DL20 Gen10 E-2136 1P 16G 4SFF CN-安装win2016系统在选择磁盘分区的时候提示阵列控制器s100i可能未在BIOS中启用，无法选择安装盘符
已知条件：两块SSD硬盘做了raid1；阵列卡型号s100i；F11安装win2016
问题描述：F11安装系统选择磁盘分区时报错Windows cannot be installed to this disk .Thiscomputer’s hardware may not support booting to this disk ensure that the disk’scontroller enabled in the BIOS menu.
诊断过程：
首先听到客户描述无法选择磁盘分区，第一想到尝试加载阵列卡驱动，后续客户发来报错截图如下：发现硬盘已经识别，故不需要加载阵列卡驱动。
（1）阵列已经配置，代表不是阵列卡的问题，怀疑硬盘的问题。
（2）带着客户通过BIOS恢复了出厂设置，之后发现阵列配置界面识别不到阵列卡了，回到BIOS界面，选择s100i发现已经是AHCI的模式，更改为SW-raid之后能正常配置阵列，但是配置结束之后故障依旧。
（3）后续测试客户反馈AHCI模式时有发现有一块磁盘offline，考虑是否是磁盘掉线，
（4）通过相关报错提示在官网搜索无果，谷歌之后查询到如下结果。
（5）微软给出的解决方案，有提到更改阵列模式，客户更改为AHCI也确实能安装，但是客户业务限制只能是阵列模式，因此不接受。
（6）后续联系了客户，更换了系统镜像，问题解决。
如下链接是根据报错提示得到的结果：
https://support.microsoft.com/en-us/help/2345135/setup-reports-error-windows-cannot-be-installed-to-this-disk-when-boot
Setup reports error “Windows cannot be installed to this disk…" when booted from DVD
谷歌解决方法：
Error 4: Windows Cannot Be Installed to This Disk. This Computer’s Hardware May not Support Booting to This Disk.
Another error message you may receive during Windows installation is:
"Windows cannot be installed to this disk. This computer’s hardware may not support booting to this disk. Ensure the disk’s controller is enabled in the computer’s BIOS menu."
报错原因：
Generally speaking, there are 2 possible reasons:
（1）Hard disk protection is enabled.
SATA Controller modewas set incorrectly (with incorrect drive mode, the very disk cannot be used normally).
Solution 1. Remove Hard Disk Protection
For the first situation, please read the specification or contact sales person to confirm whether there is hard disk protection if the computer is not configured by ourselves. If there is, remove the protection by following instructions.
（2）Solution 2. Change SATA Controller Mode
Fo2r the second situation, if we changed SATA Controller mode in BIOS before, try setting BIOS to factory settings. Different BIOS gives different options to set itself to factory settings, like Restore Defaults, Load BIOS Defaults, and Load Optimal Defaults, so you should choose the correct one according to practical situations.
However, when this solution does not work, you must change hard disk mode manually in BIOS. If the current state is IDE, change it to AHCI. If the current mode is AHCI, change it to IDE, etc. Actually, if Compatibility or Compatible is given, you must choose this mode.
change sata controller mode
Moreover, when you are installing Data Center or Enterprise Server edition of Windows Server 2008/R2 or later to a raw disk via CD or DVD, you may get the same error. This is because the default SAN policy during setup on new installations of Data Center or Enterprise SKUs is Offline Shared, which applies Offline and Read Only attributes to any presented disks that are on a shared bus and not considered as System or Boot disks.
RAW disks cannot be detected as System or Boot, leading to offline and read only attributes. As a result, you cannot install Windows to this kind of disks. To solve the problem, configure the default SAN policy to OnlineAll. For detailed steps, please see the corresponding Setup Reports Error of Microsoft.
To avoid this issue, configure the default SAN policy to OnlineAll using an unattend answer file integrated into the boot.wim and install.wim images of the installation media to install from or use the setsanpolicy.cmd included with WAIK or the OPK
WARNING: After the installation completes ensure you reset the SAN policy back to OfflineShared using Diskpart.exe to to prevent data loss in scenarios where disks are unintentionally presented to a server that contain critical data.
