На момент написания этой статьи его можно признать морально устаревшим, ведь на рынке уже есть твердотельные накопители с контроллером Marvell 88SS Впрочем, использование старого контроллера полностью оправдано тем, что этот накопитель был представлен в середине года. Точная версия интерфейса не указана, хотя в этом нет ничего удивительного: в последнее время так делают многие производители SSD. Количество NAND-устройств, находящихся в каждой микросхеме памяти, также не известно. В паре с контроллером работает кеш-память DDR3 объёмом Мбайт.
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The case is very simple, with a metallic gray paint covering a metal alloy body. Our review model included branding from both Micron and Crucial, with the top cover aimed at the consumer market and the bottom cover showing what OEMs would receive. The multi-use case can be setup in both 9. With shorter screws the drive can be instantly converted to handle different mounting configurations.
The 2. The front of the Crucial m4 offers the industry-standard SATA power and data connection, with no service pins exposed for firmware flashing modes. Disassembly The GB Crucial m4 is very easy to take apart after removing four Phillips head screws from the top of the drive. With the screws taken out, the top cover lifts off, allowing you to remove the shim and carefully lift out the circuit board.
Its legacy 3. It was interesting to see little change and a drop when looking at the 4K random transfer speeds at a queue depth of 1 on the m4 compared to the older C The older C measured Expanding the 4K read and write tests out to a queue depth of 64 showed slightly different behavior. The C still maintained a clear advantage in read speeds, but the m4 was able to pick up the slack as it turned to write speeds. The one noted change though were the slightly higher recorded random 4K write speeds.
Looking at our server profile tests the Crucial m4 still lagged behind the C in every scenario. Performance was comparable between the m4 and Intel SSD , with each drive playing leapfrog between tests. One interesting performance trait of both the C and m4 on the database benchmark is they both sharply drop off between the 32 and 64 queue depth mark.
Real-World Benchmarks If you are a first time visitor on StorageReview, one thing we try to focus on is how any given drive might perform under real-world conditions. For the average user, trying to translate high random 4K write speeds into an everyday situation is pretty difficult. To really see how drives perform under normal work-loads you need to record the exact traffic being passed to and from the device, and then use that to compare drives against one another. For this reason we turned to our StorageMark traces, which include HTPC, Productivity, and Gaming scenarios to help our readers find out how well a drive might perform under their conditions.
Before continue with our real-world benchmarks, one area we need to address surrounds our Productivity trace.
In the past most SSDs have charged through this trace providing valuable and worthwhile information, although that is heavily dependent on how the drive can cache byte aligned information. On the Crucial m4, Micron made changes to the firmware to put more emphasis on 4K-aware operating systems, dropping support for legacy systems with the goal of improving 4K-aligned performance.
The result is much slower performance on legacy systems and slower numbers in our Productivity trace. We are transitioning to a newer 4K-aligned trace in this category soon, to go along with our HTPC and Gaming traces for newer drives.
The first real-life test is our HTPC scenario. In this trace we recorded 2,MB being written to the drive and 1,MB being read. As we mentioned above, performance in this non-4K optimized dropped well below the performance of other SSDs, including the C Luckily for most buyers of the m4, using it with Windows 7 or other 4K-aware operating systems will put it in an optimal setting where it can perform much better than in this trace.
The downside is buyers who still use Windows XP or Vista will see far worse performance on the m4 than if they used a different model Our second real-life test covers disk activity in a productivity scenario.
For all intents and purposes this test shows drive performance under normal daily activity for most users. This test includes: a three hour period operating in an office productivity environment with bit Vista running Outlook connected to an Exchange server, web browsing using Chrome and IE8, editing files within Office , viewing PDFs in Adobe Reader, and an hour of local music playback with two hours of additional online music via Pandora.
In this trace we recorded 4,MB being written to the drive and 2,MB being read. Our third real-life test covers disk activity in a gaming environment.
The trace captures the heavy read activity of each game loading from the start, as well as textures as the game progresses. In this trace we recorded MB being written to the drive and 7,MB being read. We found the m4 to lower its power consumption in every category except sequential read, which was only a hair above the C We measured 2. Warranty Crucial stands behind the GB m4 with an industry-standard three year warranty. They also claim that the m4 is good for a total of 72TB of total data written to the drive over its lifespan.
This translates out to roughly 40GB of data written to the drive per day over the expected 5-year lifespan. Overall the m4 is a nice progressive upgrade over the C with the exception of legacy byte alignment performance. Micron also gets a nod for using largely home grown parts, except the controller, which generally means consumers can expect a tightly integrated SSD with little chance for internal compatibility issues. Micron even develops the firmware in-house, giving them a leg up when it comes to tweaking they way they want and offering a path for continued development in a timely manner.
Маленькие и полезные. Сводное тестирование mSATA SSD
Datasheet archive on 2-11-2014
SSD Crucial M4 Slim, 128 Go, SATA III