各位大神；
我现在有一台cisco 从507R-E交换机启动报下列错误请各位指点。
Checking the partition table and boot sector...
Checking FAT, Files and Directories...
Reclaiming unused space...
Updating FAT...
Rom Monitor Program Version 12.2(44r)SG5
CPU Rev: 2.1, Board Rev: 8, Board Type: 103, CPLD Nexu Rev: 9
Chassis: WS-C4507R-E
Front Panel Phy is Bcm5482s
Got Mac Address: 00:25:84:1e:21:fc
MAC Address : 00-25-84-1e-21-fc
Ip Address : Not set.
Netmask : Not set.
Gateway : Not set.
TftpServer : Not set.
rommon 1 >
rommon 1 >
rommon 1 >boot
File has bad file magic number: 0x0. Is it a valid file?
boot: can not load "bootflash:"
rommon 2 >boot bootflash:cat4500e-ipbase-mz.122-52.XO.bin
File has bad file magic number: 0x0. Is it a valid file?
boot: can not load "bootflash:cat4500e-ipbase-mz.122-52.XO.bin"
rommon 3 >
原文：http://11069028.blog.51cto.com/11059028/1887109