转载：关于RAID--Build/Verify&Clear&Quick Init众说

1. Quick Init：产生阵列不做初始化
Clear： 向所有阵列成员写0
Build： 从原盘拷贝数据到目标盘

2. Build/Verify 是在创建RAID时创建并校验RAID信息。
Clear        是创建时清空所有数据
Quick Init   是创建时执行快速初始化

3. Build - Copies data from a source drive to a target drive. This option can be used to upgrade a single drive configuration to a RAID1 configuration.
Clear - This option creates the array and writes zeroes to all the hard drives in the array. Do not select this option if any of the selected hard drives contain unrecoverable data.
Quick Init - Creates the array without initializing or overwriting any data on the selected hard drives. This option can be used if the configuration on the HostRAID controller has been cleared or if you have known good configuration written on the hard drives. （If you chose Quick Init, the following message appears: “Creating a RAID-x using Quick Init may require you to run a VERIFY W/FIX using OS utility to make drives consistent.” ）

4.
a．  Build，创建阵列，选择这项后，系统会提示“Select Source Drive”，通过<↑↓>键选择源盘后，另外一块硬盘即为目标盘。回车后，系统提示是否继续，选择YES后继续，出现阵列build界面，建议用户等系统做完build后再进行下一步操作。

b．  Clear，初始化阵列，此操作会将硬盘上所有数据写零。阵列必须等Clear任务完成后才能使用。

c．  Quick Init，快速初始化，只对写入的数据作保护。这项功能需要在操作系统下使用管理软件进行校验工作，以保证。

5. Build Creating a RAID 1 array when you want to preserve data on an existing drive. If you select this option, you are asked to designate the source drive. The contents of the source drive are preserved and any data on the new drive is lost. Clear Creating a RAID 1 array on new drives, or when you want to be sure that the new array contains no existing data. Quick Init Creating a RAID 1 array on new drives. This is the fastest way to create a RAID 1 array.

NOTE:
• If you pause a Build or Clear process on a RAID 1 array, you can restart the process by pressing the Ctrl+R keys.
• A RAID 1 array created using the Quick Init option might return some data miscompares if you later run a consistency check. This is normal and is not a cause for concern.
• You can use drives of different sizes in a RAID 1 array. However, during a Build operation, only the smaller drive can be selected as the source drive.
• When migrating from single volume to a RAID 0 array, migrating from a larger drive to a smaller drive is allowed. However, the destination drive must have at least half the capacity of the source drive.

6. When creating a new array, you can use one of three methods.
"Quick Init" makes the drive available immediately without having to wait for a full build/verify process. It engages "full stripe write mode" with degraded performance, where parity and mirror data are written directly to the disk. Using the "Build/Verify" setting, the array is accessible right away but with degraded performance until the process is completed. The "Clear" option completes a build/verify process faster than a Build/Verify, but renders the array unusable until the process is finished. Expect to wait a couple of hours when using the Clear function to build a four-disk RAID5 from scratch.

7. 重新做raid，但是不要初始化，选择构建方式为quick init方式，这样只会重新建立raid信息，不会抹杀数据。

8. build
    优势在于可以在后台运行，磁盘阵列创建后可以立即使用，缺点是较大的磁盘阵列创建时间比较长，会影响磁盘访问性能，直至创建完成，如果您没有等到磁盘build/verify状态完成(显示为optimal)就重启系统，会发现磁盘阵列的创建又从0 开始做起，但已经做过磁盘阵列校验的容量在重启动后raid 系统会认为他已经做过了，会迅速扫描后从下面的磁盘容量继续校验，您会注意到校验进度从0迅速变化为其他更大的数字，而不是1。
   
clear
    优势在于清除掉所有磁盘上的数据速度比build要快，缺点是必须等到清除完成才可以退出，开始访问磁盘的其他操作。

quick init
    优势在于立即可用，速度快。

9. Build—For a RAID-1, the data from the primary or master drive is copied to the secondary or slave drive. For a RAID-5, correct parity is generated for the entire array. The advantages of building an array are that the array is immediately available for use, and that when the build is complete, the array operates at maximum performance. The disadvantages are that building takes some time, for a large array possibly many hours, and performance is impacted until the build completes.

■ Clear—In this case, the contents of all the drives are cleared. The advantages of clearing an array are that the process is much faster than building and when completed, the array operates at maximum performance. The disadvantage is that the array is not accessible until the clear completes.
■ Quick—In this case the array is immediately available. The advantage of quick initialization is that the array is immediately available with no on-going build. The disadvantage is that the write performance of a RAID-5 or RAID-50 initialized in this way is impacted until a Verify with fix Task is run on the array. Array
■ Verify—Performs a test of the entire array to ensure that data is consistent. Any inconsistency found is not repaired.
■ Verify with Fix—Performs a test of the entire array to ensure that data is consistent. Any inconsistency found is repaired.
■ Clear—Erases all data on the array. Any data previously on the array is not recoverable.

10. RAID 0 有两种选择：
No Init： 产生阵列不做初始化
Migrate： 从一个硬盘创建RAID 0
RAID 1 有三种选择：
Quick Init：产生阵列不做初始化
Clear： 向所有阵列成员写0
Build： 从原盘拷贝数据到目标盘

RAID 0
No Init: 提示：A member drive contains a valid partition table or boot block.
When a RAID array is created, this information will be destroyed.
Do you want to create an array?(Yes/No)

Migrate: 选择源盘
提示：WARNING: Migration may take half hour or more to complete.
Array is inaccessible until the migration is completed
Terminating before completion will result in data loss!
Do you still want to poceed? (Yes/No)

RAID1

Build： 选择源盘
提示：Building the RAID 1 may take half hour or more to complete.
Do you still want to continue? (Yes/No)
Clear: 提示：Building the RAID 1 may take half hour or more to complete.
Also, the array is not accessible until the Clearing is over
Do you still want to continue? (Yes/No)

Quick Init: 提示：Creating a RAID 1 using Quick Init may require you to run
a VERIFY W/FIX using OS utility to make drives consistent.
按任意键继续

提示：A member drive contains a valid partition table or boot block.
When a RAID array is created, this information will be destroyed.
Do you want to create an array?(Yes/No)

11. 使用「Quick Init」（快速初始化）選項進行初始化的陣列可立即使用，且沒有進行中的幕後控制器活動。所有寫入已快速初始化陣列的資料將受到保護。RAID 層級 5 和 50 寫入效能將會降低，直到在陣列上執行修正驗證後為止。

12. RAID 级别 创建方法 适合条件 RAID 0 No Init（无初始化） 在新驱动器上创建 RAID 0。

 RAID 0 Migrate（迁移）1 使用一个新驱动器和一个包含要保留的数据的驱动器创建 RAID 0。 RAID 1 Build（建立）a 只要是创建 RAID 1 时，如果一个驱动器上包含要保留的数据，该方法尤其适用。
RAID 1 Clear（清除） 在新驱动器上创建 RAID 1，或希望确保阵列在创建后没有任何数据。
RAID 1 Quick Init（快速初始化） 创建 RAID 1 最快的方法。使用新驱动器时适合使用该方法。

注意： 向阵列中添加新驱动器之前，应备份新驱动器上包含的所有数据。否则，所有数据均将丢失。
◦如果从 ACU 中停止 RAID 1 上的“Build”（建立）或“Clear”（清除）过程，可以按 <Ctrl><R> 重新开始。
◦使用“Quick Init”（快速初始化）选项创建的 RAID 1 阵列可能会返回一些数据，这些数据在以后运行“Verify”（验证）时会错误地比较。这属于正常现象，无须担心。
◦通过 ACU 可以在 RAID 1 阵列中使用不同大小的驱动器。不过，在建立操作期间，只能选择较小的驱动器作为源驱动器或第一驱动器。
◦一个物理磁盘上不能创建多个阵列。将使用驱动器的全部容量。
◦从单卷迁移到 RAID 0 时，允许从较大的驱动器向较小的驱动器迁移。不过，目标驱动器的容量必须至少为源驱动器的一半。
◦Adaptec 不建议您在 Windows 动态磁盘（卷）上迁移或建立阵列，因为这样会导致数据丢失。

注意： 不要使用“Migrate”（迁移）选项中断 RAID 0 的创建。如果中断，将无法重新开始，也无法恢复源驱动器上的数据。

•Build (the default)—Build/verify the array.
•Clear—Clear the array.
•Quick Init - Make the array available immediately.
Overall, the Build method takes longer than Clear, but it enables you to begin using the array immediately. Although faster, Clear must complete before you can begin using the array. Quick Init makes the array available immediately, but for RAID 5 write performance is impacted until a Verify with Fix is run on the array.