Thank for reply. Yeah i see this as a gap in DELL SD card implementation

To format these:

1. Power off server, open cover, physically remove both SD cards
2. Connect to microSD card reader and your PC
3. Open elevated CMD (DOS) prompt and enter: diskpart
4. Next Command: list disk
5. Here you'll find the 16, 32, or 64 GB card listed along with any other storage installed, so take care to document the proper disk # you need
6. Next Command: select disk x   (where x is the number associated with the SD determined in step 5)
7. Next Command: clean
8. This now has wiped ALL partitions from the device, though it's in no way a secure wipe, or remotely considered a DoD or NSA wipe as data could be recovered
9. Swap out SD cards, start at Step 4 and run through things again
10. To exit diskpart, close out the CMD window

Once both cards are wiped, it will more or less prevent use of them as IDSDM module cards because I presume there's some custom bootloader Dell applies from the Factory.

We had ESXi 6.7 on those, but installed a BOSS card and ran a fresh 7.0.3Uf install, and the system accidentally rebooted to IDSDM and then to 6.7 which was NOT great, so without a BIOS, OS, or iDRAC way to wipe them we went this route.

Now with both cards installed, it squawks in vCenter that fault tolerance is down and it can't write to either. As of yet, I've found no way to reflash them back to Dell config (though with no OS or bootable data) so please use the diskpart method with caution as if you want to use those card later, I see no way to reflash them so you might have to buy new ones.