[Galaxy Tab S General] feretio:
I have a rooted SM-T700 tablet but unfortunately, couldn't do an OTA update because I keep getting this error:

I've read through this whole thread and thought I'd share & summarize my experience. I wanted to make sure to do the update correctly while retaining root. While I'm technically savvy, I'm by no means an expert here so please feel free to correct me on anything.

This seemed like a good how-to for updating an image with Odin:

http://updato.com/how-to/how-to-install-an-official-samsung-stock-firmware-using-odin

I found I could download the image from:

CF-Auto-Root-klimtwifi-klimtwifixx-smt700.zip (size 1.5GB) from http://www.firmwares.androidinfotech.com

I selected region XAR (for U.S.) and v6.0.1 of course.

I also checked http://samsung-updates.com/device/?id=SM-T700 and verified the download link & MD5 checksum is the same. I also just checked the zip file SM-T700_1_20160817100614_yll1hgixb3.zip from http://fw.updato.com is also the same (I used the unix diff on all the .tar.md5 files above). Going forward, I'd use the updato.com since it's a direct download.

I unzipped CF-Auto-Root-klimtwifi-klimtwifixx-smt700.zip to produce T700XXU1CPH5_T700XAR1CPH4_HOME.tar.md5 (2.4GB).

I downloaded and installed the Samsung USB Driver v1.5.51.0 from http://developer.samsung.com/technical-doc/view.do?v=T000000117

Using zigonneux's link in this thread (http://xdaforums.com/attachment.php?attachmentid=3884063&d=1474646304), I downloaded Odin v3.12.3 and will use that to install the update. This might be a good place to grab it as well: http://odindownload.com/SamsungOdin/

I booted my SM-T700 into Download Mode by turning it off, then pressing VOLUME DOWN + POWER + HOME, then VOLUME UP to go into Download Mode. If you accidentally press VOLUME UP but meant to reboot, hold down VOLUME DOWN + POWER until it restarts. This is the equivelant of a battery pull which you can use anytime.

I plugged in the SM-T700 using the Samsung USB cable and made sure Windows 7 saw the device. Two lines show up in the device manager pop up.

I started Odin v3.12.3 and made sure I had a blue box under ID:COM. In Odin's Options, I had only "Auto Reboot" & "F. Reset Time" checked. I clicked AP, selected T700XXU1CPH5_T700XAR1CPH4_HOME.tar.md5 and clicked start.

To give an idea has to how long it took, here's a timeline of what happened:

17:05:30 Download to device start

17:08:59 Reboot start

17:11:56 Android is upgrading... Optimizing app xxx of 269.

17:21:30 Finishing boot

17:22:01 Password screen

My tablet was not wiped at all and was now running Marshmallow but I no longer had root.

It insisted I updated Google Play services so I did that. I had some trouble with the wifi speed but another reboot seemed to fix that.

From what I read, the only way to get root back (and please feel free to correct me) was to install TWRP and use TWRP to install the latest SuperSU.zip (https://download.chainfire.eu/1003/SuperSU/SR1-SuperSU-v2.78-SR1-20160915123031.zip) from Chainfire.

I installed TWRP using Odin using these instructions:

http://rootmygalaxy.net/install-twrp-recovery-on-samsung-devices-using-odin/

It's essentially the same exact process for installing the Marshmallow image.

Lastly, I installed SuperSU*.zip using TWRP using these instructions:

http://androiding.how/how-to-flash-supersu-using-twrp-recovery-and-root-any-android-device/

After the tablet rebooted, I had root once again.

I presume knox is tripped at this point but I don't think that matters to me (or should it?) I'll also be surprised if Samsung releases any further updates for the SM-T700 but if not, I presume I'll need to manually keep an eye out for updates since I probably won't be alerted to any further OTA updates.