Raju, thanx for your posting, it very informative. Raju Mathur wrote: > Hi Archan, > > Making RAID-1 (mirror) devices is quite straightforward. Here's the > procedure you apply: > > 1. Make identical size partitions on 2 hard disks, say sda5 and sdb5. > If the partitions aren't the same size, the RAID partition will be the > size of the smaller one, leaving some space unused (wasted) on the > larger partition. Make the partition types FD (linux RAID > autodetect). > > 2. Reboot after fdisk :) > > 3. Install a new kernel (2.4.x) which has the RAID-0.90 code. I > prefer to put RAID-1 in the kernel; however you can make it a module > if you like (and use a ramdisk boot image if you're doing this for > your root partition). Boot with the new kernel. > > 4. Install the raidtools for 0.90. Old raidtools will NOT work with > the new RAID code in the kernel. On Debian, the package is called > raidtools2, forgotten what it's called on RH ;-) > > 5. Create /etc/raidtab. I usually: > > man raidtab | col -b > /etc/raidtab ; vi /etc/raidtab > > and then edit out everything, just leaving the the sample RAID > configuration. Edit the device partition names for your > configuration. Enable persistent superblock. > > You could also create raidtab from scratch, it's not tough -- just > boring. > > 6. mkraid --really-force /dev/md0 (assuming you called your RAID > device md0 in /etc/raidtab). Your logical RAID device is now ready > for use. > > 7. RAID will now start syncing the 2 disks in the background, and the > system may appear sluggish until the syncing is finished. You can see > the status of the device and the sync progress with: > > cat /proc/mdstat > > Sync typically takes 5-30 minutes depending on the size of the > RAID device and the speed of the disks. If you ever switch off your > computer without a proper shutdown, the disks will be sync'ed again. > > 8. mke2fs /dev/md0 (or mkreiserfs or mkfatfs or whatever). You can > do this while the sync is going on, though it might be a bit slow. If > you're the patient type, go have a cup of tea/call your > girlfriend/meditate and run the command after the sync is over. > > Warning: using Reiserfs on RAID needs special kernel patches. > > 9. mount /dev/md0 /raid-directory (choose your directories/device > appropriately). > > 10. Put an entry for the RAID device in /etc/fstab. It'll be just > like any other fstab entry, except the device will be /dev/md? instead > of /dev/sd?? or /dev/hd?? . > > 11. [OPTIONAL] Send me a vegetarian pizza. I prefer Domino's veggie > deluxe deep dish with twisty bread -- you can skip the cheesy dip if > you're feeling broke-ish ;-) > > CC'ing this to LIH and LD to enhance pizza inflow :-) > > Regards, > > -- Raju > > >>>>> "Archan" == archan <[EMAIL PROTECTED]> writes: > > Archan> Hi Raju, any special tricks u applied? or it is straight > Archan> forward... > > Archan> archan [EMAIL PROTECTED] > > Archan> Raju Mathur wrote: > > >> Hi Archan, > >> > >> I found out to my discomfort the hard way :) > >> > >> Anyway, the choice was between Debian and RH, I went with > >> Debian anyway. Installed RAID after the system came up. > >> > >> Regards, > >> > >> -- Raju > >> > >>>>>>> "archan" == archan <[EMAIL PROTECTED]> writes: > >>>>> > >> > archan> Raju Mathur wrote: > >> >> Will Debian 2.2 allow me to install on a root RAID > >> partition? >> E.g. RH gives me the facility to define a > >> software RAID >> partition at install time and install my / on > >> that. Anything >> equivalent for Debian (2.2)? > >> > archan> By default NO!!!! > >> >> If the answer's Yes, there're these 8 machines I have to >> > >> install Linux on tomorrow, and guess which distribution will >> > >> get installed? :-) > >> > archan> Best is Mandrake7.2 .... :) By default it will .... > >> > archan> archan [EMAIL PROTECTED] > > -- > Raju Mathur [EMAIL PROTECTED] http://kandalaya.org/ > > ---------------------------------------------- > The mailing list archives are available at > http://lists.linux-india.org/cgi-bin/wilma/linux-india-help -- Regards ph:5099025 RaghuNath L pager:9624395369 WSS-Team,Texas Instruments India. You have to live on the edge of reality - to make your dreams come true!!! ---------------------------------------------- An alpha version of a web based tool to manage your subscription with this mailing list is at http://lists.linux-india.org/cgi-bin/mj_wwwusr
