I made a post on my guild forums about this, but I figured that I would also spread my knowledge here as well. The reason I did this was to have a raid be able to keep track of cooldowns on Sarth3D, but I'm sure there will be future fights that it will be useful as well. Sorry I don't post often enough here, too many people aggravated me.
First off, in addition to having DBM, you have to install another plugin for DBM to track spell/skill cooldowns. The link to this plugin is: http://www.deadlybossmods.com/download.php?id=4
Once the plugin is installed, my post tells you how to do the rest:
This post is to help healers, other tanks, or any raider that wishes to see the status of a tank's "oh @&$#" buttons. It does not include trinkets, but it does have valuable information regardless. Items with only a CD timer are listed because the buff goes away based on damage, not a timer.
Open DBM, click the options tab, then click on the Spell/Skill Cooldowns list. Scroll to the bottom of the list and click the plus sign to add a new slot. Here is a list of the spell IDs and the cooldowns:
Warrior
871 ---- Shield Wall: %player -------------- 12
871 ---- Shield Wall (cd): %player -------- 300
12975 - Last Stand: %player -------------- 20
12975 - Last Stand (cd): %player -------- 300
Druid
61336 - Survival Instincts: %player ------- 20
61336 - Survival Instincts (cd): %player - 300
22812 - Barkskin: %player ------------------- 12
22812 - Barkskin (cd): %player ------------ 60
Death Knight
49222 - Bone Shield (cd): %player --------- 60
48792 - Icebound Fortitude: %player ------- 12
48792 - Icebound Fortitude (cd): %player - 60
48707 - Anti-Magic Shell: %player ----------- 5
48707 - Anti-Magic Shell (cd): %player ---- 45
51052 - Anti-Magic Zone (cd): %player --- 120
55233 - Vampiric Blood: %player ----------- 20
55233 - Vampiric Blood (cd): %player ------ 60