>On Fri, 2002-12-06 at 19:29, David Ashley wrote:
>> ide0: BM-DMA at 0x1880-0x1887, BIOS settings: hda:pio, hdb:DMA
>> ide1: BM-DMA at 0x1888-0x188f, BIOS settings: hdc:pio, hdd:DMA
>
>When we read the settings DMA was disabled on hda and hdc. We therefore
>assumed the BIOS did that for a reason and followed caution.
>
>What happens if you do
>
> hdparm -d1 /dev/hda
>
>?
hda is an IDE cdrom drive, but here it is:
root@test:~# hdparm -d1 /dev/hda
/dev/hda:
setting using_dma to 1 (on)
using_dma = 1 (on)
root@test:~#
root@test:~# hdparm -d1 /dev/hdb
/dev/hdb:
setting using_dma to 1 (on)
using_dma = 1 (on)
root@test:~#
root@test:~# hdparm /dev/hdb
/dev/hdb:
multcount = 16 (on)
I/O support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
HDIO_GETGEO_BIG failed: Inappropriate ioctl for device
root@test:~# hdparm -h
hdparm - get/set hard disk parameters - version v4.1
Usage: hdparm [options] [device] ..
Options:
-a get/set fs readahead
-A set drive read-lookahead flag (0/1)
-B get Advanced Power Management setting (1-255)
-c get/set IDE 32-bit IO setting
-C check IDE power mode status
-d get/set using_dma flag
-D enable/disable drive defect-mgmt
-E set cd-rom drive speed
-f flush buffer cache for device on exit
-g display drive geometry
-h display terse usage information
-i display drive identification
-I read drive identification directly from drive
-k get/set keep_settings_over_reset flag (0/1)
-K set drive keep_features_over_reset flag (0/1)
-L set drive doorlock (0/1) (removable harddisks only)
-m get/set multiple sector count
-n get/set ignore-write-errors flag (0/1)
-p set PIO mode on IDE interface chipset (0,1,2,3,4,...)
-P set drive prefetch count
-q change next setting quietly
-r get/set readonly flag (DANGEROUS to set)
-R register an IDE interface (DANGEROUS)
-S set standby (spindown) timeout
-t perform device read timings
-T perform cache read timings
-u get/set unmaskirq flag (0/1)
-U un-register an IDE interface (DANGEROUS)
-v default; same as -acdgkmnru (-gr for SCSI, -adgr for XT)
-V display program version and exit immediately
-w perform device reset (DANGEROUS)
-W set drive write-caching flag (0/1) (DANGEROUS)
-x perform device for hotswap flag (0/1) (DANGEROUS)
-X set IDE xfer mode (DANGEROUS)
-y put IDE drive in standby mode
-Y put IDE drive to sleep
-Z disable Seagate auto-powersaving mode
root@test:~#
-Dave
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This archive was generated by hypermail 2b29 : Sat Dec 07 2002 - 22:00:28 EST