Crucial m4 256GB CT256M4SSD2 SATA3 SSD Review

Crucial supplies the m4 2.5″ SSD with a short installation guide well padded in a hinged box.

Here is a picture of the Crucial m4 SSD:

The following picture shows the front of the 2.5″ Crucial m4 256GB SSD, where one can see the SATA3 connections for data and power on the left side. These connections are identical to conventional SATA3 hard disks and this SATA3 SSD can also operate with a slower speed at an SATA2 interface:

On the flipside one can see the label of the manufacturer Micron with the Crucial CT256M4SSD2 m4 256GB SSD instead of their brand Crucial. Micron call this SSD Micron RealSSD MTFDDAC256MAM-1K C400 256GB SSD:

Here you can see a picture of the 8-Channel Marvell 88SS9174-BLD2 Controller ICs and the four of altogether eight 25nm Micron NAND components of the SATA3 SSD with 256GB capacity, whereby the 256MB DDR3 cache can be found on the back side:

That is contained …

Manufacturer Crucial
Article number CT256M4SSD2
Capacity 256GB
Interface SATA3 6GB/s
Cache 128MB
Controller Marvell
Flash Type MLC – Multi-Level-Cell
Size 2.5″ (100.5 x 69,85 x 9,50mm)
Weight 75 gramm
Speed Read up to 415 MB/s / Write up to 260 MB/s
Seek Time
Power Consumption 0,085 Watt idle / 0,160 Watt average in operation
MTBF 1.2 million hours
Other TRIM support, RAID support, SMART support

Here is a Snipping screenshot of the CrystalDiskInfo 3.5.3 SSD and HDD information software:

SSD firmware update …

At review date, the company Crucial offered the firmware version 0002 for Marvell based m4 SSDs, which offers in comparison to the FW0001 version a higher LPM (Link Power Management) performance without pauses and hesitations with certain host systems. An update of the Crucial firmware is very easy: Download the firmware from Crucial, unpack the contained ISO file, burn it on a CD, boot with this CD, select the SSD in the firmware update utility and confirm the firmware update several times. We have updated the m4 SSD for our review to the latest Firmware FW0002 version.