R420服务器idrac连接用户数超限制

Dell R420服务器中，比较经常出现idrac无法连接，或者连接用户数超限(RAC0218错误)的问题，升级iDrac卡firmware至1.57.57即可解决。

该版本的bug fix中提到过一点：

• Fix for issues that cause iDRAC7 sluggish responsiveness after a prolonged period of time (approx. 45-100 days, depending on the usage). In some cases, if the iDRAC is not reset, the iDRAC may become unresponsive and requires a server AC Power on reset. This issue was introduced in firmware release 1.50.50 and fixed in 1.56.55.

RAC0218: The maximum number of user sessions is reached.

2种临时解决方法(idrac重新初始化)

• 长按前面板i键20秒，idrac会重启初始化 （建议使用这种方法，无需重启服务器）
• 关机后拔掉电源线，长按电源开关按键15秒，再插上电源线开机

tftp server准备

• 1.57.57
• 1.66.65
• 当前最新版2.30.30.30
  • 支持HTML5 virtual console and virtual media

#升级以1.57.57为例，也可选择更高版本使用
wget http://downloads.dell.com/FOLDER02171695M/1/ESM_Firmware_XH6FX_LN_1.57.57_A00.BIN
sh ESM_Firmware_XH6FX_LN_1.57.57_A00.BIN --extract ./idrac7-1.57.57
cp ./idrac7-1.57.57/payload/firmimg.d7 /var/lib/tftpboot/dell/idrac7-1.57.57

firmware升级方法

• 通过iDrac7 Web GUI升级
• 通过ssh登录升级

#ssh登录后进行firmware更新
ssh root@iDrac_IP
racadm fwupdate -g -u -a $tftp_server_ip -d /dell/idrac7-1.57.57

• 通过racadm命令行升级

racadm -r iDrac_IP -u root -p calvin fwupdate -g -u -a $tftp_server_ip -d /dell/idrac7-1.57.57