Booting from alternate disk

From: sun_question question (sun_question@hotmail.com)
Date: Mon Sep 30 2002 - 15:43:07 EDT


Hello Managers,
OS=Solaris 2.6
I loaded OS on an external disk on target 4 controller 1 (c1t4)and was able
to boot fine from it. Then I moved that disk on to target 5 (c1t5) and
changed /etv/vfstab accordingly.
I setup an alias to boot from that disk and did a "boot <alias>". It finds
the disk and boot block okay but now it complains about not able to mount
/usr and goes back to OK prompt. I booted from internal disk and was able
mount that slice (/usr) manually just fine. I tried switching external disk
to c1t3 and still same /usr related error.
I checked and there are no target conflicts. The disk boots happily when
switched back to c1t4 from c1t5.
I saw following as solution on sunmanagers but it's not clear to me...
Could someone please shed more light on how to use mknod and create links?
>>
>> cd /devices/sbus@1,f8000000/esp@0,800000
>> mknod ......
>> link all required things like /dev/dsk/* /dev/rdsk/* /dev/sd2* /dev/rsd2*
>>.
>> change vfstab entries from t3 to t2.
>> change the SCSI target to 2; halt.
>> boot disk2.

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