Messages in this thread | | | From | Tabris <> | Subject | 2.4.21-rc1-ac2 Promise IDE DMA won't work | Date | Mon, 28 Apr 2003 21:12:46 -0400 |
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I looked thru marc's archives, and i'm not finding anything specific to this problem, tho I do believe it is probably a known issue.
ASUS A7v266-E PDC20265 LITE-ON LTR-32123S
only device on the Promise IDE is the cd-rw drive. have four hard drives on the VIA IDE.
running kernel 2.4.21-rc1-ac2 + preempt + rmap15g + i2c-sensors
burning now works using cdrecord ATAPI (previous was 2.4.21-pre5-ac3 where the ide-scsi was too unstable)
at present, reading the cd drive takes 80+% of CPU system time...
I would like to be able to enable DMA. i tried doing it manually with hdparm. enabling 32-bit IO or enabling DMA would both make it just not work. [root@tabriel root]# hdparm /dev/hdg
/dev/hdg: HDIO_GET_MULTCOUNT failed: Invalid argument IO_support = 0 (default 16-bit) unmaskirq = 0 (off) using_dma = 0 (off) keepsettings = 0 (off) readonly = 1 (on) readahead = 8 (on) HDIO_GETGEO failed: Invalid argument [root@tabriel root]# [root@tabriel root]# hdparm -I /dev/hdg
/dev/hdg:
ATAPI CD-ROM, with removable media Model Number: LITE-ON LTR-32123S Serial Number: Firmware Revision: XS0R Standards: Used: ATAPI for CD-ROMs, SFF-8020i, r2.5 Supported: CD-ROM ATAPI-2 Configuration: DRQ response: 50us. Packet size: 12 bytes Capabilities: LBA, IORDY(cannot be disabled) DMA: *mdma0 mdma1 mdma2 udma0 udma1 udma2 Cycle time: min=120ns recommended=120ns PIO: pio0 pio1 pio2 pio3 pio4 Cycle time: no flow control=227ns IORDY flow control=120ns [root@tabriel root]#
any more info needed, just ask. any help much appreciated.
-- "Ignorance is the soil in which belief in miracles grows." -- Robert G. Ingersoll
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