2960X Stack - upgrade IOS with different model version

[Dejavuu]

Hello,

I have six switch stack with three other model versions:
WS-C2960X-48TS-L 15.2(2)E5
WS-C2960X-48FPS-L 15.2(2)E1
WS-C2960X-48TS-L 15.2(2)E3
WS-C2960X-48TS-L 15.2(2)E3
WS-C2960X-48LPS-L 15.2(2)E7

What is a way to update all to 15.2E7? I read some topics and many people talk about easy command:
archive download-sw [options] [options] tftp://<TFTP IP address>/IOS_filename.tar
But in my case when i have three different model versions = three different type of firmware i don't know now what to do.
Help me guys

[Leo Laohoo]

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@Dejavuu wrote:
What is a way to update all to 15.2E7? 

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archive download-sw tftp://<TFTP IP ADDRESS>/<IOS FILE>.tar

[pieterh · Accepted solution]

if necessary, you can verify in the release notes what upgrade paths are possible
Release Notes for Catalyst 2960-X and 2960-XR Switches, Cisco IOS Release 15.2(7)Ex - Cisco

but the version differences are minor!     15.2(2)xx -> 15.2(2)E7
-> OS commands are exactly the same
=> you can update all with the same command (as provided by Leo)
as the image is "universal" the same will be valid for all switches not depending on license
Software Download - Cisco Systems

[Dejavuu]

After update firmware i have problem with two switches in same model WS-C2960X-48FPS-L, these two can't get up, when i connect via console there was a problem with image IOS it was corrupted after upgrade. So, i was trying to "format flash" and transfer new image from download site cisco. But when i try to manual boot from new imagae i have same error:

File "flash:c2960x-universalk9-mz.152-7.E7.bin" uncompressed and instaled. entry point 0x3000
exetucing...
Boot process failed.

Also i was try set bot and this is going fine but still when i try boot flash:c2960x-universalk9-mz.152-7.E7.bin i have error like upper. All of this step i make in switch mode button.

[Leo Laohoo]

Cold-reboot the switch. 

[Dejavuu]

I already did that earlier few times and it didn't help

[Leo Laohoo]

RMA the switch (while it is still possible).

[Dejavuu]

I downgrade IOS to 15.2.6E3 and one of these two whos can't get up after update now work (i dont know why another one still can't boot with new 15.2.6E3 image). But another problem is when i try to add to stack. Like i said i format flash, install new image without connecting stack cable. Next i was turn off the switch, pluged stacks cables and turn on but it can't add to existing stack. I tryied provision it from stack but sill dont work.