Download a boot disk from hear click here top one on list, start with the disc it will load CD drivers but the letter may change for example if you CD letter was D:\ it may now be E:\ until you get windows loaded
A problem with Win98 (that was fixed in WinME) is that when you create an Emergency Boot Disk in 98 the CD-ROM driver is NOT automatically added, so when you boot with it there is no CD drive! How the heck MicroSods let that one through I don't know, but there you go! You either have to add the CD-ROM driver manually to your boot disk or use an off-the-shelf version such as woodchip has mentioned. LC.
You mentioned that it's "a formatted 2.1Gb" .... how do you know its formatted; not trying to be clever just asking if you formatted it or if someone told you that they have formatted it.
As woodchip suggests download a boot disk and then, at the A:> type FDISK and select optioon 4 to view partitions. This will give much information about if the drive is formatted, the file type (could be NTFS) etc.
It was a known problem with Win98, as I understood it, that CD-ROM drivers weren't copied when a boot disk was made. The 98 on my earlier IBM Aptiva certainly had that problem! Perhaps the later 2nd edition fixed it? Cheers. LC