Re: DMA Errors from SATA Controller with 4G Memory Remapping Enabled

[Robert Hancock]

On 11/13/2012 04:08 PM, Dimitar Popov wrote:
> Hi all,
>
> I have an old computer with motherboard ASUS SK8N with AMD Opteron 148 and 4
> GiB of DDR400. There is an onboard SATA Promise RAID controller working in IDE
> mode (i.e. not as RAID controller) with 2 SATA disks. In order to use all 4
> GiB RAM I need to enable the "4G Memory Remapping" option from the BIOS.
> However, if I do that I receive the following errors:
>
> ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> ata2.00: failed command: WRITE DMA
> [136B blob data]
> ata2.00: status: { DRDY }
> ata2: hard resetting link
> ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
> ata2.00: configured for UDMA/133
> ata2.00: device reported invalid CHS sector 0
> sd 1:0:0:0: [sdb]
> Result: hostbyte=0x00 driverbyte=0x08
> sd 1:0:0:0: [sdb]
> Sense Key : 0xb [current] [descriptor]
> Descriptor sense data with sense descriptors (in hex):
>          72 0b 00 00 00 00 00 0c 00 0a 80 00 00 00 00 00
>          00 00 00 00
> sd 1:0:0:0: [sdb]
> ASC=0x0 ASCQ=0x0
> sd 1:0:0:0: [sdb] CDB:
> cdb[0]=0x2a: 2a 00 00 2a 63 f0 00 00 08 00
> end_request: I/O error, dev sdb, sector 2778096
> btrfs: bdev /dev/sdb6 errs: wr 1, rd 0, flush 0, corrupt 0, gen 0
> ata2: EH complete
>
> I don't know if it is a bug in the BIOS or a kernel bug. Here some info (I'll
> provide further info, if needed):

It seems like there are some lines missing from this output. Can you 
provide the full dmesg output from bootup?

You also might want to check for a BIOS update.

> $ uname -a
> Linux darkstar 3.6.6-1-ARCH #1 SMP PREEMPT Mon Nov 5 11:57:22 CET 2012 x86_64
> GNU/Linux
>
> 01:08.0 RAID bus controller: Promise Technology, Inc. PDC20378 (FastTrak
> 378/SATA 378) (rev 02)
>          Subsystem: ASUSTeK Computer Inc. K8V Deluxe/PC-DL Deluxe motherboard
>          Flags: bus master, 66MHz, medium devsel, latency 96, IRQ 19
>          I/O ports at dc00 [size=64]
>          I/O ports at d800 [size=16]
>          I/O ports at d400 [size=128]
>          Memory at fa9ff000 (32-bit, non-prefetchable) [size=4K]
>          Memory at fa9c0000 (32-bit, non-prefetchable) [size=128K]
>          Capabilities: [60] Power Management version 2
>          Kernel driver in use: sata_promise
>
> Thank you in advance!
>
> Regards,
> Dimitar

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