求助p570小机开机报错停在代码0555

p570小机，没有分区，2个笼子，2个硬盘做mirror。
hdisk0,hdisk1.都有hd5的lv.默认从hdisk0启动
关机拔下一个镜像盘hdisk1，重启小机在看到kernl aix的节目之后
停住了，前面板一直停在0555这个提示上。强制开关关机方式无效！！！
求助。。。。。。。。。。。。。。。。

这是我查到的代码对应的错误描述：
552 The ipl_varyon command failed with a return code not equal to 4, 7, 8 or 9 (ODM or malloc failure). System is unable to vary on the rootvg.
553 The /etc/inittab file has been incorrectly modified or is damaged. Phase 1 boot is completed and the init command started.
554 The IPL device could not be opened or a read failed (hardware not configured or missing).
555 The fsck -fp /dev/hd4 command on the root file system failed with a non-zero return code.
556 LVM subroutine error from ipl_varyon.
557 The root file system could not be mounted. The problem is usually due to bad information on the log logical volume (/dev/hd8) or the boot logical volume (hd5) has been damaged.