Re: hda: set_drive_speed_status: status=0x51 { DriveReady SeekComplete Error }

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Hello.

John Sigler wrote:

When my system boots, I get several set_drive_speed_status errors.
(Please see attached dmesg output.)

Can someone explain what they mean? How do I get rid of them?

IDE code attempts to autotune PIO mode and fails at that because your device is too old (or its manufacturer was too lazy) to support ATA-2 (or EIDE from marketing PoV) is its full glory.

Is there something I need to set in the config? or something I should not have set?

No, it just means that the IDE code is *too young* to support such pre-EIDE devices. :-D

Bonus question: is there some way to turn on DMA for hda?

Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
VP_IDE: IDE controller at PCI slot 0000:00:07.1
VP_IDE: chipset revision 6
VP_IDE: not 100% native mode: will probe irqs later
VP_IDE: VIA vt82c686b (rev 40) IDE UDMA100 controller on pci0000:00:07.1
    ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hda:pio, hdb:pio
    ide1: BM-DMA at 0xd008-0xd00f, BIOS settings: hdc:pio, hdd:pio
Probing IDE interface ide0...
hda: PQI IDE DiskOnModule, ATA DISK drive
hda: set_drive_speed_status: status=0x51 { DriveReady SeekComplete Error }
hda: set_drive_speed_status: error=0x04 { DriveStatusError }
hda: set_drive_speed_status: status=0x51 { DriveReady SeekComplete Error }
hda: set_drive_speed_status: error=0x04 { DriveStatusError }

That means that you've managed to find pre-EIDE/ATA hardware which doesn't support setting arbitrary PIO modes. What's funny is that resently being discussed here, so expect a patch RSN. :-)

ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
Probing IDE interface ide1...
hda: max request size: 128KiB
hda: 128000 sectors (65 MB) w/1KiB Cache, CHS=500/8/32
 hda: hda1 hda2

# hdparm -v /dev/hda

/dev/hda:
 multcount     =  0 (off)
 IO_support    =  1 (32-bit)
 unmaskirq     =  1 (on)
 using_dma     =  0 (off)
 keepsettings  =  0 (off)
 readonly      =  0 (off)
 readahead     = 256 (on)
 geometry      = 500/8/32, sectors = 128000, start = 0

   Oh, interesting geometery, and the size too. :-)

# hdparm -I /dev/hda

/dev/hda:

ATA device, with non-removable media
        Model Number:       PQI IDE DiskOnModule

   That explains it. :-)

        Serial Number:      DOM6B00011677
        Firmware Revision:  ra03.00e
Standards:
        Likely used: 1
Configuration:
        hard sectored
        not MFM encoded
        head switch time > 15us
        fixed drive
        disk xfer rate > 5Mbs
        Logical         max     current
        cylinders       500     500
        heads           8       8
        sectors/track   32      32
        --
        bytes/track: 0  bytes/sector: 528
        CHS current addressable sectors:     128000
        LBA    user addressable sectors:     128000
        device size with M = 1024*1024:          62 MBytes
        device size with M = 1000*1000:          65 MBytes
Capabilities:
        LBA, IORDY not likely
        Buffer type: 0002: dual port, multi-sector
        Buffer size: 1.0kB      bytes avail on r/w long: 4
        Cannot perform double-word IO

That's generally not the device task (although there probably were IDE devices with 32-bit data bus?.. :-O

        R/W multiple sector transfer: Max = 1   Current = 0
        DMA: not supported
        PIO: pio0 pio1 pio2

[the rest of logs didn't show anything particurarly interesting]

MBR, Sergei
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