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Old 08-26-2007, 11:35 PM   #1
brokenpromises
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Registered: Jan 2005
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Raid


Hello,

I'm currently setting up a server with fake raid (RAID1 with 2 x 160GB SATA drivces) using Ubuntu Server 7.04. I did a quick google search and found a guide, and followed the instructions.

I'm currently on the "Partitions Formatting" diaglog box. It started at 33%, and hasn't moved in eons. It says "Creating ext3 file system for / in partition #1 of RAID1 device #0..." and is just sitting there.

There is a reasonable amount HDD activity, and I have no idea what's actually happening, since the progress bar / percent hasn't actually moved.

Any ideas?

Any help appreciated
 
Old 08-26-2007, 11:50 PM   #2
brokenpromises
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Nevermind, just me being a bit impatient. It took about 20 minutes of intermittent HDD activity to complete the process.

Makes you wonder why they actually put progress bars in
 
Old 11-16-2007, 02:11 AM   #3
stpurno
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I have been trying to install fake RAID 1 (2 x 250GB SATA) with Ubuntu 7.10 (gutsy gibbon) for 10 days now!!! I have obviously tried it many ways. The closest i have gotten is by following instructions here http://users.piuha.net/martti/comp/ubuntu/en/raid.html ...I want to run Linux truly but i am at my wits end. eg tried not having swap partitian RAIDed...separate boot partitian...etc.etc

Situation---when boot for the first time have to boot from CD
----when disconnect 2nd hard drive system does not boot even though i have made sure Grub loaded on both drives.
---even though RAID volume broken (degraded as per BIOS) Ubuntu states all is well when reconnect drive (using 'cat /proc/mdstat' to check)

the only thing i can think to do is flash Bios but i am a tad scared of stuffing it up and besides i can not get any of the boot discs off the net to work. Motherboard manuf states to use Win 98/2000 boot disc to do it with. None work on my system. Could it have to do with fact i am booting off CD instead of floppy?

Oh which way to turn????

Any help greatly appreciated!!!!!!!!!!

Last edited by stpurno; 11-16-2007 at 02:13 AM. Reason: left something out
 
Old 11-16-2007, 03:16 AM   #4
Disillusionist
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What do you mean by "fake RAID"?

If you are creating raid partitions on a single physical disk, you will get serious performance issues trying RAID 1.

RAID 1 performs write actions to two seperate hard disks (protecting against a single disk failure).

If you are faking this with vmware, then you not only aren't protecting against disk failures (it's still the same disk) but you are also making the disk write the same information to two completely seperate areas. This will cane the hard drive.

If you want to try RAID partitions as a training exercise thats one thing, however you are not getting a true feel for RAID as you are going to have a lot of negative performance that you wouldn't have in a real RAID setup.

That said, I have known "real" software RAID 1 partitons to take quite a while to perform their first sync (during partition creation) as the initial mirroring needs to check every block on the primary disks partition and mirror it on the secondary.
 
Old 11-16-2007, 07:59 AM   #5
stpurno
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as i mentioned i am using 2 x 250GB sata drives RAID 1 (mirror). I have just done my 1 millionth install tonight in a different fashion to all others and the results are the same.

Problem--i can not get OS to boot after install--not even from the CD and not even after reinstalling GRUB to the MBR *(via the rescue mode). The ONLY way to boot is to break the RAID (turn machine off- disconnect drive 2--restart which fails--turn machine off--reconnect drive 2) THEN SHE BOOTS!!!! but the BIOS shows raid as needing rebuilding. In Ubuntu though when i run "cat /proc/mdstat" it shows all as being just fine (fully synced in other words--there is 2/2 and UU active etc etc). If i then turn the machine off and disconnect drive 2 to simulate a failure the system does not start-it stops at the ubuntu boot screen and the progress meter does not go past about 3%.

There is some sort of co-dependency thing going on with the drives.

hmmmmmmmmmmmmmmmmm

Last edited by stpurno; 11-16-2007 at 08:21 AM. Reason: forgot something
 
  


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