Linux server does not responding to application queries. The performance is too low. Underlying disks or SAN LUN’s are normal. From top output found the I/O wait is too high. But there is no I/O intensive tasks are running. While, How to fix high I/O wait issue? Continue reading “Linux – How to fix high I/O wait issue?”
In my previous article explained about how to delete disk from ASM library. In this article will learn to delete the LUN and remove traces from server. This article applicable for deleting ASM disk, standard partitioned disk and LVM physical volume. These steps works well for Redhat and SUSE. Continue reading “Linux – delete the LUN and remove traces from OS”
ASM is the volume manager and filesystem for Oracle database. At one point of time may need to drop the disks. The procedure is quite different compare to Linux LVM disks. How to delete Oracle ASM disk in RHEL 5 and RHEL 4? Continue reading “How to delete Oracle ASM Disk in RHEL 5 & 4”
On AIX platform, How to install awscli only to current user? In case non-privileged user, Is it possible for the user to do without sudo privileges?
The answer is big fat YES. It is absolutely possible. The AWS documentation may work well for other distribution. But for AIX, it requires to pass few extra arguments along with pip installer. Continue reading “AIX – Install awscli exclusively to current user”
How to get hard disk details such as serial number in HP UX?
Use the command “cstm” to pull the hardware information in HP UX. The same can be used to collect hard disk details such as serial number, make, model and firmware rev of hard disk. The disk serial number mostly needed when replacing faulty hard disks. Continue reading “HP UX – Get hard disk hardware details”
How to upgrade FC HBA firmware and drivers properly?
We were in progress of upgrading IBM SAN SVC version. One of the prerequisite is latest recommended HBA firmware and driver level on host systems. Downloaded and installed the latest firmware & drivers from IBM website. But found server still uses old firmware even after reboot. How to make the new firmware effective? Continue reading “Linux – upgraded HBA firmware not effective”
This simple script gives you the list of FC HBA detected in system. It query the sysfs filesystem to get the available fibre channel HBA. Script works for most of the Linux flavors, as specially any of Redhat, SUSE, Fedora and Centos distributions. Continue reading “Linux get the list of FC HBA’s and WWPN”
How to create new filesystem in AIX from scratch? This post let help you create new filesystem in just 8 steps. Believe me it is much easier than Linux. Continue reading “AIX create new filesystem in 8 steps”
The P5/6/7 hardware loaded with AIX. How to check the FC HBA status?
This command lists all devices available in AIX system. Continue reading “AIX check the HBA status”
ERROR: Password cannot be changed. Reason: password lifetime has passed.
To get rid of this error. First unlock the account. Continue reading “How to reset password in HP UX?”