我有一台连接到可重构计算机（带有 BORPH 系统）的 NFS 服务器。我使用 minicom 和“run netboot”通过 DHCP+TFTP+NFS 进行引导，然后出现以下错误：
Sending DHCP requests .<6>eth0: link is up, 100 FDX, pause enabled
., OK
IP-Config: Got DHCP answer from 192.168.100.1, my address is 192.168.100.2
IP-Config: Complete:
device=eth0, addr=192.168.100.2, mask=255.255.255.0, gw=192.168.100.1,
host=roach030193, domain=, nis-domain=(none),
bootserver=192.168.100.1, rootserver=192.168.100.1,
rootpath=/srv/roachboot/etch
Looking up port of RPC 100003/2 on 192.168.100.1
rpcbind: server 192.168.100.1 not responding, timed out
Root-NFS: Unable to get nfsd port number from server, using default
Looking up port of RPC 100005/1 on 192.168.100.1
rpcbind: server 192.168.100.1 not responding, timed out
Root-NFS: Unable to get mountd port number from server, using default
mount: server 192.168.100.1 not responding, timed out
Root-NFS: Server returned error -5 while mounting /srv/roachboot/etch
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "192.168.100.1:/srv/roachboot/etch" or
unknown-block(2,0)
Please append a correct "root=" boot option; here are the available
partitions:
0100 4096 ram0 (driver?)
0101 4096 ram1 (driver?)
0102 4096 ram2 (driver?)
0103 4096 ram3 (driver?)
0104 4096 ram4 (driver?)
0105 4096 ram5 (driver?)
0106 4096 ram6 (driver?)
0107 4096 ram7 (driver?)
0108 4096 ram8 (driver?)
0109 4096 ram9 (driver?)
010a 4096 ram10 (driver?)
010b 4096 ram11 (driver?)
010c 4096 ram12 (driver?)
010d 4096 ram13 (driver?)
010e 4096 ram14 (driver?)
010f 4096 ram15 (driver?)
1f00 1792 mtdblock0 (driver?)
1f01 256 mtdblock1 (driver?)
1f02 8192 mtdblock2 (driver?)
1f03 54656 mtdblock3 (driver?)
1f04 256 mtdblock4 (driver?)
1f05 384 mtdblock5 (driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-
block(2,0)
当我在 centos 6.5 中禁用防火墙时
service iptables stop
我看到以下错误
IP-Config: Got DHCP answer from 192.168.100.1, my address is 192.168.100.2
IP-Config: Complete:
device=eth0, addr=192.168.100.2, mask=255.255.255.0, gw=192.168.100.1,
host=roach030193, domain=, nis-domain=(none),
bootserver=192.168.100.1, rootserver=192.168.100.1,
rootpath=/srv/roachboot/etch
Looking up port of RPC 100003/2 on 192.168.100.1
Looking up port of RPC 100005/1 on 192.168.100.1
VFS: Mounted root (nfs filesystem) readonly.
Freeing unused kernel memory: 136k init
Warning: unable to open an initial console.
warning: `ntpd' uses 32-bit capabilities (legacy support in use)
然后控制台就卡住了。