Release Date: 04/11/2012
Firmware for the m4 SSD is being updated from version 0309 to 000F. The m4 is updatable to this new firmware starting from versions 0001, 0002, 0009, or 0309 in a single step. If updating from an early version directly to 000F, all interim improvements will also be included (please see Release Notes for version 0002, 0009 and 0309 for details).
Changes between version 0309 and 000F include the following changes: •Improved compatibility with certain SAS expanders and peripheral RAID cards.
•Improved throughput stability under extremely heavy workloads.
•Improved data protection in the event of unexpected, asynchronous power loss.
This firmware update is recommended for all drives currently in the field if the end user is experiencing any of these symptoms.
http://www.crucial.com/support/firmware.aspx
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Crucial m4 SSD Firmware 0309
Release Date: 01/13/2012
Change Log:
* Changes made in version 0002 (m4 can be updated to revision 0309 directly from either revision 0001, 0002, or 0009)
* Correct a condition where an incorrect response to a SMART counter will cause the m4 drive to become unresponsive after 5184 hours of Power-on time. The drive will recover after a power cycle, however, this failure will repeat once per hour after reaching this point. The condition will allow the end user to successfully update firmware, and poses no risk to user or system data stored on the drive.
This firmware update is STRONGLY RECOMMENDED for drives in the field. Although the failure mode due to the SMART Power On Hours counter poses no risk to saved user data, the failure mode can become repetitive, and pose a nuisance to the end user. If the end user has not yet observed this failure mode, this update is required to prevent it from happening.
If you are using a SAS Expander please do not download this Firmware. As soon as we have a Firmware Update that will work in these applications we will release it.
Crucial M4 0309官方韌體下載連結：http://www.crucial.com/support/firmware.aspx
修正當機Bug
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Release Date: 08/25/2011
Change Log:
•Changes made in version 0002 (m4 can be updated to revision 0009 directly from either revision 0001 or 0002)
•Improved throughput performance.
•Increase in PCMark Vantage benchmark score, resulting in improved user experience in most operating systems.
•Improved write latency for better performance under heavy write workloads.
•Faster boot up times.
•Improved compatibility with latest chipsets.
•Compensation for SATA speed negotiation issues between some SATA-II chipsets and the SATA-III device.
•Improvement for intermittent failures in cold boot up related to some specific host systems.
官方韌體下載網址:http://www.crucial.com/support/firmware.aspx
手邊有Crucial M4 SSD的用家可以更新囉
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小測了一下先前入手的Crucial M4 SSD 256GB
（前鎮子的開箱文：【分享】美光 crucial M4 SSD 256GB）
系統平台：
intel i7 2600k
ASUS MAXIMUS IV EXTREME
ASUS GTX580 DCII
創見 Transcend DDR3 4GB 1333Mhz (hynix 顆粒) x 4
ASUS Xonar Essence STX
Windows 7 64bit 、ACHI開啟、SATA 6Gb/s（P67內建）模式下
韌體0002測試數據
韌體0009測試數據
目前使用上一切正常
以上，感謝收看
P.S: 更新方法除了燒錄成光碟片後採用光碟開機更新外
也可參考ayubabao大的教學 美光Crucial M4 韌體更新教學[0001-0002]
使用USB隨身碟開機並且更新，非常實用的好方法
