SUMMARY: /etc/mnttab: What are those numbers after "dev="?

Keith Salustro (
Tue, 03 Feb 1998 11:20:06 -0500

Thanks for the prompt replies!

Basically you're not supposed to edit /etc/mnttab, and some people said it
gets rewritten on boot anyway.... I was referred to "man metaroot" and the
manual "unmirroring root" in the index.Very helpful.

What I had to do was to mount my detached root partition under /mnt and run
metaroot, which made the _correct_ modifications to the system file (as
opposed to my deleting all the DiskSuite items) and vfstab for me. Then I
modified the rest of vfstab myself and presto! Here's the command:
metaroot -k /mnt/etc/system -v /mnt/etc/vfstab -c /mnt/etc/opt/SUNWmd/
(the extra parameters were to specify the correct location of the files)

(Then I created an alias in the bootPROM for the backup root partition, and
I can now boot on my backup config if I have a problem with the upgrade I'm
doing on the default partitions.)

THANKS for the help from these folks:
Richard Roberto <>
"Matthew Stier" <>
shobhit kapoor <>
Sean Ward <>
Jim Harmon <>

At 02:05 PM 2/3/98 +0900, you wrote:
>On Mon, 2 Feb 1998, Keith Salustro wrote:
>> Hi,
>> What do the numbers after "dev=" in /etc/mnttab mean? I've looked in
>> several books and found nothing. We're using DiskSuite and I want to modify
>> edit this table so I can boot off of the regular (/dev/dsk/c0t0d0s0)
>> partitions. I found that editing only /etc/vfstab was not enough--the
>> system keeps loading the DiskSuite device names, so I'm going to try to
>> edit mnttab as well.
>Please read the DiskSuite answerbook under "un-mirroring root".
>That should give you the clues you need. Don't edit mnttab since it
>has nothing to do with that. It gets written to as devices are
>mounted, but has nothing to do with what gets mounted.
>Good luck

Keith W. Salustro, Project Manager
Secure Networks Corporation
Main: 800-357-0208
Fax: 617-876-1548

Direct: 617-875-7672 ---------------------------------------------------