<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <META NAME="Generator" CONTENT="MS Exchange Server version 5.5.2653.12"> <TITLE>Raid 5 Performance</TITLE> </HEAD> <BODY> Hi everyone, I have 4 identical disks that I have configured using the Linux Software raid. They are set-up in a raid 5 using a "chunksize" of 128 Kbytes as recommended in the Linux Software Raid HowTo. I could create an Ext3 file system directly over my raid 5 with the following parameters: chunksize=128KB, block size=4KB and stride=32. I think those parameters are the best for performance. (Any better suggestion would be appreciated !!!) My question is: Since I want to be able to create/resize many file systems (ext3, XFS ReiserFS) over the raid5, do I need to specified: "chunksize, stripe and stripesize", when performing the "lvcreate" command (the logical volume creation) or are those parameters used for backup and creating a raid 0 (stripe) ??? If I do need to specified those parameters, what would be the best values regarding performance of the raid 5 ??? Thanks in advance, Jean Aumont </BODY> </HTML>