try this, little more complicated but works
To start I have rooted many phones but am stumped on this tablet. After getting it to start with holding the volume down and power key it stops on the downloading screen. Once I can get it to reboot I held the volume up and power key and got into system recovery. If I am not mistaken I can boot from here also. Right??
1. Download Samsung Klies via Samsung website on your windows based pc.
2. Connect your tablet to your pc via usb cord.
3. Run Samsung Klies first to make sure you have drivers for your device.
4. Back up all data on tablet using Samsung Klies
5. Download Kingo Root for your windows based pc.
<<<< Available @ kingoapp dot com free of charge >>>>(new user, can't post links yet)
6. Run Kingo Root with your tablet connected to your pc via usb and follow on screen instructions.
<<<< Root will come back as an unsupported device, this is ok, you have the root program on your tablet and we are not done yet >>>>
To finish ROOT on SM-T217A Tablet you have to perform the following steps:
1. Disconnect USB cable from phone.
2. Go to Menu->Settings->About Device.
3.Tap on "Builds numbers" 7 times to enable developer options.
4. Go to Menu->Settings->More->Developer options.
5. Turn on "USB Debugging" option.
6. Go to Calculator application. Enter "(+30012012732+" number, to get phone dial window.
7. Enter "*#0808#" number.
8. Select "DM+Modem+ADB".
9. Close window.
10. Go to dial window.
11. Enter "*#9090#" number.
12. Set "Diag config" to "[1]DM/DUM over HS-USB" value.
13. Restart phone.
14. Press "Read Info" in software.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
<<<< Not super important to find this next part I found out but decided to include it anyway>>>>
Platform: Samsung Android
Selected port: COM12
Selected model: SM-T217A
Mode: Normal
Phone model: SM-T217A
Firmware compiled date: Jul 23 2013
Firmware compiled time: 07:00:00
Firmware released date: Aug 21 2013
Firmware released time: 01:47:45
Phone IMEI: 357************
SW Version: M8930B-AAAATAZM-5.0.060093
Unlocking phone...
Creating NVM backup
Reading NVM done!
ADB server killed.
Firmware compiled date: Wed Aug 21 01:10:50 KST 2013
Phone SN: R31D90EKPPA
Android version: 4.2.2 (JDQ39)
Cheking Root
Deactivating MSL...
MSL deactivate successfully
Phone will restart now. Please don't disconnect cable!
Firmware compiled date: Jul 23 2013
Firmware compiled time: 07:00:00
Firmware released date: Aug 21 2013
Firmware released time: 01:47:45
Incorrect IMEI
SW Version: M8930B-AAAATAZM-5.0.060093
Found phone on COM12
Repairing NVM for SM-T217A phone...
Phone is successfully unlocked
To finish the operation, please restart the phone via phone's menu (don't disconnect the battery!)
FINAL STEP, PLUG THE TABLET BACK INTO YOUR PC VIA USB CORD, THEN RUN THE KINGO ROOT APP ONCE MORE. ONCE THE APP CONNECTS TO YOUR DEVICE IT WILL SHOW: YOUR DEVICE ID E.G. SM-T217A, RIGHT BELOW THAT IS YOUR ROOT STATUS, IT SHOULD SHOW YES.
After yes is displayed you are free to install any root requiring program to your device such as system optimizers, oem clutter app removale tools ect.
**hint** if you are using googlee play store on your device just run a search for ROOT to dispaly rooted phone requiring apps.