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SVM - RAID 1 (Mirror) only for x86
So I need to write this doc now, since boot process for x86 platform is different then for SPARC.
A x86 disk is different than SPARC one, because more than one OS can run on the x86.
The GRUB was created to manage which OS to boot to.
Solaris 10 is using GRUB for booting, read more about this here
Before partitioning disk, a Solaris fdisk partition must be created.
The fdisk partition is portion of disk dedicated for Solaris. Of course, the easiest way is if whole disk is dedicated for Solaris.
Tips about fdisk:
1. Max numbers of fdisk partitions are 4.
2. Solaris fdisk partition must begin at cylinder 1 on the first disk. Master boot record goes to cylinder 0.
The command format on x86 includes fdisk program. You cannot find this under "sparc format" command.
This is example for SunFire X4200, how to create SVM Mirror (RAID 1) for root FS
Creating 2 submirrors
(-f = force it, since FS is mounted on this slice)
# metainit -f d10 1 1 c1t0d0s0
Creating one-way mirror
Edit /etc/vfstab file
(This edits the /etc/vfstab and /etc/system files)
This line shows in /etc/vfstab
/dev/md/dsk/d0 /dev/md/rdsk/d0 / ufs 1 no -
These lines shows in /etc/system file
* Begin MDD root info (do not edit)
* End MDD root info (do not edit)
# init 6
Attach second submirror
Install GRUB on second slice
# metainit d20 1 1 c1t1d0s0
Find physical path of alternate root device - slice we attached to one-way mirror
# installgrub -fm /boot/grub/stage1 /boot/grub/stage2 /dev/rdsk/c1t1d0s0
stage1 written to partition 0 sector 0 (abs 16065)
stage2 written to partition 0, 233 sectors starting at 50 (abs 16115)
stage1 written to master boot sector
Setup boot "environment variables" for second/alternate path. This is done with command eeprom and information is stored in file /boot/solaris/bootenv.rc
# ls -l /dev/rdsk/c1t1d0s0
/dev/rdsk/c0t1d0s0 -> ../../devices/pci@0,0/pci1022,7450@2/pci1000,3060@3/sd@1,0:a,raw
The file /boot/solaris/bootenv.rc now has these lines:
# eeprom altbootpath=/pci@0,0/pci1022,7450@2/pci1000,3060@3/sd@1,0:a
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setprop bootpath '/pci@0,0/pci1022,7450@2/pci1000,3060@3/sd@0,0:a'
setprop altbootpath '/pci@0,0/pci1022,7450@2/pci1000,3060@3/sd@1,0:a'