December 2003
Intermediate to advanced
458 pages
9h 3m
English
book
Deploying Linux on IBM eServer pSeries Clusters
by Dino Quintero, Prabhakar Attaluri, Tomas Baublys, Xinghong He, Chin Yau Lee, Francois Thomas
Content preview from Deploying Linux on IBM eServer pSeries Clusters
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3.7. Software mirroring and LVM
Linux LVM does not provide mirroring functionality by itself. However, it can use mirroring achieved through a hardware RAID controller or through software.
More information on Linux software RAID can be found at:
http://en.tldp.org/HOWTO/Software-RAID-HOWTO.html
Currently, Linux supports linear md devices, RAID0 (striping), RAID1 (mirroring), and RAID4 and RAID5. Because we can use LVM for linear device and striping, and do not have enough disks for RAID5, we are going to create RAID1, a software mirror.
3.7.1. Using YaST to create RAID
From the LVM point of view, a RAID device (/dev/md0) is just storage, so we need to create mirrored disks or partitions first and place an LVM volume group on it. This can be ...