Is there any configuration that could be made too make the LPAR booting process a little bit more faster than by design in Power?

The process before the actual operating system is booting takes a while (accourding to me).




------------------------------
Per Hillerström
------------------------------

#HMCandCMC

I see GRUB. So it's Linux.
in AIX booting time mostly depends on the number of the physical disk adapters, especially FC.
Physical = dedicates ti LPAR, not in VIOS.
Or, maybe there is a wrong bootlist and system tries to find the boot device.

------------------------------
Dmitry Mironov
------------------------------

Thanks for your reply!

I will have a look at the boot list and see if I missed anything.

------------------------------
Per Hillerström
------------------------------

Original Message:
Sent: Fri November 20, 2020 08:48 AM
From: Dmitry Mironov
Subject: LPAR Booting Process

I see GRUB. So it's Linux.
in AIX booting time mostly depends on the number of the physical disk adapters, especially FC.
Physical = dedicates ti LPAR, not in VIOS.
Or, maybe there is a wrong bootlist and system tries to find the boot device.

------------------------------
Dmitry Mironov
------------------------------

If this is SLES, my experience says that boot time is heavily dependent on the total number of paths to all LUNs and number of LVs on these LUNs (if LVM is in use).
Searching for root FS LV by UUID seems to be the reason (--set=root --hint='lvmid/XgDL6i-Cqxa-xYnE-1RYd-pfUH-DIOf-FYI4CH/YaHnGR-qR8Y-5q6G-yjIm-0GZq-xUbB-pNCee2').

------------------------------
Lech Szychowski
------------------------------

Original Message:
Sent: Mon November 23, 2020 01:13 AM
From: Per Hillerström
Subject: LPAR Booting Process

Thanks for your reply!

I will have a look at the boot list and see if I missed anything.

------------------------------
Per Hillerström
------------------------------


Original Message:
Sent: Fri November 20, 2020 08:48 AM
From: Dmitry Mironov
Subject: LPAR Booting Process

I see GRUB. So it's Linux.
in AIX booting time mostly depends on the number of the physical disk adapters, especially FC.
Physical = dedicates ti LPAR, not in VIOS.
Or, maybe there is a wrong bootlist and system tries to find the boot device.

------------------------------
Dmitry Mironov

That was Ubuntu.

------------------------------
Per Hillerström
------------------------------

Original Message:
Sent: Thu February 25, 2021 01:19 PM
From: Lech Szychowski
Subject: LPAR Booting Process

If this is SLES, my experience says that boot time is heavily dependent on the total number of paths to all LUNs and number of LVs on these LUNs (if LVM is in use).
Searching for root FS LV by UUID seems to be the reason (--set=root --hint='lvmid/XgDL6i-Cqxa-xYnE-1RYd-pfUH-DIOf-FYI4CH/YaHnGR-qR8Y-5q6G-yjIm-0GZq-xUbB-pNCee2').

------------------------------
Lech Szychowski
------------------------------


Original Message:
Sent: Mon November 23, 2020 01:13 AM
From: Per Hillerström
Subject: LPAR Booting Process

Thanks for your reply!

I will have a look at the boot list and see if I missed anything.

------------------------------
Per Hillerström


Original Message:
Sent: Fri November 20, 2020 08:48 AM
From: Dmitry Mironov
Subject: LPAR Booting Process

I see GRUB. So it's Linux.
in AIX booting time mostly depends on the number of the physical disk adapters, especially FC.
Physical = dedicates ti LPAR, not in VIOS.
Or, maybe there is a wrong bootlist and system tries to find the boot device.

------------------------------
Dmitry Mironov

Take a look at the grub configuration file and check how does grub find the FS to mount.
Unfortunately at the moment I do not have any Ubuntu around here, so I cannot do this myself.

------------------------------
Lech Szychowski
------------------------------

Original Message:
Sent: Fri February 26, 2021 12:56 AM
From: Per Hillerström
Subject: LPAR Booting Process

That was Ubuntu.

------------------------------
Per Hillerström
------------------------------


Original Message:
Sent: Thu February 25, 2021 01:19 PM
From: Lech Szychowski
Subject: LPAR Booting Process

If this is SLES, my experience says that boot time is heavily dependent on the total number of paths to all LUNs and number of LVs on these LUNs (if LVM is in use).
Searching for root FS LV by UUID seems to be the reason (--set=root --hint='lvmid/XgDL6i-Cqxa-xYnE-1RYd-pfUH-DIOf-FYI4CH/YaHnGR-qR8Y-5q6G-yjIm-0GZq-xUbB-pNCee2').

------------------------------
Lech Szychowski


Original Message:
Sent: Mon November 23, 2020 01:13 AM
From: Per Hillerström
Subject: LPAR Booting Process

Thanks for your reply!

I will have a look at the boot list and see if I missed anything.

------------------------------
Per Hillerström


Original Message:
Sent: Fri November 20, 2020 08:48 AM
From: Dmitry Mironov
Subject: LPAR Booting Process

I see GRUB. So it's Linux.
in AIX booting time mostly depends on the number of the physical disk adapters, especially FC.
Physical = dedicates ti LPAR, not in VIOS.
Or, maybe there is a wrong bootlist and system tries to find the boot device.

------------------------------
Dmitry Mironov