>From what I can tell the issue here lies with mdadm and/or its interaction with CentOS 5.2. Let me first go over the configuration of both systems. System 1 - CentOS 5.2 x86_64 2x Seagate 7200.9 160GB in RAID 1 2x Seagate 7200.10 320GB in RAID 1 3x Hitachi Deskstar 7K1000 1TB in RAID 5 All attached to Supermicro LSI 1068 PCI Express controller System 2 - CentOS 5.2 x86 1x Non Raid System Drive 2x Hitachi Deskstart 7K1000 1TB in RAID 1 Attached to onboard ICH controller Both systems exhibit the same issues on the RAID 1 drives. That rules out the drive brand and controller card. During any IO intensive process the IO wait will raise and the system load will climb. I've had the IO wait as high as 70% and the load at 13+ while migrating a vmdk file with vmware-vdiskmanager. You can easily recreate the issue with bonnie++. I can perform the same disk intensive operation on the RAID 5 array with almost no io wait or load. What is the deal with this? Is there something I can tweak? -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
