[cobalt-users] How are people handling fault tolerence?

[Chip <chip@xxxxxxxxxx>]

I will soon be responsible for administering a Raq server that will host a 
bunch of customers' sites and email.  Currently, we are reselling but we're 
switching to dedicated.

For those of you that are hosting 100 sites or less, how do you handle 
redundancy and/or failure?  I see several possibilities:

1. Keep good backups and hope the Raq doesn't go down, then hustle to get 
another one if it does. (Not a very good choice, IMHO, but a lot of folks 
seem to be doing this)

2. Install an IDE RAID-1 mirror in the Raq, realizing that a hard drive 
failure is probably the most likely cause of death.

3.  Buy 2 Raq servers, mirror information between them and locate in same NOC

4. Same as above, but locate them in different ISPs with different NOCs.

Option 4 seems the most bulletproof, but also the most costly.  I'm very 
curious what others are doing, particularly given the horror stories I've 
been reading about the non-functional Raq backup solutions.

Comments very much appreciated!!

Thanks.

Chip