| This Service Number (available in the System Information screen) | Means This Manufacturer | And
one of these models (within each row, all are compatible for the upgrade) |
| 000 | Philips | HDR112 – HDR612 (14, 20, 30, or 60 hours) * |
| 001 | Philips | DSR6000,
DSR6000r, DSR600r01 * |
| 002 | Philips | HDR112 – HDR612 (14, 20, 30, or 60 hours) * |
| 010 | Sony | SVR-2000 |
| 011 | Sony | SAT T-60 * |
| 031 | Hughes | GXCEBOT, GXCEBOTD |
| 101 | Philips | DSR7000, DSR7000R |
| 110 | Sony | SVR-3000 |
| 121 | RCA | DVR39 |
| 130 | TiVo (AT&T) | TCD130040 |
| 140 | TiVo | TCD140060 |
| 151 | Hughes | HDVR2 |
| 230 | TiVo (AT&T) | TCD230040 |
| 240 | TiVo | TCD240040, TCD24004A, TCD240080, TCD24008A |
| 264 | Toshiba | SD-H400 |
| 275 | Pioneer | 810H, 57H |
| 301 | Philips | DSR704, DSR708 |
| 321 | RCA | DVR40 |
| 351 | Hughes | SD-DVR40, SD-DVR120 |
| 381 | Samsung | SIR-S4120R |
*These units shipped variously with one or two drives. If you are looking to add one drive to your unit, you need to make sure that you only have one drive in the unit to begin with.