Tagged: solaris learning

20

Daddy, I have no friends and you are not playing with me.

My Three years old daughter told me these words!! My kid ( priyakari) started her playschool in Feb/13, She used to be a happy kid and very punctual to her school for the first 6 months. But suddenly, something changed in her schedule and she started...

6

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...

3

Enabling SVM in Failsafe and password recovery in Solaris.

In one of our previous post “Solaris Troubleshooting (Magic of Solaris 10) – Root Password Recovery for any Solaris 10 (without CD/DVD)”. We tried to show how to recover system’s root password in Failsafe mode without any media for OS having single disk (i.e native device,...

6

Hands on Lab – Replacing Failed Disks from ZFS Pools ( Simple / Mirrored / RaidZ )

    In our earlier post ( To get Started with ZFS ) , yogesh discussed about various ZFS pool and file system Operations. In this post I will be demonstrating the redundancy capability for different ZFS pools and also the recovery procedure from the disk failure scenarios....

5

System Controller battery (BATTERY at SC/BAT/V_BAT has exceeded low warning) failure in T-series servers.

System Controller battery (BATTERY at SC/BAT/V_BAT has exceeded low warning) failure in T-series servers. Many a times you will get a hardware error in /var/adm/messages (or at ALOM/LOM prompt, console messages) for SC battery failure, In this post I will explain the battery replacement procedure along...

10

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...

12

SSH Tunnels – System administrator’s friend or foe?

Let us assume that our system administrator Jack is supporting for a server environment in which a small set of servers  are located in DMZ (Demilitarized zone ) network . In order to connect any DMZ server Jack has to ssh from his machine (windows PC/Unix...

2

Understanding Network VLANs

Virtual LANs or VLANs are virtual separations within a switch that provide distinct logical LANs that each behave if there were configured on a separate physical switch. Some Important points about VLANS.  All the servers connected with in a VLAN will have same broadcasting domain, and...

14

Deployment and understanding of LDOMS (Logical Domains)

Deployment and understanding of LDOMS (Logical Domains): Ldom technology allows us to allocate a system’s various resources such as memory, CPUs and devices (I/O,Networl interfaces etc) into logical groupings and create multiple, discrete systems each having their own operating system, resources, and identity within a single...

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