Category: Blog for Unix Admin

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Hands on Lab – Replacing Failed Disks from ZFS Pools ( RaidZ2 / RaidZ3 ) – Part2

    In my earlier hands on lab post ( Hands on Lab – Replacing Failed Disks from ZFS Pools ( Simple / Mirrored / RaidZ )). I have explained the disk failure scenarios for ZPOOL  mirror and RaidZ volumes, and this post is just continuation to that...

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Solaris Network Performance Tuning : know about TCP window size

Our Unixadmin, John from xyz company,  recently upgraded one of his server’s network interface card  from the old one with 100MB speed to a new one with 10Gig speed , and the reason is to improve the speed for the backup of the server. After the NIC Upgrade  john found that the server network...

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Volume manager Migration from LVM to VxVM in Linux – Part 1

  We all know that storage is key requirement for any server environment and the requirement for storage is always dynamic in nature. When we talk about the cost, providing highly redundant storage to each server is most expensive task for any organization and no company...

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Unix Quick Reference : ILOM ( Integrated Lights out Manager) Command Line

The X4000 Family implements the ILOM – Integrated Lights Out Manager.  This is a combination of dedicated hardware and supporting software. The Sun Fire X64 family of servers implement a technology called ILOM – Integrated Lights Out Manager where available. This is a combination of dedicated hardware...

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Linux Network Troubleshooting

Network connection problems include slow connections, as well as complete loss of connectivity. Factors that may cause slow connectivity include incorrectly configured domain name system (DNS) settings, inefficiently configured routing tables, inferior cabling, overloaded servers, and network congestion. The same set of factors, as well as...

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Solaris SVM : Repartitioning Drives for Operating System Upgrade

Below instructions useful to deal with a common issue in upgrading an operating system (OS) where the existing partitions, which were fine for the operating system (OS) prior to upgrading, are not large enough to hold the same file systems of the new OS. As a example, one of...

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Solaris Troubleshooting : Disk i/o Performance Issues

This post is to highlight some of the steps needed to diagnose if an issue is in fact a disk performance issue or not.  And if it is, what data will be collected to help diagnose the issue. Please note that performance in general is not an...

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Configuring Solaris 10 host with SAN storage ( EMC Clariion )

Configuring SAN storage is usual task of system administration in Enterprise network environment. And Of course  there is lot of  engineering activity involved in certifying a process , that defines the guidelines on what hardware / software matrix should be used for stabled operating environment. In this...

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