BLR-1 is Iron Mountain’s Bengaluru presence: an 80,000 square foot facility at Pattandur Agrahara in Whitefield with 4 MW of IT load — 20,000 sq ft per megawatt, about 50 watts per square foot. It is a small, well-connected building in Bengaluru’s oldest technology cluster, and it is additive: those 4 MW are counted. The number that matters is what sits around it. Karnataka counts 90.7 MW in this registry and BLR-1 is 4.4% of the state. A single unbuilt NTT building at Devanahalli, 40 kilometres north, is 67.2 MW — 16.8 times this facility, and 74% of the entire state’s counted capacity.
1At a glance
2Four megawatts against sixty-seven point two
| Record | MW | Scope | Share of 90.7 MW |
|---|---|---|---|
| NTT Bengaluru 4, Devanahalli (PRJ-172) | 67.2 | Non-additive, unbuilt, 8.5 acres | 74% — excluded from the count |
| NTT Bengaluru 3 (PRJ-171) | 12.0 | Operating, additive | 13.2% |
| NTT Bengaluru 2 (PRJ-170) | 4.5 | Operating, additive | 5.0% |
| Iron Mountain BLR-1 (this record) | 4.0 | Operating, additive | 4.4% |
| Remainder across Karnataka | ~2.0 | Smaller operating records | 2.2% |
| Karnataka counted total | 90.7 | Additive rows only | 100% |
Karnataka’s 90.7 MW is made almost entirely of NTT Bengaluru 3 at 12 MW and NTT Bengaluru 2 at 4.5 MW. Everything else — including a global REIT — is under five megawatts.
Meanwhile 67.2 MW at Devanahalli is excluded because it is a single unbuilt building with a completion claim. That exclusion is correct and it means Karnataka’s counted 90.7 MW is 1.35 times one unbuilt building.
That ratio is the honest description of Karnataka. It is not a market with 90.7 MW of capacity; it is a market with about 23 MW of counted operating capacity and a 67 MW bet on Devanahalli.
The arithmetic: additive, operating capacity in Karnataka is 90.7 MW. Excluding the operating NTT records of 16.5 MW leaves roughly 2 MW spread across the rest — and BLR-1 at 4 MW is the largest of those. A global data centre REIT holds 4.4% of Karnataka.
3Whitefield and Devanahalli are not the same market
Bengaluru’s data centre capacity has been moving north for five years, and the two ends of that movement are 40 kilometres apart with different power, land and customer bases.
| Whitefield — where BLR-1 sits | Devanahalli — where the growth is | Difference | |
|---|---|---|---|
| Position | East Bengaluru, the original IT belt | North, around the airport | 40 km apart |
| Anchor | ITPL, enterprise campuses, existing fibre | Kempegowda airport, greenfield land | Different demand |
| Build type | Single-building colocation | Multi-building hyperscale campuses | Different product |
| Power | City distribution, constrained | 220 kV GIS at Bengaluru 4 | Only the north can host 67 MW |
| Land | Built over, expensive, no assembly | 8.5 to 18 acres available | The reason for the move |
| Largest record here | BLR-1 at 4 MW | NTT Bengaluru 4 at 67.2 MW | 16.8× |
| Precedent | — | Prestige Tech Cloud, Devanahalli | Corporate land, not colocation land |
The lesson for anyone valuing a Bengaluru asset: a megawatt in Whitefield is not a megawatt in Devanahalli. Whitefield sells interconnection and proximity to enterprise tenants at low density — 50 watts per square foot. Devanahalli sells 67.2 MW to hyperscalers at 22.4 MW per building.
The registry records both because both are real, and it never sums them into a single “Bengaluru capacity” figure without saying which is which.
4Procurement
5Limits and open questions
- 4 MW is IT load as published. Facility load is not stated.
- No site area is published for BLR-1, so no MW-per-acre figure exists for it.
- 80,000 sq ft is a whole-building figure, so 50 W per sq ft understates hall density.
- Karnataka’s 90.7 MW depends on which NTT records are additive. Bengaluru 4’s 67.2 MW is correctly excluded and dominates any discussion of the state.
- “About 2 MW of remainder” is derived by subtracting the three larger records from 90.7 and is labelled as derived.
- The Whitefield to Devanahalli migration is an interpretation of the record set, not an operator statement.
- What would close it. A site area and an expansion plan for BLR-1.
6Sources
Sources: the Iron Mountain Bengaluru location page; the Iron Mountain Data Centers India platform page; the Web Werks Bengaluru facility page; and Data Center Dynamics coverage of the NTT Devanahalli campus.