David Burgess wrote: > Hey, > > hdparm -I indicates that my hard drive is running in udma2 mode: > > > >># hdparm -I /dev/hda >> >>/dev/hda: >> >>ATA device, with non-removable media >> Model Number: TOSHIBA MK2018GAS >> Serial Number: 52QJ1027T >> Firmware Revision: Q2.02 A >>Standards: >> Supported: 5 4 3 2 >> Likely used: 6 >>Configuration: >> Logical max current >> cylinders 16383 16383 >> heads 16 16 >> sectors/track 63 63 >> -- >> CHS current addressable sectors: 16514064 >> LBA user addressable sectors: 39070080 >> device size with M = 1024*1024: 19077 MBytes >> device size with M = 1000*1000: 20003 MBytes (20 GB) >>Capabilities: >> LBA, IORDY(can be disabled) >> bytes avail on r/w long: 46 Queue depth: 1 >> Standby timer values: spec'd by Standard, no device specific minimum >> R/W multiple sector transfer: Max = 16 Current = ? >> Advanced power management level: unknown setting (0x0080) >> DMA: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2 udma0 udma1 *udma2 udma3 >> udma4 udma5 > > > dmesg and hdparm -t confirm this: > > >># dmesg | grep hda >>Kernel command line: root=/dev/hda1 ro >> ide0: BM-DMA at 0xff00-0xff07, BIOS settings: hda:DMA, hdb:DMA >>hda: TOSHIBA MK2018GAS, ATA DISK drive >>hda: max request size: 128KiB >>hda: 39070080 sectors (20003 MB), CHS=38760/16/63, UDMA(33) >> hda: hda1 hda2 hda3 hda4 >> >> >># hdparm -t /dev/hda >> >>/dev/hda: >> Timing buffered disk reads: 66 MB in 3.07 seconds = 21.47 MB/sec > > > hdparm -I also indicates that this drive is capable of udma5, but I > can't seem to get it to use this mode. Ideas? > > Thanks, > dB > >
Are you using a newer 80 pin ribbon cable? That bit be when moving my Debian install to a new hardrive and case. I reused the old 40 pin calbe without realizing it would limit me to slow transfers. Also, does your mobo chipset support DMA modes that high? My laptop's hardrive reports to hdparm it is capable of UDMA5, but the chipset on the board (440 BX, it's a very old laptop) will only set it as high as UDMA2. -Roberto -- Roberto C. Sanchez http://familiasanchez.net/~sanchezr
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