What idebus= setting should I use?

mpyusko · 05-14-2008, 06:12 PM

I have a VT82C694X chipset, the datasheet is Here. I'm not sure if 33 is correct. I'm running a p3@1GHz with 1.5GB PC133 SDRAM. I included the hdparm -i output for all the hard drives in my system. (hdd will soon be hda, and hda will be gone.)

Thanks!

Quote:

Originally Posted by dmesg

ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
ide0: BM-DMA at 0xb800-0xb807, BIOS settings: hda:DMA, hdb:DMA
ide1: BM-DMA at 0xb808-0xb80f, BIOS settings: hdc:DMA, hdd:DMA
Probing IDE interface ide0...
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
Probing IDE interface ide1...
ide1 at 0x170-0x177,0x376 on irq 15

Quote:

Originally Posted by hdparm

hdparm -i /dev/hda

/dev/hda:

Model=ST310220A, FwRev=3.07, SerialNo=7BW0L55R
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=0
BuffType=unknown, BuffSize=512kB, MaxMultSect=16, MultSect=off
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=20005650
IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 *udma4
AdvancedPM=no WriteCache=enabled
Drive conforms to: Unspecified: ATA/ATAPI-1,2,3,4

* signifies the current active mode

Quote:

Originally Posted by hdparm

hdparm -i /dev/hdb

/dev/hdb:

Model=Maxtor 6Y120L0, FwRev=YAR41VW0, SerialNo=Y40GZA4E
Config={ Fixed }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
BuffType=DualPortCache, BuffSize=2048kB, MaxMultSect=16, MultSect=off
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=240121728
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 *udma4 udma5 udma6
AdvancedPM=yes: disabled (255) WriteCache=enabled
Drive conforms to: ATA/ATAPI-7 T13 1532D revision 0: ATA/ATAPI-1,2,3,4,5,6,7

* signifies the current active mode

Quote:

Originally Posted by hdparm

hdparm -i /dev/hdd

/dev/hdd:

Model=Maxtor 6Y160P0, FwRev=YAR41BW0, SerialNo=Y48Q661E
Config={ Fixed }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
BuffType=DualPortCache, BuffSize=7936kB, MaxMultSect=16, MultSect=off
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=268435455
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 *udma4 udma5 udma6
AdvancedPM=yes: disabled (255) WriteCache=enabled
Drive conforms to: ATA/ATAPI-7 T13 1532D revision 0: ATA/ATAPI-1,2,3,4,5,6,7

* signifies the current active mode

Quote:

Originally Posted by speed

For Kicks...
root@bipers:~# hdparm -t /dev/hda

/dev/hda:
Timing buffered disk reads: 72 MB in 3.01 seconds = 23.88 MB/sec
root@bipers:~# hdparm -t /dev/hda

/dev/hda:
Timing buffered disk reads: 74 MB in 3.01 seconds = 24.60 MB/sec
root@bipers:~# hdparm -t /dev/hda

/dev/hda:
Timing buffered disk reads: 74 MB in 3.07 seconds = 24.07 MB/sec

_____________________________________________________________________

root@bipers:~# hdparm -t /dev/hdb

/dev/hdb:
Timing buffered disk reads: 108 MB in 3.03 seconds = 35.67 MB/sec
root@bipers:~# hdparm -t /dev/hdb

/dev/hdb:
Timing buffered disk reads: 110 MB in 3.04 seconds = 36.20 MB/sec
root@bipers:~# hdparm -t /dev/hdb

/dev/hdb:
Timing buffered disk reads: 108 MB in 3.04 seconds = 35.55 MB/sec
_____________________________________________________________________
root@bipers:~# hdparm -t /dev/hdd

/dev/hdd:
Timing buffered disk reads: 142 MB in 3.04 seconds = 46.72 MB/sec
root@bipers:~# hdparm -t /dev/hdd

/dev/hdd:
Timing buffered disk reads: 134 MB in 3.01 seconds = 44.55 MB/sec
root@bipers:~# hdparm -t /dev/hdd

/dev/hdd:
Timing buffered disk reads: 140 MB in 3.05 seconds = 45.95 MB/sec

whansard · 05-14-2008, 08:32 PM

that speed only matters for pio modes. your drives are all running dma.