OK模式总结文档.docxVIP

OK模式总结--------------段承龙 2011年4月22日概念OBP：OpenBootPROM，能理解成普通Pc的BIOS增强版，他是控制sun服务器的引导过程、初始化设置某些硬件和提供了某些诊断的工具。其设置保存在主板的prom固件中，设置的方式是通过OBP命令行下进行设置。OBP版本：1.x The ?rst boot PROM used on SPARC? systems.2.x The ?rst OpenBoot PROM.3.x The OpenBoot PROM with a ?ash update feature. You canupdate the 3.x ?rmware without having to replace the bootPROM chip. This generation was introduced with the SunUltraSPARC? product line.4.x The OpenBoot PROMthat supports the 64-bit UltraSPARCIII processor.5.x Available on the Sun Enterprise? 3500, 4500, 5500, and6500 servers.查看OBP版本在系统里，prtdiag -v的最后一行在OK模式，输入 bannerNVRAM这也是一个重要的概念。这是一个可移除的芯片，通常是在系统主板上。NVRAM模块包含electronically erasable programmableread-only memory (EEPROM)。这上面存储了用户的配置信息。通过锂电池保存信息。分为两部分：可编辑部分The time-of-day (TOD) clock valueThe con?guration data describing system operating parametersA diagnostic mode switch that enables or disables power-on self-test(POST)The device name and the path to the default boot deviceA location for customized programming that is used during the bootprocess不可编辑部分The Ethernet address, such as 8:0:20:5d:6f:9eThe system host ID value, such as 805d6f9e注： Remember to retain the NVRAM chip, because it contains the hostID. Many licensed software packages are based on the system host ID.The NVRAM chip has a yellow sticker with a bar code on it. If the chipfails, Sun can replace the chip if given the numbers below this bar code.The replacement chip has the same host ID and Ethernet address. It can beplugged into the same location on the motherboard as the chip it isreplacing.OBP和NVRAM的关系图如何进入OBP模式halt系统，或者init 0使用组合键stop-A（警告：在操作系统已开始使用后，STOP-A进入OBP执行命令可能会失败，并且某些命令可能会使系统不可用需要重新启动。如:probe-scsi）设置auto-boot?为false的话每次开机都会进入OBP模式。如果不想进入设置成true。系统检测到硬件错误时，并且不能跳过的话会进入OBP模式使用串口，ctrl+break进入OBP模式在设备自检的时候，ctrl+break打断进入OBP模式OBP模式下的基本命令命令描述用法bannerDisplays the power-on banner直接输入bannerbootBoots the systemboot device_name– options-sBoots the system to a single-user mode and asks the user forthe root password.-aBoots the