From: Zsentient (zsentient@tnoc.5sigcmd.army.mil)
Date: Mon Apr 29 2002 - 09:52:33 EDT
Here are the answers I received, thanks to all:
ed.rolison@itc.alstom.com wrote:
>
> It depends.
> If you have the 64bit kernel packages available, then no.
> It should default to starting 64 bit. Reasons why it might not include
> the Openboot PROM version being too low, and a previous admin 'force'
> setting the boot-file= entry of the eeprom.
> The way to check if the 64bit components were installed is to check for
> 'SUNWcarx'. (pkginfo | grep SUNWcarx)
> if it exists, then the unless someone has manually installed it, the
> installation was 64bit.
> If it doesn't, then you may be able to get away with an upgrade install.
chakravarthi s viswanadh wrote:
>
> hi,,,
>
> I dont think you need to reinstall,,
>
> Just follow the steps given below
>
> Booting a 32 bit Solaris 8 Kernel
>
> Contents
> Introduction
> Booting the 32-bit Kernel
> Booting the 64-bit Kernel
>
> Introduction
> Solaris 8 will run with either a 64 bit kernel or a 32
> bit kernel. Gcom software prior to version 1.51 will
> not work on the 64 bit kernel. The earlier Gcom
> software uses a 32 bit driver and will not work with
> the 64 bit Solaris 8 kernel. Unfortunately, the
> Solaris 64 bit kernel will not generate an error
> message when it attempts to run a 32 bit driver. The
> driver simply does not function.
>
> Users of Gcom software version 1.51 or later do not
> have this problem. The later versions of the software
> will install and run correctly on either version of
> the kernel.
>
> It is possible to install the Gcom software on a
> machine running a 64 bit kernel and not notice
> anything until you try to run the Gcom software and it
> does not work.
>
> Back to Contents
>
> Booting the 32-bit Kernel
> Logged in as root, open a terminal window and type in
> the following:
>
> # su -
> # cd /
> # halt -y
>
> The machine will result in something similar to this:
>
> syncing file systems... done
> Program terminated
> {2} ok
>
> At this "ok" prompt type in the following:
>
> {2} ok boot kadb -D kernel/unix
> The machine will reboot at this point. Login as root
> after the reboot. Open up a terminal window and type
> in the following:
>
> # su -
> # cd /
> # eeprom boot-file=kernel/unix
> # reboot
>
> Now at this point, the Solaris 8 machine will be
> booting the 32 bit kernel by default.
>
> Back to Contents
>
> Booting the 64-bit Kernel
> To change back to the 64 bit kernel, perform the
> following operations.
>
> # su -
> # cd /
> # halt -y
>
> The machine will result in something similar to this:
>
> syncing file systems... done
> Program terminated
> {2} ok
>
> At this "ok" prompt type in the following:
>
> {2} ok boot kadb -D kernel/sparcv9/unix
> The machine will reboot at this point. Login as root
> after the reboot. Open up a terminal window and type
> in the following:
>
> # su -
> # cd /
> # eeprom boot-file=kernel/sparcv9/unix
> # reboot
>
> Now at this point, the Solaris 8 machine will be
> booting the 64 bit kernel by default.
Gaziz Nugmanov wrote:
>
> Hello zsentient,
>
> You do not need to resintall OS.
>
> I do not have the Sparc handy but the idea is: Just change boot-file value to 64 kernel file.
"Sherman, Gary" wrote:
>
> Anwser no need to install anything new. Here is a clip from the sunsolve site on how to run 64/32 bit.
>
> Hope this helps,
>
> Gary
>
> Q3. How can I tell if the system is already running the 64-bit kernel?
>
>A. Run the following command:
>
> $ /usr/bin/isainfo -kv
> 64-bit sparcv9 kernel modules
>
>The "64-bit sparcv9" output indicates the system is running the 64-bit Solaris kernel.
>
> =============================================================
> Q5. How do I configure the system to boot a 64-bit kernel?
>
> If the system's hardware and software support 64-bit, the system will by default boot the 64-bit kernel. The OBP boot-file parameter will by default be set to a null value. boot-file may also be set to "kernel/sparcv9/unix". Check the boot-file variable by using either the Solaris eeprom command or the OBP setenv command.
>
>eeprom: Login as root and use the eeprom command:
>
># /usr/sbin/eeprom | grep boot-file
>
>If the output from the eeprom command is either:
>
>boot-file: data not available
>or
>boot-file=kernel/sparcv9/unix
>
>then the system is configured to boot the 64-bit kernel. The boot-file does not have to be set to kernel/sparcv9/unix. A null value works.
>
>If the output from the eeprom command came back as:
>kernel/unix
>
>then the system is configured to boot a 32-bit kernel. Set the boot-file to either null or "kernel/sparcv9/unix"
>
>/usr/sbin/eeprom boot-file=""
> or
>/usr/sbin/eeprom boot-file="kernel/sparcv9/unix"
>
>setenv: From the system's OBP OK> prompt, use the printenv command to check the boot-file parameter and if necessary use the setenv or set-default commands to set the 64-bit
>kernel:
>
>OK> printenv boot-file
>OK> setenv boot-file kernel/sparcv9/unix
>or
>OK> set-default boot-file
>
> ============================================================================
> Q6. How do I configure the system to boot a 32-bit kernel?
>
> If the Ultra machine meets the hardware and software requirements for 64-bit boot, the boot-file variable must be set to kernel/unix. If not, then the machine will boot 64-bit. The boot-file variable can be set by either the Solaris eeprom command or the OBP setenv command.
>
>eeprom: Login as root and use the eeprom command to set the boot-file parameter to the 32-bit kernel:
>
># /usr/sbin/eeprom boot-file="kernel/unix"
>
>The next system reboot will boot the 32-bit kernel.
>
>setenv: From the system's OBP OK> prompt, use the setenv command to set the boot-file parameter to the 32-bit kernel:
>
>OK> setenv boot-file kernel/unix
"Hswe, Barbara" wrote:
>
> On solaris 8, type the following
> isainfo -kv to find out if you're using 32- or 64-bit.
> Then, to see if you CAN boot up in 64, type
> /usr/sbin/psrinfo -v
> and /usr/bin/pkginfo | grep "64-bit" to see if you have 64-bit already installed.
> Then if you want to boot up in 64-bit,
> /usr/sbin/eeprom | grep boot-file. What do you get? If you get /kernel/sparcv9/unix, then you are in 64-bit. If you get /kernel/unix, then you're booting 32.
>
> To boot up in 64,
> /usr/sbin/eeprom boot-file=""
> or
> /usr/sbin/eeprom boot-file kernel/sparcv9/unix
>
> from OBP,
> printenv boot-file
> setenv boot-file kernel/sparcv9/unix OR set-default boot-file
ingmar schoen wrote:
>
> Hi,
>
> No it does not need a reinstallation.
> If your open boot prom supports 64-bit features you just have to initialize that the 64-bit kernel will be
> loaded during the boot process.
>
> su - root
> cd /platform/platform-name/
> vi boot.conf
> remove the # at ALLOW_64BIT_KERNEL_ON_UltraSPARC_1_CPU=true
> reboot
>
> (to perform a flash prom update look here: AnswerBook2 - Flash PROM Update Supplement)
Mark Cohen wrote:
>
> Nope, just set the boot-file parameter in the eeprom to
> kernel/sparcv9/unix for 64bit and kernel/unix for 32bit
Jim Southerd wrote:
>
> If it was originaly installed with the 64bit enabled, no.
>
> You can check using isainfo
>
> >isainfo -kv
> 32-bit sparc kernel modules
>
> >isainfo -kv
> 64-bit sparcv9 kernel modules
"Vinarsky, Boris" wrote:
>
> No
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