As a part of new features in Solaris 11, you can set a limit on the amount of space consumed by a specific group. The command to set quota on specific group is : # zfs set groupquota@[group]=[size] [dataset] Note : The groupquota value only applies to the owning group of a file as reflected […]
Archives for October 2015
CentOS / RHEL : How to identify/match LUN presented from SAN with underlying OS disk
The post mentions few ways to exactly identify/match the LUN presented from SAN with underlying OS disk. Method 1 Execute command below command to obtain Vendor, Model and Port, Channel, SCSI-ID, LUN # cat /proc/scsi/scsi Host: scsi2 Channel: 00 Id: 00 Lun: 29 Vendor: EMC Model: SYMMETRIX Rev: 5874 Type: Direct-Access ANSI SCSI revision: 05 […]
Replacing a Failed Mirror Disk in a Software RAID Array (mdadm)
The post describes the steps to replace a mirror disk in a software RAID array. In this example, we have used /dev/sda1 as the known good partition, and /dev/sdb1 as the suspect or failing partition. Before proceeding, it is recommended to backup the original disk. Before removing raid disks, please make sure you run the […]
CentOS / RHEL 5 : How to Configure kdump
Kdump is an advanced crash dumping mechanism. When enabled, the system is booted from the context of another kernel. This second kernel reserves a small amount of memory, and its only purpose is to capture the core dump image in case the system crashes. Since being able to analyze the core dump helps significantly to […]