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Mám problem s řadičem promise fastrack tx2000 a 4x 250GB (Omezení řadiče na maximální kapacitu 160GB jsem vyřešil updatem biosu řadiče ze stránek výrobce na verzi 2.0.33) pod Gentoo. Řadič disky najde, linux správně zavede ovladač pdc202xx_new

PDC20271: IDE controller at PCI slot 0000:06:00.0
ACPI: PCI Interrupt 0000:06:00.0[A] -> GSI 20 (level, low) -> IRQ 22
PDC20271: chipset revision 2
PDC20271: ROM enabled at 0xfc400000
PDC20271: 100% native mode on irq 22
    ide4: BM-DMA at 0xb000-0xb007, BIOS settings: hdi:pio, hdj:pio
    ide5: BM-DMA at 0xb008-0xb00f, BIOS settings: hdk:pio, hdl:pio
Probing IDE interface ide4...
usb 2-1: new full speed USB device using uhci_hcd and address 2
hdi: ST3250824A, ATA DISK drive
hdj: ST3250824A, ATA DISK drive
ide4 at 0xa000-0xa007,0xa402 on irq 22
hdi: max request size: 512KiB
hdi: 488397168 sectors (250059 MB) w/8192KiB Cache, CHS=30401/255/63, UDMA(100)
hdi: cache flushes supported
 hdi:<6>usb 2-2: new full speed USB device using uhci_hcd and address 3
 hdi1
hdj: max request size: 512KiB
hdj: 488397168 sectors (250059 MB) w/8192KiB Cache, CHS=30401/255/63, UDMA(100)
hdj: cache flushes supported
 hdj: hdj1
Probing IDE interface ide5...
hdk: Maxtor 7Y250P0, ATA DISK drive
hdl: ST3250824A, ATA DISK drive
ide5 at 0xa800-0xa807,0xac02 on irq 22
hdk: max request size: 512KiB
hdk: Host Protected Area detected.
        current capacity is 490232639 sectors (250999 MB)
        native  capacity is 490234752 sectors (251000 MB)
hdk: Host Protected Area disabled.
hdk: 490234752 sectors (251000 MB) w/7936KiB Cache, CHS=30515/255/63, UDMA(133)
hdk: cache flushes supported
 hdk: hdk1
hdl: max request size: 512KiB
hdl: 488397168 sectors (250059 MB) w/8192KiB Cache, CHS=30401/255/63, UDMA(100)
hdl: cache flushes supported
 hdl: hdl1

Pomocí /etc/conf.hdparm nastavím

# cat /etc/conf.d/hdparm
# /etc/conf.d/hdparm: config file for /etc/init.d/hdparm
#
hdi_args="-d1 -X69 -u1 -c3 -S120"
hdj_args="-d1 -X69 -u1 -c3 -S120"
hdk_args="-d1 -X69 -u1 -c3 -S120"
hdl_args="-d1 -X69 -u1 -c3 -S120"
all_args="-d1 -X69 -u1 -c3 -S120"

Disky mají pak očekávanou rychlost okolo 60MB/s, ale časem se začnou objevovat výpisy v dmesg:

PDC202XX: Primary channel reset.
hdi: no DRQ after issuing MULTWRITE_EXT
ide4: reset: success
hdl: dma_timer_expiry: dma status == 0x60
hdl: DMA timeout retry
PDC202XX: Secondary channel reset.
hdl: timeout waiting for DMA
hdl: status error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hdl: drive not ready for command
hdl: status error: status=0x50 { DriveReady SeekComplete }
ide: failed opcode was: unknown
hdl: no DRQ after issuing MULTWRITE_EXT
hdl: status timeout: status=0xd0 { Busy }
ide: failed opcode was: unknown
hdk: DMA disabled
PDC202XX: Secondary channel reset.
hdl: no DRQ after issuing MULTWRITE_EXT
ide5: reset: success
hdk: task_out_intr: status=0x50 { DriveReady SeekComplete }
ide: failed opcode was: unknown
hdk: task_out_intr: status=0x50 { DriveReady SeekComplete }
ide: failed opcode was: unknown
hdk: task_out_intr: status=0x50 { DriveReady SeekComplete }
ide: failed opcode was: unknown
hdk: task_out_intr: status=0x50 { DriveReady SeekComplete }
ide: failed opcode was: unknown
hdk: task_out_intr: status=0x50 { DriveReady SeekComplete }
ide: failed opcode was: unknown
hdk: task_out_intr: status=0x50 { DriveReady SeekComplete }
ide: failed opcode was: unknown
hdk: task_out_intr: status=0x50 { DriveReady SeekComplete }
ide: failed opcode was: unknown
hdk: task_out_intr: status=0x50 { DriveReady SeekComplete }
ide: failed opcode was: unknown
hdl: dma_timer_expiry: dma status == 0x40
hdl: DMA timeout retry
PDC202XX: Secondary channel reset.
hdl: timeout waiting for DMA
hdl: status error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hdl: drive not ready for command
hdl: status error: status=0x50 { DriveReady SeekComplete }
ide: failed opcode was: unknown
hdl: no DRQ after issuing MULTWRITE_EXT
hdl: status timeout: status=0xd0 { Busy }
ide: failed opcode was: unknown
PDC202XX: Secondary channel reset.
hdl: no DRQ after issuing MULTWRITE_EXT
ide5: reset: success
hdl: dma_timer_expiry: dma status == 0x40
hdl: DMA timeout retry
PDC202XX: Secondary channel reset.
hdl: timeout waiting for DMA
hdl: status error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hdl: drive not ready for command
hdl: status timeout: status=0xd0 { Busy }
ide: failed opcode was: unknown
PDC202XX: Secondary channel reset.
hdl: no DRQ after issuing MULTWRITE_EXT
ide5: reset: success
hdk: task_out_intr: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hdk: task_out_intr: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hdk: task_out_intr: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hdk: task_out_intr: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hdk: task_out_intr: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hdl: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hdl: dma_intr: error=0x84 { DriveStatusError BadCRC }
ide: failed opcode was: unknown
hdl: dma_timer_expiry: dma status == 0x40
hdl: DMA timeout retry
PDC202XX: Secondary channel reset.
hdl: timeout waiting for DMA
hdl: status error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hdl: drive not ready for command
hdl: status error: status=0x50 { DriveReady SeekComplete }
ide: failed opcode was: unknown
hdl: no DRQ after issuing MULTWRITE_EXT
hdl: status timeout: status=0xd0 { Busy }
ide: failed opcode was: unknown
PDC202XX: Secondary channel reset.
hdl: no DRQ after issuing MULTWRITE_EXT
ide5: reset: success
sky2 eth1: Link is down.
sky2 eth1: Link is up at 100 Mbps, full duplex, flow control both
ide2: Speed warnings UDMA 3/4/5 is not functional.
ide2: Speed warnings UDMA 3/4/5 is not functional.
hdl: dma_timer_expiry: dma status == 0x60
hdl: DMA timeout retry
PDC202XX: Secondary channel reset.
hdl: timeout waiting for DMA
hdl: status error: status=0x58 { DriveReady SeekComplete DataRequest }
ide: failed opcode was: unknown
hdl: drive not ready for command
hdl: status error: status=0x50 { DriveReady SeekComplete }
ide: failed opcode was: unknown
hdl: no DRQ after issuing MULTWRITE_EXT
...

což zapříčiní, že diskům vypadne DMA a nastavení z HDPARM takže rychlost přenosu spadne na 3MB/s, občas PC kompletně zatuhne. Po /etc/init.d/hdparm restart disky mají zas na nějakou dobu správnou rychlost. Nevíte někdo o nějaké záplatě nebo postupu jak přesvědčit řadič aby si disky zachovaly nastavení. Případně vaše zkušenosti, zda tento kus HW rovnou nezahodit?

Systém:
Gentoo 2006.1
2.6.18-gentoo-r6
i686 Intel(R) Core(TM)2 CPU 6400  @ 2.13GHz GenuineIntel GNU/Linux
4GB RAM @677Mhz