为了能够解决启动问题，有时我们必须使用 CDROM 以单用户模式启动系统。
这是访问根文件系统并找出导致引导问题的问题所必需的。
这篇文章描述了如何使用 CDROM 启动并挂载 zfs 根文件系统 (rpool)。
- 在单用户模式下从 CDROM 引导系统。
ok boot cdrom -s Boot device: /pci@8,700000/scsi@1/disk@6,0:f File and args: -s SunOS[TM] Release 5.10 Version Generic_137137-09 64-bit Copyright 1983-2008 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.
- 在 /mnt 挂载点上导入 ZFS 根池以允许修改或者检查引导环境 (BE) 中的文件：
# zpool import -R /mnt rpool cannot mount '/mnt/export': failed to create mountpoint cannot mount '/mnt/export/home': failed to create mountpoint cannot mount '/mnt/rpool': failed to create mountpoint
- 列出 zfs 文件系统：
# zfs list NAME USED AVAIL REFER MOUNTPOINT rpool 16.7G 16.5G 94K /mnt/rpool rpool/ROOT 8.30G 16.5G 18K legacy rpool/ROOT/sol10-u6 21.1M 16.5G 8.20G /mnt rpool/ROOT/sol10-u6-patch 8.28G 16.5G 8.20G /mnt rpool/ROOT/sol10-u6-patch@sol10-u6-patch 85.2M - 8.20G rpool/dump 2.00G 16.5G 2.00G rpool/export 411M 16.5G 411M /mnt/export rpool/export/home 19K 16.5G 19K /mnt/export/home rpool/swap 6G 22.5G 16K
- 挂载包含操作系统的数据集：
# zfs mount rpool/ROOT/sol10-u6 # df -k Filesystem kbytes used avail capacity Mounted on /ramdisk-root:a 171135 168424 0 100% / /devices 0 0 0 0% /devices ctfs 0 0 0 0% /system/contract proc 0 0 0 0% /proc mnttab 0 0 0 0% /etc/mnttab swap 3753208 344 3752864 1% /etc/svc/volatile objfs 0 0 0 0% /system/object sharefs 0 0 0 0% /etc/dfs/sharetab swap 3753464 600 3752864 1% /tmp /tmp/dev 3753464 600 3752864 1% /dev fd 0 0 0 0% /dev/fd swap 3752864 0 3752864 0% /tmp/root/var/run rpool/ROOT/sol10-u6 34836480 8597005 17316644 34% /mnt
- 通过挂载点访问引导环境：
# cd /mnt # ls a devices kernel platform ssd_state2.out b dtrace.d kk policia storage bin dtrace.out lib proc system boot etc mbox rmdisk tmp cdrom export mnt rpool truss.out core file mnt2 sbin usr data file+ net ssd_out var dev home opt ssd_state.out vol
- 完成后，导出根池并重启：
# cd / # zpool export rpool # zpool list no pools available # reboot
日期：2020-09-17 00:15:22 来源：oir作者：oir