Archive for the ‘RAID’ Category

Hot Adding a SCSI Device

July 11th, 2008 No comments

When hot adding a SCSI device, such as a hard drive, you might have noticed that it doesn’t show in /dev. You can either reboot, which defeats the purpose of hot adding the device, or notify Linux to rescan the SCSI bus. Read more…

Categories: Firewalls, Linux, RAID, Windows Tags:

Useful Mdadm Commands

December 16th, 2007 1 comment

Below is a collection of commands for mdadm that I have found useful. Use these at your own risk. Read more…

Categories: Linux, RAID Tags:

RAID Explained

December 16th, 2007 No comments

RAID, which stands for “redundant array of independent” disks provides a way to group disks into one volume and/or provide fault tolerance. There are three way to implement RAID: hardware, a combination of hardware/software, and software only. Read more…

Categories: Linux, RAID Tags:

Installing Debian/Ubuntu on an Existing RAID/LVM

December 13th, 2007 No comments

I like to test all the possible scenarios before putting a server into production. One of these tests was whether I could reinstall linux without disturbing the RAID arrays. Unfortunately the Debian and Ubuntu installers do not make this easy. When you reach the partitioning stage it will just show you the physical drives with the linux raid partitions and not the md devices. Here are the steps that worked for me. Read more…

Categories: Linux, RAID Tags: