Selecting virtual SCSI Controllers for Disks (VMware VM)

Selecting virtual SCSI Controllers for Disks (VMware VM)

Introduction- To access virtual disks, a virtual machine uses virtual SCSI controllers. Each virtual disk that a virtual machine can access through one of the virtual SCSI controllers resides in the VMFS datastore, NFS-based datastore, or on a raw disk. The choice of SCSI controller does not affect whether your virtual disk is an IDE …

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NetApp Product Overview

NetApp Product Overview

Introduction – NetApp is leading provider of high speed/performance SAN/NAS storage. I’m working on various NetApp Products since past 5+ yrs as Storage Admin.  This article gives overview of NetApp Storage products and Technologies… * Data ONTAP – NetApp Data ONTAP is Operating System (OS) running on NetApp Storage. “Data ONTAP” supports Cluster Mode and …

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How to create volume in NetApp and how to NFS export

How to create volume in NetApp and how to NFS export

Introduction– NetApp Storage supports multiple protocols to access data like NFS, CIFS(SMB), FTP and WebDav etc. This article explains how to create NetApp Volume and export using NFS. Step 1) Check Aggr Space and Ping Storage connectivity from server (where u will be mounting volume) – # ping -c5 -M do -s 8972 192.168.0.10 netapp-filer1> …

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How to Import/Export GNU GPG Keys

How to Import/Export GNU GPG Keys

How to Import/Export GPG Keys- Step 1) List GPG Keys – [root@test-host ~]# gpg -kv /root/.gnupg/pubring.gpg ———————— pub  1024D/F9F17DC2 2012-09-27 Test GPG key (Created by Arun) <arun@my.com> sub  2048g/F173E2CC 2012-09-27 pub  1024D/5A6C12B1 2013-02-25 Test2 <abagul@my.com> sub  1024g/CA7BF220 2013-02-25 Step 2) How to Export GPG Key – [root@test-host ~]# gpg –armor –export  –output /tmp/mykey.pub -r ‘5A6C12B1’ …

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Choosing a NIC (Network Adapter) for VM in Vmware ESXi environment

Choosing a NIC (Network Adapter) for VM in Vmware ESXi environment

Introduction- NIC types available for VM  are depends on VM Hardware version and Guest OS (Operating System). When you configure a virtual machine, you can add network adapters (NICs) and specify the adapter type… The following NIC types widely used: E1000 – Emulated version of the Intel 82545EM Gigabit Ethernet NIC, with drivers available in …

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VMware Virtual Machine(VM) Configuration File types

VMware Virtual Machine(VM) Configuration File types

Introduction– When you create VM (Virtual Machine) in VMWare based Virtualization platform. VMware creates  few VM configuration files in  folder with VM name in Datastore (Local Storage or NFS/SAN). Please find the table which describes files types in vmware…   File Usage File Description File Format .vmx .vmname.vmx Virtual machine configuration file. ASCII .vmxf vmname.vmxf …

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VMware ESXi Commands

VMware ESXi Commands

Introduction– Sometime we need to login to Esxi server to check hardware/networking and performance/stats. Sharing few important ESXi commands.. a)  ESXi NIC List ~ # esxcfg-nics  –list Name    PCI           Driver      Link Speed    Duplex MAC Address       MTU    Description vmnic0  0000:01:00.00 tg3   Up   1000Mbps  Full  XX:10:55:DD:CC:XX 1500   Broadcom BCM5720 Gigabit Ethernet vmnic1  0000:01:00.01 tg3   Up   1000Mbps  Full  …

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Log rotation in VMWare ESXi

Log rotation in VMWare ESXi

Introduction– Last month, while working on ESXi5.1 disconnect issue. we analyzed esxi logs for past 3/4 months. Just sharing information related to ESXi log rotation policy.. /var/log # esxcli system syslog config get Default Rotation Size: 1024 Default Rotations: 8 Log Output: /scratch/log Log To Unique Subdirectory: false Remote Host: <none> /var/log # cd /scratch/log …

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Difference between (Extended) ext2/3 and ext4 File System

Difference between (Extended) ext2/3 and ext4 File System

Difference between (Extended) ext2/3 and ext4 File System * Ext2 -It was introduced in 1993. Developed by Remy Card. -ext2 stands for second extended file system. -This was developed to overcome the limitation of the original ext file system. -ext2 does not have journaling feature. -ext2 is recommended for flash drives, usb drives etc -Maximum …

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