Veritas Boot

[MBNA SAN Team]

I have a veritas root disks mirrored. How do I find out the device from which the server boots??

Remember its a veritas disks and not LVM. So no LVM commands please??

[Jeff Schussele]

Hi,

Run the following command:

setboot

It will show primary & alternate bootpaths.
You'll normally boot from the primary, but could boot from the alternate.

Rgds,
Jeff

[MBNA SAN Team]

But I need to know from which device the server has booted from..
setboot gives the primary and alternate boot paths but does not specify the actual boot from a particular device

[RAC_1]

echo "boot_string/D"|adb -k /stand/vmunix /dev/kmem

Anil

[MBNA SAN Team]

Anil - how do u interpret the string

echo "boot_string/D"|adb -k /stand/vmunix /dev/kmem
boot_string:
boot_string: 674311984

[Ashwani Kashyap]

#echo :boot_string/S" | adb -k .stand/vmunix /dev/kmem .

This should give you the hardware address of the disk that you booted from .

[Ashwani Kashyap · Accepted solution]

sorry typo , it should be

#echo "boot_string/S" | adb -k /stand/vmunix /dev/kmem

[steven Burgess_2]

Hello counterpart

I work for your sister company in the UK

Nice to see you in the forum, look forward to speaking again

Regards

Steve

[MBNA SAN Team]

Thanks Anil and Ashwani. I have also found another way to find the device from dmesg.
Look for this line in dmesg

Dump device table: (start & size given in 1-Kbyte blocks)
entry 0000000000000000 - major is 31, minor is 0x2a0600; start = 310368, size = 6291456

Converting the hex - 2a060 in decimal gives u the boot device c36t0d0 which is on the hardware path 0/0/6/0/0/4/0.20.32.0.0.0.6
which has the same path from the below command output
echo "boot_string/S" | adb -k /stand/vmunix /dev/kmem
boot_string:
boot_string: (0/0/6/0/0/4/0.20.32.0.0.0.6;)/stand/vmunix

From the ioscan output we can see that the device
disk 169 0/0/4/0/0/4/0.20.32.0.0.0.6 sdisk CLAIMED DEVICE HP OPEN-V*2
/dev/dsk/c36t0d6 /dev/rdsk/c36t0d6

I would prefer the dmesg and grep in ioscan rather using adb to look into kernel and stand.