As part of regular System Admin task we were asked to configure new storage to an existing sybase server without disturbing the existing storage and expecting no downtime for the existing production server. All necessary storage LUNS were already allocated by the Storage team as mentioned...
Linux Admin / Linux LVM / Redhat Enterprise Linux 6 / Rhel6 Storage
by Ramdev · Published July 1, 2021
In this post, you can find the procedure to recover a deleted logical volume, from the linux server with below configuration. Server Name : GURKULRHEL Version : Redhat Enterprise Linux 6 LVM Configuraiton: VG NAME...
During the last weekend, I have noticed one of the interesting task performed by one of my collegue as part of the storage migration, i have captured the logs from his task. And the actual scenario is : In any Storage migration ( with Host Side...
Linux Admin / Linux Disk Management / Linux LVM / Redhat Enterprise Linux 6 / Rhel6 Storage / Storage Configs for Unixadmin / Storage Migrations / Unix Intermediate
by Ramdev · Published March 25, 2021
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...
HP Hardware / Information Centers / Linux Admin / Linux Booting / Linux Disk Management / Linux LVM / Linux Networking / Linux Performance / Linux Troubleshooting / Linux YUM/RPM / Performance Analysis / Redhat Clusters / Redhat Enterprise Linux 6 / Redhat Linux Kernel / RHEL Commands / RHEL Configuration Files / RHEL LDAP / RHEL Migrations / Rhel6 Storage / RHEL7 / Site Reference / Sticky posts / Ubuntu
by Ramdev · Published September 1, 2015 · Last modified September 19, 2019
Booting Tasks Read – Unexpected Server Reboots of RHEL servers on HP Read – Linux Admin Reference – RedHat Linux Grub Loader Storage Responsibilities Read – Understand Device Mapper and DM-Multipath Read – Identifying Disk Errors in Linux Read – Identify if linux was installed on...
Linux Admin / Linux Disk Management / Linux LVM / Storage Configs for Unixadmin / Storage Migrations / Unix Intermediate
by Ramdev · Published June 16, 2014 · Last modified August 6, 2016
Sudo is different from the su command and is more flexible and more secure. The sudo command allows users to do tasks on a Red Hat Enterprise Linux system as another user. One significant advantage is that it can log usage. By default the program saves...
Linux Admin / Linux Disk Management / Linux LVM / Unix Intermediate
by Ramdev · Published May 26, 2014 · Last modified July 23, 2016
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...
Linux Admin / Linux Disk Management / Linux LVM / Redhat Enterprise Linux 6 / Rhel6 Storage / Unix Intermediate
by Ramdev · Published April 19, 2013 · Last modified August 6, 2016
This is second post from the ISCSI administration series ( you can refer the first post here RHEL 6 – ISCSI Administration Series – Configuring ISCSI Server and Client ) . In this post, I will be showing you an hands-on exercise to expand a ISCSI LUN which is already...
Linux LVM / Storage Migrations / Unix Intermediate / VxVM Learning / VxVM Migrations / VxVM Troubleshooting
by Ramdev · Published December 26, 2012 · Last modified August 22, 2015
Storage Operation VXVM RHEL LVM2 Installation and Configuration Installed using Veritas installer Installed as part of standard build via rpm Scan for new devices # vxdctl enable # vgscan Print list of volumes # vxprint -v # lvdisplay -C Print current config (detailed) # vxdg list # vgdisplay list volume...
EMail Posts / Linux Admin / Linux LVM / Unix Intermediate
by Ramdev · Published November 14, 2012 · Last modified July 23, 2016
1. How do I reduce LVM logical voulme in Red Hat Enterprise linux? First of all make sure to have sufficient disk space available before reducing logical volume (otherwise it would result in data loss). Also, make sure to have valid data backup before going forward...
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