Re: RAID 5 performance issue.

[Andrew Clayton <andrew@digital-domain.net>]

On Thu, 4 Oct 2007 10:39:09 -0400 (EDT), Justin Piszcz wrote:


> What type (make/model) of the drives?

The drives are 250GB  Hitachi Deskstar 7K250 series ATA-6 UDMA/100

> True, the controller may not be able to do it either.
> 
> What types of disks/controllers again?

The RAID disks are currently connected to a Silicon Image PCI card are
configured as a software RAID 5

03:04.0 RAID bus controller: Silicon Image, Inc. SiI 3124 PCI-X Serial ATA Controller (rev 02)
        Subsystem: Silicon Image, Inc. Unknown device 7124
        Flags: bus master, stepping, 66MHz, medium devsel, latency 64, IRQ 16
        Memory at feafec00 (64-bit, non-prefetchable) [size=128]
        Memory at feaf0000 (64-bit, non-prefetchable) [size=32K]
        I/O ports at bc00 [size=16]
        Expansion ROM at fea00000 [disabled] [size=512K]
        Capabilities: [64] Power Management version 2
        Capabilities: [40] PCI-X non-bridge device
        Capabilities: [54] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-


The problem originated  when the disks where connected to the on board
Silicon Image 3114 controller.

> Justin.

Andrew