错误信息如下：
s3c2410-rtc s3c2410-rtc: hctosys: invalid date/time
eth0: link down
IP-Config: Complete:
device=eth0, addr=192.168.0.3, mask=255.255.255.0, gw=192.168.0.2,
host=sbc2440, domain=, nis-domain=arm9.net,
bootserver=192.168.0.2, rootserver=192.168.0.2, rootpath=
Looking up port of RPC 100003/2 on 192.168.0.2
eth0: link up, 100Mbps, full-duplex, lpa 0xCDE1
rpcbind: server 192.168.0.2 not responding, timed out
Root-NFS: Unable to get nfsd port number from server, using default
Looking up port of RPC 100005/1 on 192.168.0.2
rpcbind: server 192.168.0.2 not responding, timed out
Root-NFS: Unable to get mountd port number from server, using default
Root-NFS: Server returned error -5 while mounting /rootfs_qtopia_qt4
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "nfs" or unknown-block(2,0)
Please append a correct "root=" boot option; here are the available partitions:
1f00 256 mtdblock0 (driver?)
1f01 128 mtdblock1 (driver?)
1f02 5120 mtdblock2 (driver?)
1f03 256640 mtdblock3 (driver?)
1f04 262144 mtdblock4 (driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
Backtrace:
[<c00341cc>] (dump_backtrace+0x0/0x10c) from [<c03297d0>] (dump_stack+0x18/0x1c)
r7:c03db108 r6:00008000 r5:c3923000 r4:c0481b10
[<c03297b8>] (dump_stack+0x0/0x1c) from [<c0329820>] (panic+0x4c/0x114)
[<c03297d4>] (panic+0x0/0x114) from [<c0008dbc>] (mount_block_root+0x174/0x228)
r3:c38599ec r2:00000000 r1:c3823f60 r0:c03db0a0
[<c0008c48>] (mount_block_root+0x0/0x228) from [<c0008f34>] (mount_root+0xc4/0xfc)
[<c0008e70>] (mount_root+0x0/0xfc) from [<c0009094>] (prepare_namespace+0x128/0x180)
r5:c002081d r4:c04814e0
[<c0008f6c>] (prepare_namespace+0x0/0x180) from [<c00084b0>] (kernel_init+0xe0/0x114)
r5:c001f180 r4:c04812a0
[<c00083d0>] (kernel_init+0x0/0x114) from [<c004bbbc>] (do_exit+0x0/0x620)
r5:00000000 r4:00000000
我虚拟机中的NFS配置没任何问题，板子也没问题，把板子拿到别的电脑上没问题，我还把别人的linux拷贝到我电脑中的虚拟机中试了还是不行，都是出现这个错误，是不是我电脑出问题了啊？求大侠帮帮忙啊
