Redhat Linux on A7V333 - Software RAID problem

From: Steve (steve_at_nospam-goofer.co.uk)
Date: 02/27/04 

Date: Fri, 27 Feb 2004 16:40:45 +0000 (UTC)

Hello, I'm looking for some experience or advice around Linux
software RAID problems on an Asus A7V333 motherboard. Specification
as follows:

Athlon XP2400 CPU
Asus A7V333 Motherboard (BIOS 1017)
768MB Memory
D-Link 100Mb/s NIC
Highpoint RocketRaid IDE Controller
2 x Seagate Barracuda 120GB
Redhat Fedora Core 1 (2.4.22-1.2166.nptl)

Disk layout is as follows:

Filesystem 1K-blocks Used Available Use% Mounted on
/dev/md1 16515968 620672 15056308 4% /
/dev/md0 1035596 45132 937856 5% /boot
/dev/md6 16515968 308336 15368644 2% /home
/dev/md7 8254136 2579996 5254852 33% /usr
/dev/md8 8254136 3916340 3918508 50% /usr/local
/dev/md5 16515968 540676 15136304 4% /var

RAID sets are mirrored across two physical disks attached to separate
IDE channels.

Initially the disks were attached to the motherboard IDE controller,
but problems were experienced with mirrors constantly breaking for no
obvious reasons. Replaced disks and installed a 4 channel Highpoint
PCI controller. Problem remained unchanged, mirrors break for at
least one volume per day. Resyncing the mirror with raidhotadd
always works with no errors.

Today I have systematically disabled everything on the motherboard
that isn’t required, such as all USB and Firewire controllers, Audio
controller, unused IDE channels, Serial and Parallel ports.

Interrupts currently appear as follows:

  0: 923219 XT-PIC timer
  1: 1142 XT-PIC keyboard
  2: 0 XT-PIC cascade
  8: 1 XT-PIC rtc
 10: 139214 XT-PIC eth0
 11: 1991396 XT-PIC ide2, ide3
 12: 160 XT-PIC PS/2 Mouse
 15: 1 XT-PIC ide1

The problem still remains unchanged, with a mirror breaking a few
hours after these latest configuration changes. If anyone has any
suggestions of how I can isolate and resolve the cause of this
problem, I would be really grateful.

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