Messages in this thread | | | Date | Wed, 27 Oct 1999 12:24:14 -0500 (CDT) | From | Thomas Molina <> | Subject | Setting UDMA on ide drives |
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I'm not sure what I'm doing wrong in setting UDMA for my ide drives. See the following:
/dev/hda: setting using_dma to 1 (on) HDIO_SET_DMA failed: Operation not permitted using_dma = 0 (off) [root@wr5z Documentation]# hdparm -d1 /dev/hdb
/dev/hdb: setting using_dma to 1 (on) HDIO_SET_DMA failed: Operation not permitted using_dma = 0 (off)
Information on both drives seem to indicate this should be possible.
[root@wr5z Documentation]# hdparm -i /dev/hda
/dev/hda:
Model=SAMSUNG VG34323A (4.32GB), FwRev=GQ101, SerialNo=ST18917092e5b4 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs } RawCHS=14896/9/63, TrkSize=32256, SectSize=512, ECCbytes=21 BuffType=3(DualPortCache), BuffSize=496kB, MaxMultSect=16, MultSect=off DblWordIO=no, maxPIO=2(fast), DMA=yes, maxDMA=2(fast) CurCHS=525/255/63, CurSects=-531627904, LBA=yes, LBA=yes, LBAsects=8446032 tDMA={min:120,rec:120}, DMA modes: sword0 sword1 sword2 *mword0 mword1 mword2 IORDY=on/off, tPIO={min:120,w/IORDY:120}, PIO modes: mode3 mode4 UDMA modes: mode0 mode1 *mode2
[root@wr5z Documentation]# hdparm -i /dev/hdb
/dev/hdb:
Model=WDC AC14300R, FwRev=15.01J55, SerialNo=WD-WM6260183946 Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq } RawCHS=8912/15/63, TrkSize=57600, SectSize=600, ECCbytes=40 BuffType=3(DualPortCache), BuffSize=512kB, MaxMultSect=16, MultSect=off DblWordIO=no, maxPIO=2(fast), DMA=yes, maxDMA=0(slow) CurCHS=524/255/63, CurSects=-2117074816, LBA=yes, LBA=yes, LBAsects=8421840 tDMA={min:120,rec:120}, DMA modes: mword0 mword1 *mword2 IORDY=on/off, tPIO={min:160,w/IORDY:120}, PIO modes: mode3 mode4 UDMA modes: mode0 mode1 mode2
Could someone provide the clue, or mention TFM to R. The cable is 14 inches, and adding ide0=dma seems to have no effect.
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