setting up boot and mirror devalias

[gallows]

I am in the process of mirroring the rootdisk with Solaris 9 VM on a SunFire280R. I only have 2 36GB drives that came with the system. I want to set it up so that if the boot disk fails, the mirror will take over for the boot. The output of format:
AVAILABLE DISK SELECTIONS:
0. c1t0d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
/pci@8,600000/SUNW,qlc@4/fp@0,0/ssd@w500000e0108fb591,0
1. c1t1d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
/pci@8,600000/SUNW,qlc@4/fp@0,0/ssd@w500000e0108fbc11,0

The device path:
# ls -l /dev/dsk/c1t0d0s0 /dev/dsk/c1t1d0s0
lrwxrwxrwx 1 root root 70 Oct 14 19:20 /dev/dsk/c1t0d0s0 -> ../../devices/pci@8,600000/SUNW,qlc@4/fp@0,0/ssd@w500000e0108fb591,0:a
lrwxrwxrwx 1 root root 70 Oct 14 19:20 /dev/dsk/c1t1d0s0 -> ../../devices/pci@8,600000/SUNW,qlc@4/fp@0,0/ssd@w500000e0108fbc11,0:a

The only thing that looks different is the ssd@w.... I don't think the world number is part of the device so how does the system know which is which?
How can I set up an alias called rootmirror and have it boot if the normal disk fails?

I'm confused as usual. Any help would be greatly appreciated.

Tks

 

[spamly]

Can I suggest the following website?

http://unixway.com/vm/disksuite/mirroros.html

I've used it for Solaris 2.6, 8, and 9.

 

[gallows]

Thanks Spamly. I looked at the url. I will check out the sdsinstall script. I never heard of it. In their example, it shows:
# eeprom "nvramrc=devalias sds-root /pci@1f,4000/scsi@3/disk@0,0
devalias sds-mirror /pci@1f,4000/scsi@3/disk@1,0"

Makes sense to me because of the disk@0,0 and disk@1,0. I don't know how to apply that to my case. That is actually what I am trying to figure out.
Thanks again!! I appreciate the response.

gallows

 

[bfitzmai]

Gallow,
Don't forget to set-up NVRAM variable boot-device to your
new device names.

setenv boot-device sds-root sds-mirror

 

[daFranze]

as long as you do not reboot a system, which root device is failed and is mirrored, you will never need the devicealiases and boot-devices, but it is ok to have them

Best Regards, Franz
--
Solaris System Manager from Munich, Germany
I used to work for Sun Microsystems Support (EMEA) for 5 years