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发表于 : **2010-03-05 12:07**

现在, 你需要确保你的系统硬件可以使用启动块从任何一块磁盘上正常启动。在i386上, 这要根据你的硬件，你可以通过调整主板的CMOS/BIOS菜单或者控制卡的菜单来实现。

在i386上, 使用你机器上的系统菜单来设定启动设备顺序 / 或者选择Disk1/wd1，然后是Disk0/wd0. 本例是一个普通的Award BIOS.

Figure 16.6. Award BIOS i386 Boot Disk1/wd1

保存修改并退出。

>> NetBSD/i386 BIOS Boot, Revision 3.1
>> (seklecki@localhost, Fri Aug 13 08:08:47 EDT 2004)
>> Memory: 640/31744 k
Press return to boot now, any other key for boot menu
booting hd0a:netbsd - starting in 30

你可以确定BIOS正在读Disk1/wd1，因为等待时间为30秒而非15秒. 重新启动后, 再次进入BIOS 并将启动顺序恢复到默认的配置:

Figure 16.7. Award BIOS i386 Boot Disk0/wd0

保存修改并退出。

>> NetBSD/i386 BIOS Boot, Revision 3.1
>> (seklecki@localhost, Fri Aug 13 08:08:47 EDT 2004)
>> Memory: 640/31744 k
press return boot, any other key for boot menu
booting hd0a:netbsd - starting in 15

注意你的定制内核检测出控制器/总线/驱动器分配上是以BIOS的分配为依据的。这是我们期望的效果.

在sparc64, 使用Sun OpenBoot devalias 来确保两个磁盘都可启动:

Sun Ultra 5/10 UPA/PCI (UltraSPARC-IIi 400MHz), No Keyboard
OpenBoot 3.15, 128 MB memory installed, Serial #nnnnnnnn.
Ethernet address 8:0:20:a5:d1:3b, Host ID: nnnnnnnn.

ok devalias
[...snip...]
cdrom /pci@1f,0/pci@1,1/ide@3/cdrom@2,0:f
disk /pci@1f,0/pci@1,1/ide@3/disk@0,0
disk3 /pci@1f,0/pci@1,1/ide@3/disk@3,0
disk2 /pci@1f,0/pci@1,1/ide@3/disk@2,0
disk1 /pci@1f,0/pci@1,1/ide@3/disk@1,0
disk0 /pci@1f,0/pci@1,1/ide@3/disk@0,0
[...snip...]

ok boot disk0 netbsd
Initializing Memory [...]
Boot device /pci/pci/ide@3/disk@0,0 File and args: netbsd
NetBSD IEEE 1275 Bootblock
>> NetBSD/sparc64 OpenFirmware Boot, Revision 1.8
>> (lavalamp@j8, Thu Aug 19: 15:45:42 EDT 2004)
loadfile: reading header
elf64_exec: Booting [...]
symbols @ [....]
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001
The NetBSD Foundation, Inc. All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
[...snip...]

而第二块磁盘:

ok boot disk2 netbsd
Initializing Memory [...]
Boot device /pci/pci/ide@3/disk@2,0: File and args:netbsd
NetBSD IEEE 1275 Bootblock
>> NetBSD/sparc64 OpenFirmware Boot, Revision 1.8
>> (lavalamp@j8, Thu Aug 19: 15:45:42 EDT 2004)
loadfile: reading header
elf64_exec: Booting [...]
symbols @ [....]
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001
The NetBSD Foundation, Inc. All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
[...snip...]

每次启动中, 下列信息应该都可以显示在NetBSD的内核 dmesg(8) 里:

raid0: RAID Level 1
raid0: Components: /dev/wd0a /dev/wd1a
raid0: Total Sectors: 19540864 (9541 MB)
boot device: raid0
root on raid0a dumps on raid0b
root file system type: ffs

一旦你确认了从两块磁盘都可以启动, 每次启动后检查RAID的奇偶校验是否是干净的:

代码: 全选

# raidctl -v -s raid0
Components:
          /dev/wd0a: optimal
          /dev/wd1a: optimal
No spares.
[...snip...]
Component label for /dev/wd0a:
   Row: 0, Column: 0, Num Rows: 1, Num Columns: 2
   Version: 2, Serial Number: 2004082401, Mod Counter: 67
   Clean: No, Status: 0
   sectPerSU: 128, SUsPerPU: 1, SUsPerRU: 1
   Queue size: 100, blocksize: 512, numBlocks: 19540864
   RAID Level: 1
   Autoconfig: Yes
   Root partition: Yes
   Last configured as: raid0
Component label for /dev/wd1a:
   Row: 0, Column: 1, Num Rows: 1, Num Columns: 2
   Version: 2, Serial Number: 2004082401, Mod Counter: 67
   Clean: No, Status: 0
   sectPerSU: 128, SUsPerPU: 1, SUsPerRU: 1
   Queue size: 100, blocksize: 512, numBlocks: 19540864
   RAID Level: 1
   Autoconfig: Yes
   Root partition: Yes
   Last configured as: raid0
Parity status: clean
Reconstruction is 100% complete.
Parity Re-write is 100% complete.
Copyback is 100% complete.

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《NetBSD指南-16.3.11.测试启动块》