Category: Unix Experts

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Bash scripting – Nesting loops

A loop statement can use any other type of command within the loop, including other loop commands. This is called a nested loop. Care should be taken when using nested loops, because you’re performing an iteration within an iteration, which multiplies the number of times commands...

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Part 1 – Mastering GREP – Introduction and Invoking

Introduction to Grep `grep’ searches input files for lines containing a match to a given pattern list. When it finds a match in a line, it copies the line to standard output (by default), or produces whatever other sort of output you have requested with options....

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Linux Admin Reference – Device Mapper Multipath ( DM-Multipath) Configuration – Red Hat Enterprise Linux 6

In Enterprise Linux Environment, External storage often permits devices to be accessed by multiple physical paths. This improves redundancy and availability. SAN environment Red Hat Enterprise Linux provides the device-mapper-multipath component to manage multipath capable storage and to present multipath devices to applications running on the...

3

Solaris10: San/SAS/MPXIO/STMS config files

With the release of Solaris 10 Operating System (OS), the configuration of Storage Area Network (SAN), Serial Attached SCSI (SAS) attached devices, and turning on STMS/MPXIO has changed. This Post details the new ways devices are brought into the operating system, and their configuration files. The...

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Solaris Storage Configuration – EMC VMAX + POWERPATH / MPxIO + VxVM

To simplify the Storage addition operation, i just made a quick cheat sheet for your easy understanding and  quick reference, since this information cannot be presented as html format i will be sharing it in image format, which you can print and use it as desk...

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Solaris Troubleshooting : map the Physical Device(s) from an EMC PowerPath Pseudo Device seen in “format” output

Under normal circumstances, an administrator could use the EMC PowerPath commands to obtain this information (ie. the powermt command). Sometimes this output is not always available, especially since Sun Explorer script does not collect it.

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