Problem In accessing Single User / LVM Maintenance Mode

[Shyam Sundar]

Hi,

In our HP J6000 System running HP-UX 11.00, we are not able to access single user / LVM maintenance mode.

We are accessing all system consoles thru' Windows Hyperterminal. When we try to go into any one of these modes, the display is fine until starting STREAMS deamons-Phase-2. After that the console is getting fully filled with garbage (unreadable bits with lots of special characters).

It configures ROOT/SWAP/DUMP, then it starts the STREAMS deamons-Phase 1. It checks the root filesystem, creates STCP device files and goes for STREAMS-Phase 2. The problem starts right after this.

This is happening only in one system. There is no problem with the Windows system / Hyperterm config / Serial cable (as other systems are working fine). Also then system gives proper display when booted in multiuser mode.

Pls. help me on solving this as i need to do some modifications on swap and root filesystems.

Thanks & Regards,
Shyam.

[harry d brown jr]

What's the term type on the J in single user mode? check the gsp.

live free or die
harry

[Jeff Schussele]

Hi Shyam,

There was an almost identical thread a couple of months ago - see this one

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x9a9a8cc5e03fd6118fff0090279cd0f9,00.html

Not sure if it was resolved but Bill Hassell may have pegged it & it has to do wih stty settings- probably -parenb being set by an rc script - hence the problem when you hit the "Streams" section....
Follow Bill's advice & see if that doesn't solve it.

HTH,
Jeff

[Shyam Sundar]

Hi,

Correction :

The system behaves in the same way during normal bootup also. It gives the same garbage output after Streams Daemons. Then it gives a message of "B2352B/9245XB HP-UX (B.11.00)". Then it goes to unreadable screen. But after starting all run level scripts it gives the Console Login in proper English.

But whereas in single user / LVM mode it never gives me the prompt.

Jeff: Nothing worked out on looking the gettydefs / inittab.

Regards,
Shyam.

[Steve Steel]

Hi

Saw this in a previous forum

Edit root's .profile and add a
'stty cread' command to enable the receiver
after the PATH is set.


Steve Steel

[Shyam Sundar]

Hi,

Steve: Thanks for your response.

By adding the stty cread entry in root's .profile file, i was able to avoid system hang in single user mode.
It gave the prompt to me, but i was not able to read anything which i was executing in the console.

With this I entered INIT 1 (#init 1), but again the runlevel scripts from single user mode to init-1 were full of unreadable characters.

As soon as the Console login came, the display came back to normal in runlevel-1 and also we were able to see the commands which we executed. With init-1, I was able to extend /var, /opt and /tmp filesystems. But still i have to extend /usr, which can be done only in single user mode.

Could anyone help me on solving this completely?

Regards,
Shyam