DANGER!!! Problems with 10.04 installer (RAID devices *will* get corrupted)

Karl Larsen klarsen1 at gmail.com
Thu Apr 22 13:33:51 UTC 2010

On 04/21/2010 10:48 PM, Alvin Thompson wrote:
> On 04/22/2010 12:18 AM, Christopher Chan wrote:
>> You mentioned md0 aka a Linux software raid array and therefore do not
>> have any 'raid' devices setup in BIOS.
> correct
>> The 'raid' bios will not,
>> therefore, attempt to do anything on your disk.
> I don't have a RAID BIOS at all, and in the case of bug 191119, the
> reporter's BIOS did not attempt to do anything to the disk except
> assemble the RAID array AFTER the install.  Assembling a RAID array does
> not modify the data.  It was the installer that wrote to a drive that
> was a part of the RAID array, and when the computer was rebooted the
> BIOS could not reassemble the array because that drive was hosed.
>> Otherwise, it would have
>> trashed your md0 a long time ago.
> Once again, assembling an array does not modify your data.  It simply
> means that the hardware (or software for software RAID) combines
> multiple disks or partitions to create a single virtual device.
>    Please STOP adding comments to those
>> bug reports because you have just completely confused the issues.
>> #191119 (sorry Xander - missed the part where it says Alvin made the
>> comment) has NOTHING to do with what you are currently seeing.
> Actually, it appears you are the one who's unclear one what assembling
> an array does, exactly.  This is the same issue.
         I did not know what RAID is for sure. Now I know it is a cheap 
way to get some redundancy. See the things at


Very informative and it makes it clear to me that backup which I use is 

73 Karl


	Karl F. Larsen, AKA K5DI
	Linux User
	#450462   http://counter.li.org.
         Key ID = 3951B48D

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