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My xm dmesg doesn't seem to have anything relevent. I looked at dmesg

# dmesg | grep ata

[    0.000000] Xen: 00000000ace8b000 - 00000000acf03000 (ACPI data)
[    0.000000]   #0 [0000000000 - 0000001000]   BIOS data page ==> [0000000000 - 0000001000]
[    8.042920] Memory: 30905224k/32932592k available (3152k kernel code, 1363016k absent, 664352k reserved, 2064k data, 604k init)
[    8.531342] Write protecting the kernel read-only data: 4336k
[    8.622027] libata version 3.00 loaded.
[    8.921169] ata1: SATA max UDMA/133 abar m2048@0xfbf45000 port 0xfbf45100 irq 3251
[    8.921171] ata2: SATA max UDMA/133 abar m2048@0xfbf45000 port 0xfbf45180 irq 3251
[    8.921174] ata3: SATA max UDMA/133 abar m2048@0xfbf45000 port 0xfbf45200 irq 3251
[    8.921176] ata4: SATA max UDMA/133 abar m2048@0xfbf45000 port 0xfbf45280 irq 3251
[    8.921178] ata5: SATA max UDMA/133 abar m2048@0xfbf45000 port 0xfbf45300 irq 3251
[    8.921180] ata6: SATA max UDMA/133 abar m2048@0xfbf45000 port 0xfbf45380 irq 3251
[    9.240537] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[    9.241673] ata1.00: ATA-8: Hitachi HDT721010SLA360, ST6OA31B, max UDMA/133
[    9.241680] ata1.00: 1953525168 sectors, multi 16: LBA48 NCQ (depth 31/32), AA
[    9.243056] ata1.00: configured for UDMA/133
[    9.556373] ata2: SATA link down (SStatus 0 SControl 300)
[    9.880368] ata3: SATA link down (SStatus 0 SControl 300)
[   10.200369] ata4: SATA link down (SStatus 0 SControl 300)
[   10.520367] ata5: SATA link down (SStatus 0 SControl 300)
[   10.840368] ata6: SATA link down (SStatus 0 SControl 300)
[   11.407364] EXT4-fs (dm-0): mounted filesystem with ordered data mode
[   15.594713] EXT4-fs (sda1): mounted filesystem with ordered data mode
[ 1451.571392] EXT4-fs (dm-4): mounted filesystem with ordered data mode

The "SATA link down", looks concerning, but also looks different from the errors you link to. Disabling VT-d isn't really viable for me since I want to run an HVM domU. I could always buy another sata card, but I would like to use the ports on the motherboard if I can.

From: Casey DeLorme [cdelorme@xxxxxxxxx]
Sent: Sunday, December 09, 2012 9:37 PM
To: Daniel Shub
Cc: xen-users@xxxxxxxxxxxxx
Subject: Re: [Xen-users] Problem with secondary sata controller

It could be unrelated, but check your `dmesg` or `xl dmesg` for "DMA Read" errors.

If you find it you may have to search for additional information:

https://lists.linux-foundation.org/pipermail/iommu/2012-January/003552.html

It's a bug with certain SATA controllers, I have experienced it with both Marvell and ASMedia controllers.

On Sun, Dec 9, 2012 at 4:20 PM, Daniel Shub <Daniel.Shub@xxxxxxxxxxxxxxxx> wrote:

I am having problems getting my 64-bit Debian Squeeze (Xen version 4.0, Linux Kernel 2.6.32) dom0 to recognize a harddrive connected to a secondary sata controller. My motherboard is a Gigabyte GA-X79-UP4 and has two sata controllers. The first is controlled by an Intel X79 chipset and the second is controlled by a Marvell 88SE9172 chip. During the initial install of Debian everything is fine and I can see harddrives attached to either controller. If I boot Xen from grub, I cannot see the harddrives on the Marvell chip, if I just boot the stock Debian kernel I can see the harddrives. The Marvell controller shows up in lspci. I tried to do a pci passthrough of the Marvell controller to both a PV and a HVM domU, but it didn’t work.
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