Hardware Thread, Nas raid server with Linux? not booting in Technical; I know nothing about these things, as I was brought up on Windows.
The first disk (primary) out of four ...
14th October 2011, 02:59 PM #1
Nas raid server with Linux? not booting
I know nothing about these things, as I was brought up on Windows.
The first disk (primary) out of four in the raid was reported bad by the smart diagnostics. I replaced the disk but it doesn't boot and gives out these three lines at the end.
VFS: Cannot open root device "md3" or unknown-block(0,0)
Please append a correct "root=" bot option
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
Ok, so I have to edit and change something to get it to work, but as a starting point how to I even do that? Do you have to use some sort of bootable USB? and what config's am I likely to need to change? I think the system is using something called LILO (v.22.6.1) if that's any help.
18th October 2011, 12:53 AM #2
- Rep Power
1. Does it boot with the new disk removed ?
2. Is there a controller BIOS setup screen (Ctrl-A at boot up, for example) ?
3. Is this a "regular" server with multiple drives, software RAID, and linux loaded ? If not, what is the manufacturer ?
One thing in my experience that matches this is a system with software raid, that is trying to boot from a hard drive that was never bootstrapped. One can start up a system from drive 0. install Linux on software RAID, and think "Aha! Now I am safe!." But without loading LILO or GRUB into the boot block of the second physical hard disk, if disk 0 fails, the O/S has nothing to boot from.
Another alternative, presuming SCSI disks, is the need to set the disk controller BIOS (e.g. the Adaptec 29160 or what have you) to boot from the second SCSI ID if the first one has failed and been replaced. Otherwise, the BIOS goes to the first disk, which was replaced and has no boot block. and fails to boot.
Thanks to mister_z from:
Zourous (19th October 2011)
18th October 2011, 09:56 AM #3
Are you sure you replaced the right disk? Linux doesn't neccesarily enumerate disks in the order they happen to be arranged in.
Originally Posted by Zourous
Is this a bought device, or a home-made server? If it's bought I'd be surprised if the OS was on the RAID array along with the data. If you boot the machine off SystemRescueCD, it should scan the machine for any software RAID arrays, full or partial. After that you can tell mdadm (the utility that handles arrays for you) to add the new disk to the RAID array and to start syncing data.
Thanks to dhicks from:
Zourous (19th October 2011)
By freakyleaks in forum Windows Server 2008
Last Post: 27th August 2009, 03:43 PM
By DAckroyd in forum Hardware
Last Post: 6th April 2009, 03:03 PM
By jonathan.lees in forum *nix
Last Post: 27th March 2008, 01:09 PM
By cooper in forum Windows
Last Post: 30th November 2007, 09:47 AM
By localzuk in forum *nix
Last Post: 27th January 2007, 03:21 PM
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)