not using the raid-setup options in the debian-installer, I am trying to add raid-1 to an existing system (followed http://www.tldp.org/HOWTO/Software-RAID-HOWTO.html -- 7.4 method 2) I have /dev/hda (master on primary) and /dev/hdc (master on secondary) setup as mirrors. I also have a cdrom on /dev/hdd. Now if I disconnect hda and reboot, everything seems work - except what used to be /dev/hdc comes up as /dev/hda. I know this since I the bios does complain that "primary disk 0" is missing and I would have expected a missing hda, not a missing hdc. Anyways, the software seems to recognize the "failed-disk" fine if I connect the real hda back. Is this the way it is supposed to work? Can I rely on this? Also what happens when I move on to fancier setups like raid5?. My box is a dell 400sc with some phoenix bios (doesnt have many options either). I get different (still unexpected) results with the cdrom connected and not. Question #2 (probably related to my problem) My grub menu.lst is as follows (/dev/md0 is made of /dev/hda1 and /dev/hdc1) For testing, I made two entries (one for (hd0,0) and another for (hd1,0)). The howto I was reading wasn't clear to me. Should I be making just one entry pointing to /dev/md0? Also trying labels for "hda" and "hdc" after connecting the faulty drive back gave me different results ( in one case I was looking at "older" data and in the other case I wasn't) (ignore the vs2.1.xxx. it is a linux-vserver patch - shouldn't matter here) title Debian GNU/Linux, kernel 2.6.13.3-vs2.1.0-rc4-RAID-hda root (hd0,0) kernel /boot/vmlinuz-2.6.13.3-vs2.1.0-rc4 root=/dev/md0 ro initrd /boot/initrd.img-2.6.13.3-vs2.1.0-rc4.md0 savedefault boot title Debian GNU/Linux, kernel 2.6.13.3-vs2.1.0-rc4-RAID-hdc root (hd1,0) kernel /boot/vmlinuz-2.6.13.3-vs2.1.0-rc4 root=/dev/md0 ro initrd /boot/initrd.img-2.6.13.3-vs2.1.0-rc4.md0 savedefault boot Any help is appreciated. If there is a better/current HOWTO, please let me know. The ones I have seen so far refer to now deprecated tools (raidtools or raidtools2) and I have had a hard time trying to find the equivalent syntax for mdadm. -- Hari - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
