The other day I was asked to help install a new DAE on a VNXe3100 for a customer. While it is a very simple process I thought I would share what I look for to make sure that things are working properly.
Step 1: Rack and Cable
After unboxing the new shelf we first need to get it into its new home, be it a rack or where ever. Next we need to cable the shelf, this part involves 4 cables: 2 power cables and 2 SAS cables. A fully populated DAE should draw no more than 250-300 watts under a heavy load, but make sure that where ever you are plugging in the power there is ample room.
The next part of cabling the system is to plug the SAS cables in. One end will attach to the new shelf and the other end will attached to the DPE (head unit) or the shelf below it, depending on if this is the first expansion shelf or not.
Remember that there is an “A” side and a “B” side to both units. The VNXe3100 shelves are easy to tell because they are on the left and right, but the VNXe3300 shelves are more like the VNX shelves so pay attention when you connect things. For the VNXe3300 shelf the “A” fabric is the bottom link control card, and the “B” fabric is the top LCC.
The DPE will always have small diamonds by the SAS ports and the shelves have diamonds and circles. REMEMBER always start with DIAMONDS (so the DPE side) and then connect the other end of the SAS cable to the circles (Shelf side). I like to remember it by saying you have to buy your girlfriend an engagement ring before you get married (wedding band = circle).
The back of the VNXe DPE’s are different depending on the model you have, here is the VNXe3300 connected to a DAE:
(Click the image for a larger version)
Next we have the VNXe3100, which looks a little different because its a 2u model and only has 1 SAS port per controller, unlike the 3300 which has 2 sas ports per controller.
Refer to these diagrams on how to connect the new shelf to the DPE, the purple lines are the SAS cable on the “A” fabric, and the red lines are the SAS cable for the “B” fabric. After getting the shelf connected to the DPE you will see the LCD display on the back of the shelf switch from “–” on both line control cards, to a number, this number will indicate the shelf number as the DPE sees it. If the LCD displays two dashes only, then the DPE does not see the shelf properly. Once it sees the shelf properly you can move on to the next step.
Step 2: Verifying the new drives are seen
Next login to Unisphere and click on the “System” tab, next find the “System Health” button and select it. Inside of System Health you will see a list of hardware on the left side. If you can see the DAE listed there then your VNXe is able to see the new hardware. To be more thorough you can click the drop down arrow to the left of DAE and it will list out all the disks that it can see in it. Verify that it sees the correct number of disk drives.
Step 3: Putting the new drives to work
The final step that we need to do is put our drives to work, and to do that we have top options.
- Add the drives to an existing drive pool
- Create a new drive pool
Which one you select will depend on what you are trying to accomplish. You should work with your VAR, or EMC to determine which is the best use of your new hardware.
If you are going to add them to a pool select the existing pool and click details. Inside of the details window there is an “Add Disks” button at the button, click that and follow the wizard and your new drives will be added to the pool.
If you are going to create a new pool, simply follow the same steps you did when creating your old pools.
That about does it, like I said it is a very easy process and should take you no more than a few hours to complete.