Shortly thereafter, a series of unofficial, non-engineering 2.1 ROMs were also leaked, the third of which ended-up the basically the final version that HTC/Verizon would officially release. Those that succumbed to installing one of those versions discovered that they would be unable to install the earlier rootable engineering ROM due to an hboot version incompatibility. Root for the "2.1 leakers" seemed like a far-away dream.
Some of you might be aware that the HTC Droid Eris was released at the same time as the Motorola Droid (i.e., the "OG Droid"
). These were both VERY popular devices and had a lot of very bright and industrious folks using them. You might be familiar with a certain person who goes by the name "jcase" who also had an Eris and did root-related development for that device (he also created a few custom ROMs for the Eris).
Anyway, fast-forward past a few very frustrating months to July 2010 and a couple of very stubborn, enterprising guys at XDA (tereg / dc_striker / Hairson)
figured-out a (very difficult) way gain root through a SD card / adb timing method.
[ ^^^ root method #2: SD card race condition -- VERY difficult ]