[Discuss] software RAID 1 questions

[David Bronaugh]

R. Langkamer wrote:
> On 2/17/08 5:49 PM, Ken Murray wrote:
>
>> On Feb 17, 2008 3:50 PM, R. Langkamer <vlug at langkamerit.com> wrote:
>>
>>> 1) is it possible to take an existing single drive setup and migrate it
>>> to software RAID 1 setup on the same machine?
>>
>> Here's how:
>> http://www.linuxconfig.org/Linux_Software_Raid_1_Setup
>
>
>     That looks very promising! Thank you.
>
>     One last question that has arisen since.
>
>     Is having a RAID 1 setup on a single IDE bus completely disastrous?
>
Depends.

If a drive goes totally haywire and eats the IDE channel, then yes -- 
it's a bad thing. You will have downtime. But you aren't that likely to 
have corruption.

The performance will also be degraded a bit, but it shouldn't be that 
extreme.

You can set RAID1 to fail over very nicely using LILO. Once upon a time 
I set up lilo + raid1, then had one of the hard drives overheating -- 
that was fun. RAID1 worked dandy in that circumstance to keep things 
running. With lilo configged right, didn't even have problems booting.

I think I may still have had the two disks on the same channel -- but 
I'm not sure.

Anyhow, hope this helps a bit.

David