Crucial® m4 SSD 2.5” Technical Specifications
Continuing the tradition of our award-winning solid-state drives, the Crucial m4 offers mobile and desktop users scorching-
fast read and write speeds. Low power, lightweight, and durable, it empowers high-speed synchronous MLC NAND, advanced
controller technology, optimized NAND management, and the SATA 6Gb/s interface. Together, that technology dramatically
improves data transfers for bandwidth-demanding applications.
Our products are built on decades of design and manufacturing expertise. It is our expertise in NAND technology that enables
us to optimize the performance and endurance necessary to build quality solid-state storage devices.
Crucial m4 SSD 2.5” CT064M4SSD2 CT128M4SSD2 CT256M4SSD2 CT512M4SSD2
Features
Capacity* (Unformatted) 64GB* 128GB* 256GB* 512GB*
NAND Micron® MLC Micron® MLC Micron® MLC Micron® MLC
Controller Integrated 8-channel single chip Integrated 8-channel single chip Integrated 8-channel single chip Integrated 8-channel single chip
Firmware Field Upgradeable Field Upgradeable Field Upgradeable Field Upgradeable
RAID Support Yes Yes Yes Yes
Interface SATA SATA SATA SATA
Transfer Rate 6Gb/sec (compatible 3Gb/sec) 6Gb/sec (compatible 3Gb/sec) 6Gb/sec (compatible 3Gb/sec) 6Gb/sec (compatible 3Gb/sec)
2.5-inch SSD Power Supply 5 V 5 V 5 V 5 V
Certifications FCC, CE, RoHS, UL FCC, CE, RoHS, UL FCC, CE, RoHS, UL FCC, CE, RoHS, UL
Command Set ATA-8 ACS2 command set compliant ATA-8 ACS2 command set compliant ATA-8 ACS2 command set compliant ATA-8 ACS2 command set compliant
Monitoring Self-monitoring, analysis, and
reporting technology (SMART)
command set
Self-monitoring, analysis, and
reporting technology (SMART)
command set
Self-monitoring, analysis, and
reporting technology (SMART)
command set
Self-monitoring, analysis, and
reporting technology (SMART)
command set
Performance1
Average Access Time < .1 ms < .1 ms < .1 ms < .1 ms
Sequential Read (up to)415 MB/sec (SATA 6Gb/s) 415 MB/sec (SATA 6Gb/s) 415 MB/sec (SATA 6Gb/s) 415 MB/sec (SATA 6Gb/s)
Sequential Write (up to) 95 MB/sec (SATA 6Gb/s) 175 MB/sec (SATA 6Gb/s) 260 MB/sec (SATA 6Gb/s) 260 MB/sec (SATA 6Gb/s)
Random 4k READ 40,000 IOPS 40,000 IOPS 40,000 IOPS 40,000 IOPS
Random 4k WRITE 20,000 IOPS 35,000 IOPS 50,000 IOPS 50,000 IOPS
PCMark® Vantage 55K HDD test score 55K HDD test score 65K HDD test score 65K HDD test score
Physical
2.5-inch SSD dimensions
(L x W x H)
100.5 x 69.85 x 9.50 mm 100.5 x 69.85 x 9.50 mm 100.5 x 69.85 x 9.50 mm 100.5 x 69.85 x 9.50 mm
2.5-inch SSD weight 75g 75g 75g 75g
Environmental
Active Average Power 150 mW 150 mW 160 mW 280 mW
Idle Average Power <65 mW <85 mW <85 mW <100 mW
Operating Temperature 0°C to 70°C 0°C to 70°C 0°C to 70°C 0°C to 70°C
Non-Operating Temperature -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C
Shock Resistance 1500G / 1.0ms 1500G / 1.0ms 1500G / 1.0ms 1500G / 1.0ms
Vibration Resistance 2-500Hz at 3.1G 2-500Hz at 3.1G 2-500Hz at 3.1G 2-500Hz at 3.1G
Reliability
MTBF21.2 Million Hours 1.2 Million Hours 1.2 Million Hours 1.2 Million Hours
Data Reliability Built-in EDC/ECC Built-in EDC/ECC Built-in EDC/ECC Built-in EDC/ECC
Drive Endurance 36TB=20GB per day for 5 years 72TB=40GB per day for 5 years 72TB=40GB per day for 5 years 72TB=40GB per day for 5 years
Warranty Limited 3 Year Warranty Limited 3 Year Warranty Limited 3 Year Warranty Limited 3 Year Warranty
*Some of the listed storage capacity is used for formatting and other purposes and is not available for data storage. 1GB equals 1 billion bytes.
1Typical I/O performance numbers as measured using Iometer with a queue depth of 32 and write cache enabled. Iometer measurements are performed on a 8GB span. 4k transfers used for Read/Write
latency values. System variations may affect measured results.
2Sequential READ/WRITE speeds are Iometer HDD test suite scores.
©2011 Lexar Media, Inc. All rights reserved. Information is subject to change without notice. Crucial and the Crucial logo are trademarks of Micron
Technology, Inc. All other trademarks and service marks are property of their respective owners. Lexar Media, Inc. is a division of Micron Technology,
Inc., and Lexar Media is a division of Micron Europe Limited, a division of Micron Semiconductor Asia Pte. Ltd., and a division of Micron Japan, Ltd.
revision: 03/11/2011
Crucial m4 SSD 2.5-inch Mechanical Drawings
Pin Configurations
Signal Segment Pin Assignments
SIGNAL NAME TYPE DESCRIPTION
S1 GND Ground
S2 A Differential signal pair A
and A#
S3 A#
S4 GND Ground
S5 B# Differential signal pair B
and B#
S6 B
S7 GND Ground
Power Segment Pin Assignments
SIGNAL NAME TYPE DESCRIPTION
P1 V33 No connect
P2 V33 No connect
P3 V33 No connect
P4 GND Ground
P5 GND Ground
P6 GND Ground
P7 V5 5V power, pre-charge
P8 V5 5V power
P9 V5 5V power
P10 GND Ground
P11 DAS Device activity signal
P12 GND Ground
P13 V12 No connect
P14 V12 No connect
P15 V12 No connect
