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Q1:
Are Advanced Format / 4K / 512e disk drives supported on LSI RAID controllers?
A1:
4K / Advanced Format drives are supported by some LSI controllers models. See the Compatibility list to see which specific models have been tested:

LSI1078 based controllers - These do not support 4K drives
LSISAS2108 based controllers - These do not support 4K drives
LSISAS2208-based - Some specific 4K drives are listed as compatible
LSISAS3108-based - Some specific 4K drives are listed as compatible

512e is supported with LSI MegaRAID LSISSAS2108-based controllers (e.g. 9260/9261/9280) starting with the MR4.8 code set release.

512e is supported with LSI MegaRAID LSISSAS2208-based controllers (e.g. 9265/9271/9285) starting with the MR5.5 code set release.

也許有一種情況是, LSISAS2108更新了f/w. 但是512e的最佳化支持, 依然可能不確定是否啟動. 最快的方式就是安裝FTS的ServerView RAID Manager來檢查對於512e支持是否有啟動...

Q2:
Sector alignment needs with MegaRAID controllers
A2:
MegaRAID controllers actually store their configuration data at the end of the drive, using the last 512MB of space on each drive. This space is used for both the configuration data necessary to ensure mapping of where the data should be written as well as something of a swap file for when a Migration is done (adding another disk or changing the RAID level of an existing array).

For this reason, no additional OS alignment considerations are needed when using LSI MegaRAID controllers. Sector 0 of each drive will be the first sector that is passed up to the OS (whether 4k, 512b, or emulated 512b from 4k).

In addition to the above, please keep in mind that only 512b sectors are supported by LSI for our MegaRAID products at this time. See the LSI compatibility list to see if 4K drives have been added to the list. Future support of 4k sectors is planned, although there is no firm date or product selection for this.
4k support在LSISAS2208之後以實作.
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舊 2015-11-13, 08:40 AM #609
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