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Seagate 250 GB Momentus 5400.4 SATA Notebook Hard Drive Review Rev. 1.1
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Seagate 250 GB Momentus 5400.4 SATA Notebook Hard Drive

The Momentus 5400.4 is Seagate's second notebook hard drive to feature perpendicular magnetic recording (PMR) technology. By magnetizing the data bits perpendicularly to the plane of the platter, it allows a higher areal density than what was previously possible with the traditional method of longitudinal recording.

By increasing the areal density, Seagate was able to greatly improve the transfer rate and performance of the Momentus 5400.4. The Seagate Momentus 5400.4 also boasts the following features :

  • SATA 3Gb/s interface with Native Command Queuing, the fastest interface option available today, to enhance system performance levels
  • Sustained data rate: 806 Mb/s
  • Power:
    • Seek: 2.0 watts
    • Read: 2.0 watts
    • Write: 1.6 watts
  • 8-MB cache
  • 56 percent areal density increase from previous product generation
  • Robust design and high shock tolerance enable mobility in rugged operating environments.
  • 325 Gs of operating shock tolerance and 900 Gs of nonoperating shock tolerance make the drive ideal for notebook PCs and industrial applications.

Let's find out just how fast the Seagate Momentus 5400.4 goes!

For more details, read our Comprehensive Review!


• NA

Lowest PriceGrabber Price


Comprehensive Review


• ST9250827AS

Formatted Capacity

• 250,059 MB

Guaranteed Sectors

• 488,397,168

Bytes Per Sector

• 512 bytes

Sectors Per Track

• 63


• 16,383


• 2 Platters

Read/Write Heads

• 4 Read/Write Heads

Recording Method

• Perpendicular


• 1 : 1

Spindle Speed

• 5,400 RPM

Cache Buffer


Internal Data Transfer Rate

• 58 MB/s (sustained)

Maximum I/O Transfer Rate

• 3.0 Gbits/s

Average Seek

• 12.0 ms (read)
• 14.0 ms (write)

Average Latency

• 5.6 ms

Drive Ready Time

• 14.5 seconds (average)


• Serial ATA 3.0Gb/s

Supported SATA Data Transfer Mode

• 3.0 Gbits/s
• 1.5 Gbits/s

SATA Hotplug Capability

• Yes

Maximum Height

• 9.5 mm (0.374 inches)

Maximum Width

• 69.85 mm (2.75 inches)

Maximum Length

• 100.5 mm (3.957 inches)

Maximum Weight

• 102 g (0.225 lbs)

Power Requirements

• +5V DC ± 5 %

Power Consumption

• 2.0 W (Read)
• 1.6 W (Write)
• 2.0 W (Seek)
• 0.6 W (Idle)
• 0.2 W (Standby)

Ambient Temperature

• 0 °C to 60 °C (Operating)
• -40 °C to 70 °C (Non-Operating)

Maximum Shock

• 325 G @ 2 ms (Read/Write)
• 900 G @ 1 ms (Non-Operating)

Drive Acoustics

• 24 dBA average (Idle Mode)
• 26 dBA average (Performance Seek Mode)

Non-Recoverable Read Errors

• 1 error per 1014 bits read

Load/Unload Cycles

• 600,000 (minimum)


• NA


• 5 Years Limited Warranty (OEM or Retail)


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This new review system is designed to allow you to quickly receive information on the latest hardware. This new system also allows you to quickly get the gist of the review without reading through it. This can be very useful, especially in situations where you need to make a quick purchase decision.

In this new system, we start with a Product Overview whenever a company sends us a press release about their latest product. We shift through extraneous PR-talk to create a straightforward summary of the product's features as well as its specifications. This allows you to quickly find out all the pertinent details about the product, without reading through official press releases.

When we receive the product for review, we will quickly take photos of it and create a Pictorial Review. The purpose of a pictorial review is to allow you, the reader, to quickly examine the product visually. It may help you make better purchase decisions, especially if you cannot wait for the full review.

After thorough testing, we will post a Comprehensive Review of the product. This adds on to the pictorial review with comprehensive test results and our final conclusion on the product.

But no matter whether you are reading a Pictorial Review or a Comprehensive Review, you can always read the summary of the review as well as examine the product's specifications right on the first page. In all our new reviews, we will maintain the first page as a Product Overview page. If the product is listed in PriceGrabber, you can also check out the lowest price online.

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