本文章介绍NetApp FAS8300更换控制器后，启动的时候未发现硬盘，反复重启。本文章适用于FAS8300和A400，1、更换控制器后，启动过程未发现硬盘，告警信息如下：WARNING: 0 disks found! Storage Adapters found: 0 Fibre Channel Storage Adapters found! 4 SAS Adapters found! 0 Parallel SCSI Storage Adapters found! 0 ATA Adapters found! Select option 4 from the boot menu to choose disks for the root volume and spare core space. Target Adapters found: 4 Fibre Channel Target Adapters found! 0 iSCSI Target Adapters found! WARNING: there do not appear to be any disks attached to the system. No root volume found. Rebooting... (press ctrl-c during boot to break reboot loop)2、这是NetApp FAS8300和A400型号的bug问题，是因为新控制器未接管旧控制器的磁盘归属，（自动重启2-3次可能会识别到盘，如果重启2-3次还没有识别到盘，那需要手动把磁盘归属分配给新控制器）控制先进入维护模式，启动在信息提示到如下信息，按ctrl+c，看信息出现Boot Menu
