Category: Nix

Please follow this, very nice explanation of boot process:

http://technochords.com/linux-booting-process-6-steps/

Hey Everyone,

I know sometime it seems a bit difficult to assign LUN’s to Solaris, here are my goto Steps:

1: Verify HBA port info to ensure assignment is correct:

# fcinfo hba-port -l

2:  find LUN

stmsboot –u

3: Format LUN

‘fdisk’ and ‘label’

4: Put the device names (ending with s2) into /etc/lvm/md.tab

5: Finish off with

metainit dnn

newfs -v /dev/md/rdsk/dnn

set entries in /etc/vfstab so a mount –a

 

and you are done.

Great place to Start:

https://learn.chef.io/learn-the-basics/ubuntu/

Hey Everyone,

Something from my old notes: Root mirroring in Solaris:

Root Mirroring

Root disk – c5t500000E010F08540d0
Mirror disk – c5t500000E010EFE890d0

Transfer the partition table
prtvtoc /dev/rdsk/c5t500000E010F08540d0s2 | fmthard -s – /dev/rdsk/c5t500000E010EFE890d0s2

Creation of meta databases
metadb -c 2 -a -f /dev/dsk/c5t500000E010F08540d0s7 /dev/dsk/c5t500000E010EFE890d0s7

Initialising the meta devices
metainit -f d10 1 1 c5t500000E010F08540d0s0
metainit d20 1 1 c5t500000E010EFE890d0s0
metainit -f d17 1 1 c5t500000E010F08540d0s7
metainit d27 1 1 c5t500000E010EFE890d0s7

Creating the mirrors
metainit -f d0 -m d10
metainit -f d7 -m d17

#Activate root meta
metaroot d0

Modify the vfstab for other metadevice entries for d7

Modify the system file

echo “set md:mirrored_root_flag=1” >> /etc/system

Modify the OBP boot device to boot with the mirror
eeprom “nvramrc=devalias mirror /scsi_vhci/ssd@g500000e010f08540:a devalias mirror-a /scsi_vhci/ssd@g500000e010f08541:a”
Install the boot block on the mirror disk
installboot /usr/platform/sun4u/lib/fs/ufs/bootblk /dev/rdsk/c5t500000E010EFE890d0s0

Attaching the mirror disk sub mirrors
metattach d0 d20
metattach d7 d27

metasync

———————–
Ruchir Gaur
“In Your life, There is no such a thing as you can do it or you can’t, but it’s a matter of ‘doing it or not doing it.’ “

Hey Everyone,

I know i am a Nix fanboy, but I have been managing a team which works 60+% on Wintel and I found how RAM hungry Windows is for real.

So back in days I use to have ubuntu Laptop with 2 GB RAM, and our VPN use to work only on windows. So I ended up using virtualbox on top of Ubuntu. Use to keep 1GM for host OS and give rest to Windows to ensure VM is working properly. Use to use all my application (Video, Music, Youtube etc) on ubuntu and work only on WinXP VM.

Now we shifted to Win 7. Condition with Ubuntu still seems to be same. 1 GB RAM usually work but 1GB RAM for Win7 is low. I had a desktop with AMD FX4000 (Quad Core) with 8GB RAM. I ran Oracle app (FI+HRMS) on it on top of RHEL. Worked great.

Now while my SCCM team tried to setup SCCM LAB, and they are complaining hosts with SSD+16GB RAM. Running 3-4 VM’s on top of Server 2008 R2. Where my desktop, same config system, I run Mint host+Virtual box, and is running (3 work VM of Win 7 + 1 Ubuntu Server + 1 CentOS 7 Server + 1 Oracle Solaris 11.2), and I have no complains.

I am amazed how resource hogging Windows Server and Windows Hyper-v is, and worst of all it’s not even Free. Where my Entire host is free+Update supported+ I can control VM’s with CLI (bandwidth friendly).

——–
Ruchir Gaur
“In Your life, There is no such a thing as you can do it or you can’t, but it’s a matter of ‘doing it or not doing it.’ “