E4900系统起不来
大家好：用户有台4900，他们做了修改共享内存的操作（在system文件的最后一行加入Set shmsys:shminfo_shmmax=XXX）。
然后重启的时候，发现系统起不来。boot -s也起不来。boot cdrom -s也不行。
以下是启动过程的报错：
Sun Fire E4900
OpenFirmware version 5.20.8 (11/20/07 10:32)
Copyright 2007 Sun Microsystems, Inc.All rights reserved.
Use is subject to license terms.
SmartFirmware, Copyright (C) 1996-2001.All rights reserved.
32768 MB memory installed, Serial #78341300.
Ethernet address 0:14:4f:ab:64:b4, Host ID: 84ab64b4.
Rebooting with command: boot
SunOS Release 5.10 Version Generic_141414-07 64-bit
Copyright 1983-2009 Sun Microsystems, Inc.All rights reserved.
Use is subject to license terms.
Cannot open mirrored root device, error 6
Cannot remount root on /pseudo/md@0:0,10,blk fstype ufs
panic/thread=180e000: vfs_mountroot: cannot remount root
000000000180b950 genunix:vfs_mountroot+380 (21, 2000, 191bf18, 18f1c88, 18ec400, 18ec998)
%l0-3: 0000000000000001 0000000000008025 0000060032c6a080 0000000001263c00
%l4-7: 00000000018ec750 0000060032c6a080 000000000191bf18 0000000000002021
000000000180ba10 genunix:main+a0 (1835da0, 180c000, 188e7c0, 1943400, 183c1a8, 1835c00)
%l0-3: 000000000180c000 000000000180c000 0000000070002000 0000000000000000
%l4-7: 0000000001896c00 0000000000000008 000000000180c000 0000000000000000
syncing file systems... done
skipping system dump - no dump device configured
rebooting...
Resetting ...
{/N0/IB6/P0} Passed
{/N0/IB6/P1} Passed
{/N0/IB8/P0} Passed
{/N0/IB8/P1} Passed
然后就是反复如上输出。
请问，该如何把系统启起来呢？
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