They probably will, but I can't say for sure. I would recommend going with a class 10 card though. Here is what I know about the IDSDM: It has no stated size limitations on SD cards. We only sell 1GB SD cards with it(on the R815). The 2GB SD card is listed as a valid replacement for the 1GB cards in my parts database for the R815. There is not a lot of specs available on the IDSDM. It appears to be an extremely basic pass-through/converter that takes SD cards and presents them as USB 2.0 devices to the system board. According to documentation the IDSDMs in 11th and 12th generation servers are identical in functionality. I have 2GB SD modules in my R720. Based on all of this information 1 and 2GB modules should work without issue. Nothing states that larger sizes will not work, but we don't sell them in that configuration. The 8GB module is intended for Vflash. Here are the part numbers I have listed on the R815. You will need to call spare parts to order these: 0XW5C - 8GB Intended for Vflash(Vlash can use any size card up to 8GB) 738M1 - 2GB Intended for Vflash, but listed as a valid replacement for 1GB Modules P789K - 1GB Intended for SD Module RX790 - 1GB Intended for SD Module The 8GB modules will likely work, but I would recommend testing before buying them for all of your servers. I'm sorry I can't be more specific, but the most detailed information I can locate on size limitations is in the technical guide book under SD module size it lists: Multiple. Thanks
We have 2 R815's connected to MD 3220i running esxi 4.1 free. Currently esxi is installed on the HDD. I am planning to add 2 SD card's in the R815 and install esxi on them.   1. Can I use any SD cards? Is there a size limit?  I want to have the 2 cards in high  availability. I believe there is a BIos setting to do that. 2. Am planning to use PoserCli commands Get-VMHostFirmware -backupconfiguration and then the "set" command so I do not have to redo the configuration again.  Appreciate any comments. Thanks Nihar
SD card for R815