Is there a particular brand and/or size USB hard drive that the 2800 series routers will recognize? In the past I have used a 1 to 2 GB USB stick and formatted as FAT. Most of these would be recognized. However, now we are not longer allowed to utilize the USB Tokes, but we can use a Serialized USB Drive to upgrade. I have tried a WD 250 GB drive and partioned it to 1GB (the rest is wasted). Even after formatting, the drive is no recognized by the router. As a side not, our IA team will not allow ANY USB Tokens, including the Aladdin line, to be used.
Any suggestions as to how to accomplish this or how to update the IOS without using USB Tokens or TFTP?