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193 Posts

10-12-2008

Seattle, US

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Why WAN slot no longer accepts 2242 SSD?

2021-08-20, 9:46 AM

I've been using a separate 2242 SSD in WAN slot for a long time, from T470 to T480. However recently when looking at upgrade options, I noticed that this is no longer supported on T14 Gen 2. The same for almost all ThinkPads of this generation.

 

Why is this whitelist for devices in WAN slot? It is a SSD which is not going to cause any harm to the hardware I assume? And I am not installing after market WAN card so there's no revenue loss anyways?

 

Do we have a good reasonable answer for this design change from Lenovo?

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6571 Posts

08-02-2018

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Re:Why WAN slot no longer accepts 2242 SSD?

2021-08-20, 13:02 PM

Hello ccl13!


Welcome to community forums

 

 

There has always been a whitelist that OEM certifies and registered to the regional telecommunication department. Whitelist ensures national standards and safety are regulated as well as user safety and performance.

 

Would you have any specific machine type model(MTM) of concern?

 

Let us know.

 

 

Jwes_Lenovo



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193 Posts

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Re:Why WAN slot no longer accepts 2242 SSD?

2021-08-20, 17:34 PM

Thanks for the information. I think that's a somewhat legit reason. But perhaps it does not have to be applied to SSD?

I am looking for an upgrade to T14 Gen 2 both 20XK and 20W0. As far as I know, both model no longer allows a SSD in WAN slot. Will trigger a warning and refuse to boot. I do have X1 Nano that does this too, although for that I don't need a second SSD so it is fine for me.

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Re:Why WAN slot no longer accepts 2242 SSD?

2021-08-20, 21:34 PM


I see. Here is also an additional topic related to this: https://forums.lenovo.com/t5/ThinkPad-L-R-and-SL-series-Laptops/Thinkpad-L14-M-2-2242-SSD-in-WWAN/m-p/5056556

 

Regards

 

 

 

Jwes_Lenovo



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193 Posts

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Re:Why WAN slot no longer accepts 2242 SSD?

2021-08-21, 0:52 AM

Hi Jwes,

 

Thanks for the related thread. I've reviewed this while investigation my upgrade possibilities.

 

Do we have more information about what is being changed prohibiting SSD to perform correctly in WWAN slot? I mean besides the added Whitelist. I am under the impression that there's nothing blocking a SSD to work in that slot, although I do understand it might not work with all SSD that can be installed due to different interface protocol.

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Re:Why WAN slot no longer accepts 2242 SSD?

2021-08-23, 21:43 PM

Yes, with the updated protocol some SSD interfaces would be blocked and the SSD is not the issue itself.

 

 

Jwes_Lenovo



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193 Posts

10-12-2008

Seattle, US

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  • Message 7 of 12

Re:Why WAN slot no longer accepts 2242 SSD?

2021-08-23, 21:47 PM
But why this change? I understand the blocking of uncertified WWAN card, but why blocking SSD?
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12561 Posts

01-02-2010

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  • Message 8 of 12

Re:Why WAN slot no longer accepts 2242 SSD?

2021-08-24, 4:34 AM

I believe issue is not related to any whitelist.  An SSD needs leads in the socket connected that are not available


Rich


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193 Posts

10-12-2008

Seattle, US

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  • Message 9 of 12

Re:Why WAN slot no longer accepts 2242 SSD?

2021-08-24, 17:31 PM

Thanks Rich. However I don't understand this, because:

 

1) when trying to boot a T14 Gen 2 with a installed SSD at WAN slot, boot sequence will be halted by error message 1802; and such message means the motherboard can enumerate the SSD and is sure that it is not one of the allowed WAN cards.

 

2) I understand SATA SSDs could be missing some functional pins, but NVMe SSDs are just plain PCIe interface at the slot. Some of them are configured to use 4x lanes which is not possible for WAN slot that again I understand. But B-Key configured SSDs can just use 2x lanes which is exactly what the WAN slot should provide, and some of them would work with only 1x lane. I am not aware that any leads could be missing for these SSDs because they are electrically exactly same as a WAN card at the slot.

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40 Posts

05-31-2021

United States of America

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Re:Why WAN slot no longer accepts 2242 SSD?

2021-08-26, 5:13 AM

The hardware (or at least revisions of it sold until recently) is capable of running an NVME SSD card (of the appropriate keying and size). Multiple users were successfully running cards in the WWAN slot. But a BIOS update ~1-2 months ago introduced the whitelist you encountered, blocking all cards (WWAN or SSD) that aren't on the parts list. (There were a few threads at that time.)

 

I wouldn't expect to get a real official answer on why this was done. Personally, I don't buy the claims around compatibility or certifications; modular PCs that are expandable with 3rd party components like this are sold in a thousand variations. More likely, Lenovo's marketing strategy simply doesn't involve selling an expandable platform, and you're expected to buy the configuration you want straight from them.

 

You may be able to run your card by downgrading the BIOS (which requires first removing the card). As far as I know, BIOS updates since then haven't introduced any actual improvements, so you wouldn't be missing anything (for now).

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