> I'm using an nforce 4 board with the following ata devices:
> channel1, master: disk IC35L120AVVA07-0 120gig
> channel1, slave: dvd HITACHI DVD-ROM GD-7500
> channel2, master: disk IC35L120AVV207-0 120gig
> channel2, slave: cdrom LITE-ON LTR-40125S
>
> I've made sure the cable is 80-pin and tried replacing it with a
> similar cable. Only channel2 gets UDMA33, channel1 works fine.
> The change was introduced in 2.6.24-rc1 but also exists in 2.6.24-rc2.
> It probably have something to do with the new function
> ata_acpi_cbl_80wire in drivers/ata/libata-acpi.c. I've added a return
> 1; at the beginning of that function as a quick workaround for the
> problem.
>
> The non libata driver prints the waring "BIOS didn't set the cable
> bits correctly. Enabling workaround" which is probably related to
> this. However I am using the latest bios.
>
> The thread "2.6.24-rc1: pata_acpi fails to activate DMA for DVD-ROM on
> ALi M5229 secondary channel" might be related to this.
>
> Another thing that might be related is that I get bad throughput on
> the second channel disk even with my workaround but this also occurs
> with older kernels and with the non libata driver.
>
>
> # hdparm -tT /dev/sdb
>
> /dev/sdb:
> Timing cached reads: 1346 MB in 2.00 seconds = 673.35 MB/sec
> Timing buffered disk reads: 138 MB in 3.04 seconds = 45.40 MB/sec
> # hdparm -tT /dev/sdc
>
> /dev/sdc:
> Timing cached reads: 1392 MB in 2.00 seconds = 696.02 MB/sec
> Timing buffered disk reads: 34 MB in 3.39 seconds = 10.02 MB/sec
> # hdparm -I /dev/sdb
>
> /dev/sdb:
>
> ATA device, with non-removable media
> powers-up in standby; SET FEATURES subcmd spins-up.
> Model Number: IC35L120AVVA07-0
> Serial Number: VNC602A6G5LH4A
> Firmware Revision: VA6OA52A
> Standards:
> Used: ATA/ATAPI-5 T13 1321D revision 1
> Supported: 5 4 3 & some of 6
> Configuration:
> Logical max current
> cylinders 16383 65535
> heads 16 16
> sectors/track 63 0
> --
> CHS current addressable sectors: 0
> LBA user addressable sectors: 241254720
> device size with M = 1024*1024: 117800 MBytes
> device size with M = 1000*1000: 123522 MBytes (123 GB)
> Capabilities:
> LBA, IORDY(can be disabled)
> bytes avail on r/w long: 52 Queue depth: 32
> Standby timer values: spec'd by Standard, no device specific minimum
> R/W multiple sector transfer: Max = 16 Current = 1
> Advanced power management level: unknown setting (0x0000)
> Recommended acoustic management value: 128, current value: 254
> DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
> Cycle time: min=120ns recommended=120ns
> PIO: pio0 pio1 pio2 pio3 pio4
> Cycle time: no flow control=240ns IORDY flow control=120ns
> Commands/features:
> Enabled Supported:
> * SMART feature set
> Security Mode feature set
> * Power Management feature set
> * Write cache
> * Look-ahead
> Release interrupt
> * Host Protected Area feature set
> * WRITE_BUFFER command
> * READ_BUFFER command
> * NOP cmd
> * READ/WRITE_DMA_QUEUED
> Advanced Power Management feature set
> Power-Up In Standby feature set
> SET_FEATURES required to spinup after power up
> Address Offset Reserved Area Boot
> SET_MAX security extension
> Automatic Acoustic Management feature set
> * Device Configuration Overlay feature set
> * Mandatory FLUSH_CACHE
> Security:
> Master password revision code = 65534
> supported
> not enabled
> not locked
> not frozen
> not expired: security count
> not supported: enhanced erase
> 72min for SECURITY ERASE UNIT.
> HW reset results:
> CBLID- above Vih
> Device num = 0 determined by the jumper
> Checksum: correct
> # hdparm -I /dev/sdc
>
> /dev/sdc:
>
> ATA device, with non-removable media
> powers-up in standby; SET FEATURES subcmd spins-up.
> Model Number: IC35L120AVV207-0
> Serial Number: VNVD06G4CGKB5L
> Firmware Revision: V24OA66A
> Standards:
> Used: ATA/ATAPI-6 T13 1410D revision 3a
> Supported: 6 5 4
> Configuration:
> Logical max current
> cylinders 16383 16383
> heads 16 16
> sectors/track 63 63
> --
> CHS current addressable sectors: 16514064
> LBA user addressable sectors: 241254720
> LBA48 user addressable sectors: 241254720
> device size with M = 1024*1024: 117800 MBytes
> device size with M = 1000*1000: 123522 MBytes (123 GB)
> Capabilities:
> LBA, IORDY(can be disabled)
> Queue depth: 32
> Standby timer values: spec'd by Standard, no device specific minimum
> R/W multiple sector transfer: Max = 16 Current = 1
> Advanced power management level: unknown setting (0x0000)
> Recommended acoustic management value: 128, current value: 254
> DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
> Cycle time: min=120ns recommended=120ns
> PIO: pio0 pio1 pio2 pio3 pio4
> Cycle time: no flow control=240ns IORDY flow control=120ns
> Commands/features:
> Enabled Supported:
> * SMART feature set
> Security Mode feature set
> * Power Management feature set
> * Write cache
> * Look-ahead
> Release interrupt
> * Host Protected Area feature set
> * WRITE_BUFFER command
> * READ_BUFFER command
> * NOP cmd
> * READ/WRITE_DMA_QUEUED
> Advanced Power Management feature set
> Power-Up In Standby feature set
> SET_FEATURES required to spinup after power up
> Address Offset Reserved Area Boot
> SET_MAX security extension
> Automatic Acoustic Management feature set
> * 48-bit Address feature set
> * Device Configuration Overlay feature set
> * Mandatory FLUSH_CACHE
> * FLUSH_CACHE_EXT
> * SMART error logging
> * SMART self-test
> * General Purpose Logging feature set
> Security:
> Master password revision code = 65534
> supported
> not enabled
> not locked
> not frozen
> not expired: security count
> not supported: enhanced erase
> 60min for SECURITY ERASE UNIT.
> HW reset results:
> CBLID- above Vih
> Device num = 0 determined by the jumper
> Checksum: correct
>
> relevant part of dmesg without my fix:
> sata_nv 0000:00:07.0: version 3.5
> ACPI: PCI Interrupt Link [APSI] enabled at IRQ 22
> ACPI: PCI Interrupt 0000:00:07.0[A] -> Link [APSI] -> GSI 22 (level,
> low) -> IRQ 18
> sata_nv 0000:00:07.0: Using ADMA mode
> PCI: Setting latency timer of device 0000:00:07.0 to 64
> scsi0 : sata_nv
> scsi1 : sata_nv
> ata1: SATA max UDMA/133 cmd 0x9f0 ctl 0xbf0 bmdma 0xd800 irq 18
> ata2: SATA max UDMA/133 cmd 0x970 ctl 0xb70 bmdma 0xd808 irq 18
> ata1: SATA link down (SStatus 0 SControl 300)
> ata2: SATA link down (SStatus 0 SControl 300)
> ACPI: PCI Interrupt Link [APSJ] enabled at IRQ 21
> ACPI: PCI Interrupt 0000:00:08.0[A] -> Link [APSJ] -> GSI 21 (level,
> low) -> IRQ 19
> sata_nv 0000:00:08.0: Using ADMA mode
> PCI: Setting latency timer of device 0000:00:08.0 to 64
> scsi2 : sata_nv
> scsi3 : sata_nv
> ata3: SATA max UDMA/133 cmd 0x9e0 ctl 0xbe0 bmdma 0xc400 irq 19
> ata4: SATA max UDMA/133 cmd 0x960 ctl 0xb60 bmdma 0xc408 irq 19
> ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
> ata3.00: ATA-7: Maxtor 6L250S0, BACE1G20, max UDMA/133
> ata3.00: 490234752 sectors, multi 1: LBA48 NCQ (depth 31/32)
> ata3.00: configured for UDMA/133
> ata4: SATA link down (SStatus 0 SControl 300)
> scsi 2:0:0:0: Direct-Access ATA Maxtor 6L250S0 BACE PQ: 0 ANSI: 5
> ata3: bounce limit 0xFFFFFFFFFFFFFFFF, segment boundary 0xFFFFFFFF, hw segs 61
> sd 2:0:0:0: [sda] 490234752 512-byte hardware sectors (251000 MB)
> sd 2:0:0:0: [sda] Write Protect is off
> sd 2:0:0:0: [sda] Mode Sense: 00 3a 00 00
> sd 2:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't
> support DPO or FUA
> sd 2:0:0:0: [sda] 490234752 512-byte hardware sectors (251000 MB)
> sd 2:0:0:0: [sda] Write Protect is off
> sd 2:0:0:0: [sda] Mode Sense: 00 3a 00 00
> sd 2:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't
> support DPO or FUA
> sda: sda1 sda2 < sda5 sda6 sda7 >
> sd 2:0:0:0: [sda] Attached SCSI disk
> sd 2:0:0:0: Attached scsi generic sg0 type 0
> pata_amd 0000:00:06.0: version 0.3.9
> PCI: Setting latency timer of device 0000:00:06.0 to 64
> scsi4 : pata_amd
> scsi5 : pata_amd
> ata5: PATA max UDMA/133 cmd 0x1f0 ctl 0x3f6 bmdma 0xf000 irq 14
> ata6: PATA max UDMA/133 cmd 0x170 ctl 0x376 bmdma 0xf008 irq 15
> ata5.00: ATA-5: IC35L120AVVA07-0, VA6OA52A, max UDMA/100
> ata5.00: 241254720 sectors, multi 1: LBA
> ata5.01: ATAPI: HITACHI DVD-ROM GD-7500, 0005, max UDMA/33
> ata5.00: configured for UDMA/100
> ata5.01: configured for UDMA/33
> ata6.00: ATA-6: IC35L120AVV207-0, V24OA66A, max UDMA/100
> ata6.00: 241254720 sectors, multi 1: LBA48
> ata6.01: ATAPI: LITE-ON LTR-40125S, ZS0P, max UDMA/33
> ata6.00: limited to UDMA/33 due to 40-wire cable
> ata6.00: configured for UDMA/33
> ata6.01: configured for UDMA/33
> scsi 4:0:0:0: Direct-Access ATA IC35L120AVVA07-0 VA6O PQ: 0 ANSI: 5
> sd 4:0:0:0: [sdb] 241254720 512-byte hardware sectors (123522 MB)
> sd 4:0:0:0: [sdb] Write Protect is off
> sd 4:0:0:0: [sdb] Mode Sense: 00 3a 00 00
> sd 4:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't
> support DPO or FUA
> sd 4:0:0:0: [sdb] 241254720 512-byte hardware sectors (123522 MB)
> sd 4:0:0:0: [sdb] Write Protect is off
> sd 4:0:0:0: [sdb] Mode Sense: 00 3a 00 00
> sd 4:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't
> support DPO or FUA
> sdb: sdb1 sdb2 < sdb5 sdb6 >
> sd 4:0:0:0: [sdb] Attached SCSI disk
> sd 4:0:0:0: Attached scsi generic sg1 type 0
> scsi 4:0:1:0: CD-ROM HITACHI DVD-ROM GD-7500 0005 PQ: 0 ANSI: 5
> sr0: scsi3-mmc drive: 14x/40x cd/rw xa/form2 cdda tray
> Uniform CD-ROM driver Revision: 3.20
> sr 4:0:1:0: Attached scsi CD-ROM sr0
> sr 4:0:1:0: Attached scsi generic sg2 type 5
> scsi 5:0:0:0: Direct-Access ATA IC35L120AVV207-0 V24O PQ: 0 ANSI: 5
> sd 5:0:0:0: [sdc] 241254720 512-byte hardware sectors (123522 MB)
> sd 5:0:0:0: [sdc] Write Protect is off
> sd 5:0:0:0: [sdc] Mode Sense: 00 3a 00 00
> sd 5:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't
> support DPO or FUA
> sd 5:0:0:0: [sdc] 241254720 512-byte hardware sectors (123522 MB)
> sd 5:0:0:0: [sdc] Write Protect is off
> sd 5:0:0:0: [sdc] Mode Sense: 00 3a 00 00
> sd 5:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't
> support DPO or FUA
> sdc: sdc1 < sdc5 sdc6 >
> sd 5:0:0:0: [sdc] Attached SCSI disk
> sd 5:0:0:0: Attached scsi generic sg3 type 0
> scsi 5:0:1:0: CD-ROM LITE-ON LTR-40125S ZS0P PQ: 0 ANSI: 5
> sr1: scsi3-mmc drive: 164x/48x writer cd/rw xa/form2 cdda tray
> sr 5:0:1:0: Attached scsi CD-ROM sr1
> sr 5:0:1:0: Attached scsi generic sg4 type 5
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