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Item#: N82E16820148798

Crucial M550 CT256M550SSD4 M.2 Type 2280 256GB SATA 6Gb/s MLC Internal Solid State Drive (SSD)

  • M.2 Type 2280
  • 256GB
  • SATA 6Gb/s
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Learn more about the Crucial CT256M550SSD4

General

Brand
Crucial
Series
M550
Model
CT256M550SSD4
Device Type
Internal Solid State Drive (SSD)
Used For
Consumer

Physical

Form Factor
M.2 Type 2280
Capacity
256GB
Memory Components
MLC
Interface
SATA 6Gb/s

Performance

Max Sequential Read
Up to 550 MBps
Max Sequential Write
Up to 500 MB/s
4KB Random Read
Up to 90,000 IOPS
4KB Random Write
Up to 80,000 IOPS
MTBF
1,500,000 hours

Features

Features
Load files and programs almost instantly

Boot up almost immediately

Accelerate demanding applications

Download massive files in seconds rather than minutes

Manage power so your battery lasts longer

Encrypt and protect personal data against loss or theft

Achieve top speeds without sacrificing reliability

Native Write Acceleration

Redundant Array of Independent NAND (RAIN)

Multistep Data Integrity Algorithm

Adaptive Thermal Protection

Power Loss Protection

Data Path Protection

Active Garbage Collection

TRIM support

Self Monitoring and Reporting Technology (SMART)

Error Correction Code (ECC)

Device Sleep support

Environmental

Operating Temperature
0°C ~ +70°C

Package Content

Package Content
Crucial M550 solid state drive
Mounting screws

Quick Info

Warranty

  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years


Customer Reviews of the Crucial CT256M550SSD4

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Showing 7 of 7 reviews - Clear Filters

  • Jay B.
  • 9/10/2014 7:51:50 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsWas skeptical..not anymore

This review is from: Crucial M550 CT256M550SSD4 M.2 Type 2280 256GB SATA 6Gb/s MLC Internal Solid State Drive (SSD)

Pros: Crazy fast
Eazy to install

Cons: Nothing yet!

Other Thoughts: I build a new machine with a ASRock Extreme 4 board and I didn't have to do a thing for drive to work. Put on on the board, booted up and installed windows. Checked performance it its just nuts. I did not have to diable anything or do any bios updates or anything. Runs like a champ. Should have purchased the 512 though....oh well.

1 out of 1 people found this review helpful. Did you? Yes No

  • Daniel W.
  • 9/9/2014 2:28:55 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsWORKS buts needs Adjustments

This review is from: Crucial M550 CT256M550SSD4 M.2 Type 2280 256GB SATA 6Gb/s MLC Internal Solid State Drive (SSD)

Pros: This new drive form factor is an in expensive alternative to a traditional SSD and is very fast

Cons: There is a serious Driver issue that requires a fix outlined below.
After trying to get Gigabyte support to resolve, I spoke with support at Crucial and found they really had no clue as to why this was happening. During the discussion, they provided a few links to suggest fixes ranging from adjusting the HIPM & DIPM to tweaking the registry.
Working through these I found what the ROOT CAUSE is and how to fix the problem. Here is a summary of the cause and how to fix.
The real issue is the Intel SATA Chipset requires and iaStor drivers. The iaStor drivers were changed a few revs back to include Load Protection Modules (LPM) where the drivers try to manage faults in low loads at the Power Supply Unit (PSU) level. This change introduced a flaw in how the PSU handles power to SSD and Spindle drives to prevent too low of power being fed to these devices. The change did not take into account the M.2 format.
A Traditional SSD has a slow bleed capacitor to maintain its operation and the normal mechanical drive can simply shut down without issue. The M.2 format does not appear to have the SSD slow bleed capacitor and therein is the problem.
The iaStor driver’s simply cut power at the PSU under LPM, which causes the M.2 format drive to simply disappear in BIOS, thus the need to power down the PSU to rediscover the M.2 drive. This may be Crucial or in my case Gigabyte issue but I suspect it’s the iaStor driver only since this is happening across a wide range of motherboards and may be happening with other M.2 manufacturers as well.

Let’s hope the manufacturers get this information and adjust as needed so we don’t have to perform manual adjustments going forward.

Other Thoughts: THE FIX:
Through trial and error, the issue is really very simple. The LPM in the iaStor drivers must be turned off since it is on by default. The registry entries for this don't exist for the LPM as installed by the driver. Manual registry entries are needed to turn off LPM for the specific iaStor ports supporting the M.2 drive are required to fix this problem. You won’t want to shut off all LPM ports since they are needed for the other drive form factors to function properly
Each motherboard or iaStor driver may setup its own registry entries. The default single or fresh install should be [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters]. However, my current installation has three variants (same location) iaStorA, iaStorF and iaStorV. Locate the one that includes the ‘Device’ Key and use the path in building your registry dword strings shown below replacing the "iaStor" as needed. Remember only include the ports associated with the M.2 drive, if you want to include them and have the LPM mode enable, change the dword value to “dword:00000001”.
I copied and pasted only Port 4 & 5 in to a text file named ‘LPM.reg’, for my Gigabyte MB since those are the ports supporting the M.2 drive. Once you have the file created, double click on it to load the registry entries via RegEdit. If the path is good, you will see a message the keys were successfully loaded. If the path is not valid, an error message will ask if you what to create them – say no and correct the path in the file.

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port0]
"LPM"=dword:00000000
"LPMDSTATE"=dword:00000000
"DIPM"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port1]
"LPM"=dword:00000000
"LPMDSTATE"=dword:00000000
"DIPM"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port2]
"LPM"=dword:00000000
"LPMDSTATE"=dword:00000000
"DIPM"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port3]
"LPM"=dword:00000000
"LPMDSTATE"=dword:00000000
"DIPM"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port4]
"LPM"=dword:00000000
"LPMDSTATE"=dword:00000000
"DIPM"=dword:00000000


[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port5]
"LPM"=dword:00000000
"LPMDSTATE"=dword:00000000
"DIPM"=dword:00000000

1 out of 1 people found this review helpful. Did you? Yes No

  • Anonymous
  • 7/24/2014 8:33:20 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsVery Quick

This review is from: Crucial M550 CT256M550SSD4 M.2 Type 2280 256GB SATA 6Gb/s MLC Internal Solid State Drive (SSD)

Pros: Super fast, easy to install. Boots almost immediately.

Cons: None

Other Thoughts: Quit looking and just buy it!

Did you find this review helpful? Yes No

  • Martin C.
  • 7/15/2014 9:15:53 PM
  • Tech Level: High
  • Ownership: less than 1 day
  • Verified Owner

4 out of 5 eggsVerify your M.2 Interface

This review is from: Crucial M550 CT256M550SSD4 M.2 Type 2280 256GB SATA 6Gb/s MLC Internal Solid State Drive (SSD)

Pros: I'm not going to ding the adapter for a mistake I made. I'm sure it's a fine SSD but make sure you read your motherboards specs before buying.

Cons: M.2 SSD drive interfaces come in 2 basic styles -- the more common SATA and the lessor but often faster PCIe. I ordered this for my new HP 800 G1 Mini. When I booted and found that the SSD was not recognized -- that's when I looked closer and realized that not all 22x80mm cards are alike -- this is a SATA SSD and the M.2 SSD interface in my HP is PCIe. I need something like the Plexor M6e M.2 SSD (PX-G256M6e).

1 out of 1 people found this review helpful. Did you? Yes No

  • Scott S.
  • 7/14/2014 6:32:57 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsWorks Good

This review is from: Crucial M550 CT256M550SSD4 M.2 Type 2280 256GB SATA 6Gb/s MLC Internal Solid State Drive (SSD)

Pros: Problem-free installation. Comparable performance to other SSDs that I've used.

Cons: None

Other Thoughts: Installed in an Asus Z97I-Plus with version 2103 BIOS.

1 out of 1 people found this review helpful. Did you? Yes No

  • BRIAN A.
  • 7/13/2014 4:20:22 PM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsBetter

This review is from: Crucial M550 CT256M550SSD4 M.2 Type 2280 256GB SATA 6Gb/s MLC Internal Solid State Drive (SSD)

Pros: I want to update my last review. The drive is doing a lot better now. Windows 7 will load and 8.1 boots faster now. Overall progress is better. Maybe it was just me.

Cons: None

Other Thoughts: It does work on ASRock's Fatal1ty 990FX Killer board. You will need however to disable the IDE and Sata Combined Mode to have better performance which I did not do the first time around. It does not seemed faster than my OCZ Vector 150 ssd drive.

2 out of 2 people found this review helpful. Did you? Yes No

  • BRIAN A.
  • 7/10/2014 7:40:11 AM
  • Tech Level: Average
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsWe will see

This review is from: Crucial M550 CT256M550SSD4 M.2 Type 2280 256GB SATA 6Gb/s MLC Internal Solid State Drive (SSD)

Pros: Well everything was detected by the bios and Windows 8. I did upgrade the bios from ASRock's web site before I installed it.

Cons: It seems to be really slow in booting up. Once it boots up it seems to be somewhat okay. If I restart again it takes forever. Maybe there's something I haven't done yet to make it work right. Been checking, so not sure what it is.
Couldn't get Windows 7 to install on it. It just sat there.

Other Thoughts: I have a Fatal1ty 990FX Killer Motherboard
32 GB GSkill memory
Any help to make it boot and work better would be awesome.+
Will do an update later.

0 out of 1 people found this review helpful. Did you? Yes No

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