| Spec | Crucial 2.5" SSD CTFDDAC256MAG | Seagate 2.5" Hybrid Momentus XT | Samsung 3.5" HDD HD103SJ |
| Idle Power | 0.094W | 0.8W | 6.3W |
| Standby Power | 0.4W | 1.0W | |
| Spin Up Power | 1.0A | 2.2A | |
| Read Power | 2.1W | 2.4W | 7.2W |
| Write Power | 4.3W | 2.3W | 7.2W |
| Avg Seek Power | 2.2W | 6.7W | |
| Avg Operating Power | 1.1W | ||
| Sound Level Idle | 0dB | 23dB | 27dB |
| Sound Leel Seek | 0dB | 26dB | 29dB |
| Operating Shock | 1500G | 350G | 300G |
| NR Error Rate | 1 sector in 10^14 bits | 1 sector in 10^15 bits | |
| Avg Access Time | Under 0.1ms | ||
| Avg Latency | 4.17ms | 4.14ms | |
| Avg Seek Time | 11ms | 8.90ms | |
| Random Read Seek | 11ms | ||
| Random Write Seek | 13ms | ||
| Sequential Read (Max) | 355MB/sec (6Gb/s) 265MB/sec (3Gb/s) | ||
| Sequential Write (Max) | 215MB/sec (6Gb/s) 215MB/sec (3Gb/s) | ||
| To Host Rate (Max) | 300MB/s | 300MB/s | |
| To Media Rate (Max) | 123MB/s | 250MB/s |
Regards,
The Outspoken Wookie
4 comments:
I have a momentus XT and it does not rate any more that 5.9 on the index... The driver is a big dissapointment. I now have a standard Momentus and it is the same speed. I put this down to a number of factors...
1. Does not support NCQ (at least not very well)
2. The Flash usage is auto-magic meaning if you use a virtual machine your driver could be optimising for you virtual computers not your host computer.
3. Its only 4gb flash...
I wish it was better... but the standard moments seems to be just as good...
I wouldn't expect the WEI to be affected at all by the 4GB of SLC cache in the Momentus XT. I *would* expect that with regular use, the Momentus XT would be faster than a Momentus.
Massive differences in performance are not going to be obtained with these first version hybrid hard drives, maybe if there's a few hundred GB of SLC, that would help, but not just a few GB.
I do know that my XPS15 with a Momentus XT feels snappy, however I'd need to perform *IDENTICAL* operations on 2 different XPS15 units - one with a regular 7200rpm 2.5" HDD and one with a Momentus XT - to be able to give any truly meaningful comparisons, but I have more important things in my life than doing that! ;)
The windows experience index for the hybrid drives is not accurate. 5.9 is lower than it should score. Although a hybrid, it is still predominantly an HDD rather than an SDD. The Windows experience index rating does not account for this 'inbetween' technology. That being said, it would still not score as high as a decent SDD.
Yes, Anonymous, I'm aware of this, however I'm simply reporting here what the Windows Experience Index results are, not making excuses for its lack of thoroughness. :)
I agree that hybrid drives offer better user experience than plain HDDs and far less than SSD.
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