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Early 2011 model, A1278 / 2.3 GHz i5 or 2.7 GHz i7 processor.

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Upgrade to a 1TB 7200 RPM SATA III 32MB?

Can I upgrade this computer with a HGST Travelstar 7K1000 2.5-Inch 1TB 7200 RPM SATA III 32MB Cache Internal Hard Drive (0J22423)?

I have the 2.7 GHz model.

Would this affect my battery performance?

1.0TB HGST Travelstar™ 7K1000 Specifications:


Form Factor :2.5″ HDD

Interface: SATA 6.0Gb/s (3Gb/s firmware enabled4)

Capacity1: 1000GB

Formatted Capacity2 :930GiB

Rotational Speed :7,200 RPM

Cache / Data Buffer :32MB

Manufacturer Model Number :HTS721010A9E630


Height (max): 9.5mm (0.370″)

Width (max): 69.85mm (2.750″)

Length (max): 100.35mm (3.951″)

Weight (typical): 95g (0.209 lbs.)

Bytes per Sector: 512

Areal Density: 676Gb/in2


Contact Start-Stops: 600,000

Warranty: 3 Year HGST Warranty (for replacement with standard 6Gb/s firmware). 3 Year OWC Warranty (for replacement with 3Gb/s firmware enabled)


Transfer Rate (Max): 600MB/s

Track-to-track Seek: 1.0ms

Average Seek Time: 13.0ms

Average Latency: 4.2ms


Maximum Start Current, DC: 5.5 Watts

Seek Power: 2.1 Watts

Read Power: 1.8 Watts

Write Power: 1.8 Watts

Idle Mode: 1.7 Watts

Idle Mode, Active: 1.0 Watts

Idle Mode, Low Power: 0.8 Watts

Standby Mode: 0.2 Watts

Sleep Mode: 0.1 Watts

If not, then which HDD would you recomend?

Thank for your help!

Enrique L.

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Yes it will fit and work - might shorten your battery life though.

If this answer is acceptable please remember to return and mark it.

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