hi robert
to increase from 4.36mb/sec just set your DMA mode
hdparm -d1 /dev/hdc
- also check that you ide cable is "good" ??
- get a ata-100-rated 1' cable...
( NOT the 3' cables though it works sometimes
( if you are getting seek/crc errors either your
( cable is bad or your disk is dying
-
- backup your data to a different hd before it dies
-
- also be sure that you only have the same speed devices
on the ide cables...
- do NOT mix dma-33 with dma-100 devices
more performance tuning info
http://www.Linux-1U.net/Disks/hdparm.txt
have fun
alvin
On Tue, 22 Jan 2002, Rob Weir wrote:
> On Thu, Jan 17, 2002 at 03:20:19PM +0100, Robert Epprecht wrote:
> > I have a new hd. 'dmesg' says:
> >
> > ide1: BM-DMA at 0xd808-0xd80f, BIOS settings: hdc:DMA, hdd:pio
> > hdc: Maxtor 4D040H2, ATA DISK drive
> > ide1 at 0x170-0x177,0x376 on irq 15
> > hdc: Maxtor 4D040H2, 39083MB w/2048kB Cache, CHS=4982/255/63, UDMA
> >
> > If I say 'hdparm -t /dev/hdc' (or want to mount it) I get:
> >
> > /dev/hdc:
> > Timing buffered disk reads: hdc: dma_intr: status=0x51 { DriveReady
> > SeekComplete Error }
> > hdc: dma_intr: error=0x84 { DriveStatusError BadCRC }
> > hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> > [ ... last two lines repeated three times ... ]
> > hdc: DMA disabled
> > ide1: reset: success
> > 64 MB in 14.67 seconds = 4.36 MB/sec
> >
> > Why? How do I fix that?
>
> Just remember, make sure you have backups if you're going to fiddle
> with hdparm: I managed to trash (as far as I can tell) all my Linux
> filesystems playing around with it.
>
> -rob
>
