HP 2114A value??

You wrote... picture I believe the manual states something to the effect of "mechanically equivalent to an IBM 2313", but NOT interchangeable. There is a major thing to watch out for here. The disk cartridges are virtually identical between the 7900, and the 7905/06. However, one is a 50 mil platter and one is a 75 mil platter. I forget which one goes with which drive. I believe the 75 mil is 7900 and 50 mil is 7905/06 but I will verify this for sure. Most media has an HP part number on it that will tell you for sure, but once you get used to looking at them you can tell easily by opening the cartridge access door and looking at the platter (thick or thin). Put one media in the wrong drive and it won't work, put the other media in the wrong drive and you're gauranteed a very expensive and time consuming set of repairs :) To my knowledge, the cartridges used in the 7900/05/06 are not the same as in other common 14" drives I've run into at least. You may also run into problems using other media due to the certification of the density of the platter. I THINK the ones HP used were 2200? and They are a AA form factor nicad battery. Read the specs off the battery and get replacements just like it. I got mine at "batteries plus", it's a chain of battery stores here. YES there is a reason. The two heads for the removable platter and the two heads for the fixed platter are on the same armature. You can NOT run the drive at all without the removable media in place. They are used to retract the voice coil, which holds both sets of heads. They are not independent, so the nicads are for both. Air blows from the vents in front (replace the foam in the access door by the way), through the squirrel cage to the filter. The filter splits the airflow in two. One (through the big orange tube) blows over the power transistors on the regulator board at the bottom. The other air flow goes into the bottom (fixed) platter chamber. A hole in the top of the bottom chamber lets the air blow into the media cartridge casing (when you put the media in place and close the door, a trap door in the bottom of the media opens right over the hole in the top of the fixed chamber). All air is exhausted out the opening where the heads go in and out. have Then it does have a front and back section, back section for memory. In the front, there should be some designation as to what slots are for cpu cards and what slots are for I/O cards. The 2100 for example has blue on the cpu card section and red on the I/O card section (as the slots are different electrically), and a black section for the memory. Sounds like the core memory section on the 2114 is VERY different from the core section on the 2100 (and 2116). Ok, with the card numbers off the circuit boards I could probably tell you more. I'd recommend going to great lengths to find the docs that supposedly came with the system!! Jay --- [This E-mail scanned for viruses by Declude Virus]