For mead, you need to use honey in your starter to prime the yeast for mead fermentation. Using DME primes yeast for maltose fermentation, which is useless for mead. In fact, pitching a DME based starter into mead will stress the yeast out leading to off flavors. Here is how I do it for BOMMs:
2 Liter Starter for Mead
1. Sanitize 2 liter flask with cross shaped stir bar.
>To sanitize, use StarSan, OneStep, or cook it on the stove burner (let it cool before Step 2). I avoid iodine based cleaner due to staining.
2. Add 1 tsp GoFerm.
3. Add 1/2 cup honey (6 oz by weight).
4. Add sterile spring water to 1.8 liters.
5. Pitch smacked pack of yeast or rehydrated yeast
>Final volume close to 2 liters with smack pack volume added.
>I generally do break the internal packet for the nutrients, but you don't have to wait to pitch.
6. Allow to stir on stir plate for 3 days.
>Stir plate is best, but if you don't have one, just swirl it when you can and go an extra day.
7. Pitch in your mead. Don't forget that the starter will add 2 liters of volume!
For larger batches (>5 gallons), I just make a starter that is 1/10th of final volume and pitch after the yeast are obviously boiling.