learning to recover from system failure

[JUN-Chan]

hi,
i have created the system recovery tape using the command make_tape_recovery n i would like to know how am i goin to use this tape to recover from system failure?? from wat i know is insert the tape to tape drive, reboot the system, interrupt the process....but i dunno wats the exact command i need to use such as redirect to the tape drive....i'm using HP-UX 11.0

[T G Manikandan]

Interupt the boot prosess.
At prompt enter:-

main>sea

find the path to tape drive


sea>bo alt

The prompts which follow this will be understandable.


Thanks

[T G Manikandan]

ALso check this link

http://www2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000062908573

[Michael Tully]

One of the best ways to make sure that you have the hardware path of your tape drive for when you interrupt the boot process is to have a copy of your 'ioscan' output beforehand. So when you you use the 'SEA' option after you have stopped the boot process, you will know which is the tape drive.

[JUN-Chan]

hi , wats the ioscan command i should use to determine the tape drive device?? thanks in advance

[Michael Tully]

Just for the tape drives on your system:

# ioscan -fnkC tape

[JUN-Chan]

so let say my tape drive path is /dev/rmt/0m,
at prompt i should enter
main>bo alt /dev/rmt/0m
then it will lead thru the installation process without any intervention, is it correct?? Jx to make sure is correct, thanx in advance.

[Bill McNAMARA_1 · Accepted solution]

no BO HW path
device files are only accessible when hp-ux has booted and mounted /

example (with disks but same applies for tape)

root @ cactus / # ioscan -fnkC disk
Class I H/W Path Driver S/W State H/W Type Description
======================================================================
disk 0 0/0/1/1.15.0 sdisk CLAIMED DEVICE SEAGATE ST318404LC
/dev/dsk/c1t15d0 /dev/rdsk/c1t15d0
disk 1 0/0/2/1.15.0 sdisk CLAIMED DEVICE SEAGATE ST318404LC
/dev/dsk/c3t15d0 /dev/rdsk/c3t15d0


The 0/0/1/1.15.0 correspons to disk with dev file /dev/dsk/c1t15d0

The BCH > PA command will return effectively the same as setboot:
root @ cactus / # setboot
Primary bootpath : 0/0/1/1.15.0
Alternate bootpath : 0/0/2/1.15.0

Autoboot is ON (enabled)
Autosearch is ON (enabled)

if I do
BCH> BO PRI
I boot from 0/0/1/1.15.0

It is the exact same as doing
BCH> BO 0/0/1/1.15.0


If I do BO ALT
it is the same as BO 0/0/2/1.15.0

If I do BO 0/0/2/1.2.3
If will attempt to boot from the device with the HW path 0/0/2/1.2.3

I have no idea what this is unless I have an ioscan -fnk

the BCH> SEA
will potentiall return all bootable devices (hardware)
if 0/0/2/1.2.3 is not amongst them, I possibly will not be able to boot from it.

If you've got an ignite server, you can
BO LAN.192.168.1.100 INSTALL
for example.

Think of the BCH like the BIOS of a PC selecting the boot sevices.. It is completely OS independant.

Later,
Bill

[JUN-Chan]

thanks a lot bill!!

[Rory R Hammond]

At the prompt ISL prompt
(the tape has to be inserted) do:
SEA IPL

The system will show you all the bootable devices. (it can take awhile)
for example on one of my machines

it will assoiate

P1 8/4.5 etc
P2 8/0.5 etc

The "P" value associated with sequential access media.
When set you can than
bo P1
or
bo P2
or
whatever device you want to use.
Rory