I have included my original posting below. We continue to have problems
with a FireWire-connected hard drive when a PCI graphics cards is in use.
Additional testing does seem to confirm that there is a problem with PCI
graphics interfering with FireWire. My end user reports that he can
generate disk access errors by dragging a window to the PCI-connected
monitor while copying data to the FireWire drive.
Are there known PCI bus arbitration issues on the G5? I am posting here
as FireWire is being victimized, should I be cross-posting on some other
forum?
Thanks for your assistance,
Brad Justice
-------- Original Message --------
Subject: PCI graphics interferes with a FireWire connected hard drive
Date: Wed, 19 Sep 2007 17:25:55 -0700
From: Brad Justice <email@hidden>
To: email@hidden
I am investigating a problem reported by a customer booting off an
Oxford Semiconductor 924DSB-based hard drive enclosure. Host is
a Power Mac G5 running OS X 10.4.9. All works well unless he turns on
his 3rd monitor connected to an ATI Radeon 9200 PCI card. He then gets
massive disk errors (excerpt of error report below). This is 100%
reproducable on two identically equipped systems.
End user states that the problem occurs when connected by FW800 only and
does not reproduce using FW400. He has replaced the cables and
verified that the FireWire data cable is isolated from the monitor power
and data cables.
I suspect that Quartz Extreme support on the PCI card may be a factor.
Google research indicates a known problem with Quartz Extreme graphics
overwhelming the PCI bus, but I would expect the result to be a
performance problem rather than a total collapse of the file system.
Are there known problems with Quartz Extreme interfering with FireWire
support? Any recommendations for further investigation?
Thanks for your assistance,
Brad Justice
> System Info
> --------
> Model Name: Power Mac G5
> Model Identifier: PowerMac7,3
> Processor Name: PowerPC G5 (3.0)
> Total Number Of Cores: 2
> Processor Speed: 2.5 GHz
> L2 Cache (per CPU): 512 KB
> Memory: 3.5 GB
> Bus Speed: 1.25 GHz
> Boot ROM Version: 5.1.8f8
>
> Details of display adapters
> ---------------------------
> ATI Radeon 9200:
>
> Chipset Model: ATY,RV280
> Type: Display
> Bus: PCI
> Slot: SLOT-2
> VRAM (Total): 128 MB
> Vendor: ATI (0x1002)
> Device ID: 0x5961
> Revision ID: 0x0001
> ROM Revision: 113-A27502-120
> Displays:
> F-419:
> Resolution: 1280 x 1024 @ 60 Hz
> Depth: 32-bit Color
> Core Image: Supported
> Mirror: Off
> Online: Yes
> Quartz Extreme: Not Supported
> Display:
> Status: No display connected
>
> ----------------------------------------
> ATI Radeon 9600 XT:
>
> Chipset Model: ATY,RV360
> Type: Display
> Bus: AGP
> Slot: SLOT-1
> VRAM (Total): 128 MB
> Vendor: ATI (0x1002)
> Device ID: 0x4152
> Revision ID: 0x0000
> ROM Revision: 113-A13602-121
> Displays:
> F-419:
> Resolution: 1280 x 1024 @ 60 Hz
> Depth: 32-bit Color
> Core Image: Supported
> Main Display: Yes
> Mirror: Off
> Online: Yes
> Quartz Extreme: Supported
> Rotation: Supported
> F-419:
> Resolution: 1280 x 1024 @ 60 Hz
> Depth: 32-bit Color
> Core Image: Supported
> Mirror: Off
> Online: Yes
> Quartz Extreme: Supported
> Rotation: Supported
>
> Excerpt from error report
> -------------------------
> Verify and Repair disk “studio2 backup”
> Checking HFS Plus volume.
> Checking Extents Overflow file.
> Checking Catalog file.
> Invalid node structure_
> Rebuilding Catalog B-tree.
> Rechecking volume.
> Checking HFS Plus volume.
> Checking Extents Overflow file.
> Checking Catalog file.
> Missing thread record (id = 29)
> Incorrect block count for file console.log.9
> (It should be 1 instead of 0)
> Incorrect block count for file qmasterd.log
> (It should be 1 instead of 0)
> Incorrect number of thread records_
> Incorrect number of thread records_
> Checking multi-linked files.
> Checking Catalog hierarchy.
> Missing thread record (id = 21)
> Invalid directory item count_
> (It should be 0 instead of 6)
> Missing thread record (id = 19)
> ...
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