When editing your own question, sometimes the initial problem is something completely different to what you expected, and the original question becomes obsolete. How far do you think you should edit and refine a question before simply opening a new one?

Recent example:

• http://serverfault.com/questions/363784
• Why does RAID5 with an odd number of data disks have poor write performance

When editing your own question, sometimes the initial problem is something completely different to what you expected, and the original question becomes obsolete. How far do you think you should edit and refine a question before simply opening a new one?

Recent example:

• https://serverfault.com/questions/363784
• Why does RAID5 with an odd number of data disks have poor write performance