07-16-2009
BIOS and Video RAM allocation
The blog you linked to noted that PCI-Express controllers can allocate 512 MB of address space. This might be what's happening, and the controller is allocating the upper part of the 32-bit memory address on the bus. Take out your video controller, and put in a generic PCI one (or use the motherboard's generic one??) In fact, take out ALL PCI-E controllers. Maybe the allocated memory will change.
The second thing to try -- not at the same time as above, please -- is specifying mem=4096M on the kernel line in grub. Go to grub.conf and change this, or on boot, append that option to the kernel-load line. Maybe the OS will magically remap whatever is eating the address space and see 4GB. Then, make sure you try to ALLOCATE that memory, to make sure it's actually usable. A simple perl script will do the job.
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AMR(4) BSD Kernel Interfaces Manual AMR(4)
NAME
amr -- AMI MegaRAID PCI-SCSI RAID driver
SYNOPSIS
amr* at pci? dev ? function ?
scsibus* at amr?
DESCRIPTION
The amr driver provides support for LSI (formerly American Megatrends) MegaRAID Express, Elite and Enterprise family RAID controllers for
SCSI and SATA, including models relabeled and sold by Dell, Hewlett-Packard, and Intel. Supported controllers include:
o MegaRAID 320-1
o MegaRAID 320-2
o MegaRAID Series 418
o MegaRAID Enterprise 1200 (Series 428)
o MegaRAID Enterprise 1300 (Series 434)
o MegaRAID Enterprise 1400 (Series 438)
o MegaRAID Enterprise 1500 (Series 467)
o MegaRAID Enterprise 1600 (Series 471)
o MegaRAID Elite 1500 (Series 467)
o MegaRAID Elite 1600 (Series 493)
o MegaRAID Express 100 (Series 466WS)
o MegaRAID Express 200 (Series 466)
o MegaRAID Express 300 (Series 490)
o LSI MegaRAID SCSI 320-0X, 320-2X, 320-4X
o LSI MegaRAID SCSI 320-1E, 320-2E
o LSI MegaRAID SATA 300-6x, 300-8x
o Dell PERC
o Dell PERC 2/SC
o Dell PERC 2/DC
o Dell PERC 4/Di
o Dell PERC 4/SC
o Dell PERC 4e/Si
o HP NetRAID-1/Si
o HP NetRAID-3/Si
o HP Embedded NetRAID
o Intel SRCU42X
o Intel SRCU42E
o Intel SRMOBU42E
o Intel SRCS28X
DIAGNOSTICS
Driver initialisation/shutdown phase
amr%d: memory window not available
amr%d: I/O window not available
The PCI BIOS did not allocate resources necessary for the correct operation of the controller. The driver cannot attach to this controller.
amr%d: busmaster bit not set, enabling
The PCI BIOS did not enable busmaster DMA, which is required for the correct operation of the controller. The driver has enabled this bit
and initialisation will proceed.
amr%d: can't allocate register window
amr%d: can't allocate interrupt
amr%d: can't set up interrupt
amr%d: can't allocate parent DMA tag
amr%d: can't allocate buffer DMA tag
amr%d: can't allocate scatter/gather DMA tag
amr%d: can't allocate s/g table
amr%d: can't allocate mailbox tag
amr%d: can't allocate mailbox memory
A resource allocation error occurred while initialising the driver; initialisation has failed and the driver will not attach to this con-
troller.
amr%d: can't obtain configuration data from controller
amr%d: can't obtain product data from controller
The driver was unable to obtain vital configuration data from the controller. Initialisation has failed and the driver will not attach to
this controller.
amr%d: can't establish configuration hook
amr%d: can't scan controller for drives
The scan for logical drives managed by the controller failed. No drives will be attached.
amr%d: device_add_child failed
amr%d: bus_generic_attach returned %d
Creation of the logical drive instances failed; attachment of one or more logical drives may have been aborted.
amr%d: flushing cache...
The controller cache is being flushed prior to shutdown or detach.
Operational diagnostics
amr%d: I/O beyond end of unit (%u,%d > %u)
A partitioning error or disk corruption has caused an I/O request beyond the end of the logical drive. This may also occur if FlexRAID Vir-
tual Sizing is enabled and an I/O operation is attempted on a portion of the virtual drive beyond the actual capacity available.
amr%d: polled command timeout
An initialisation command timed out. The initialisation process may fail as a result.
amr%d: bad slot %d completed
The controller reported completion of a command that the driver did not issue. This may result in data corruption, and suggests a hardware
or firmware problem with the system or controller.
amr%d: I/O error - %x
An I/O error has occurred.
SEE ALSO
cd(4), ch(4), intro(4), pci(4), scsi(4), sd(4), st(4), amrctl(8)
BSD
July 23, 2006 BSD