boot drive 1

[simanek]

Hi all,

I have an ultra 5 with 2 hard drives. both of these drives have bootable partitions. How can i tell, without rebooting, which drive I booted from? Or at the very least, how can I tell which is the master drive?

Thanks. Mike
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simanek@uiuc.edu
"It's a Swingline!"
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[lfoata]

You can use eeprom to see from which drive you boot

 

[jephilc]

There are several ways. One is to do a df -k and see where
the / filesystem is mounted from, another is to look at
either dmesg or the file /var/adm/messages to see the boot sequence information, there will be a line saying something like "root on /sbus@1f,0..........." the end will be 0,0:a for example, this is on sbus0 (first controller) and is target 0, disk 0 and partition a (the first partition). The address of the above would be /dev/dsk/c0t0d0s0.
You could always shut the machine down and look at:
Do a printenv to see what boot-device is set to, normally it is "disk". Now do a devalias disk to see what "disk" is assigned to. This should be the physical path of the boot disk.
Good luck John Philcox
Mobile Ventures Limited UK

http://www.mobile-ventures.net