Hi Timo. On Wednesday 18 February 2004 08:19, Timo Railo wrote: > Thanks Benedict, > > this is what happened (also tried just -d1). > > hdparm -d 1 -c 1 /dev/hda > > /dev/hda: > setting 32-bit IO_support flag to 1 > setting using_dma to 1 (on) > HDIO_SET_DMA failed: Operation not permitted > IO_support = 1 (32-bit) > using_dma = 0 (off) > > Man this is tough... > > Timo > Looking at the man page for hdparm, it's possible your drive doesn't support that operation (-d). You might google with the name of your drive, to see if it's a known issue. Have you also tried "hdparm -d 1 -X34 /dev/hda"? I wonder if that would help.
For what it's worth, my RAID-1 performance was quite different from yours: # hdparm -Tt /dev/hda /dev/hdc /dev/md1 /dev/hda: Timing buffer-cache reads: 128 MB in 1.02 seconds =125.49 MB/sec Timing buffered disk reads: 64 MB in 3.01 seconds = 21.26 MB/sec /dev/hdc: Timing buffer-cache reads: 128 MB in 1.11 seconds =115.32 MB/sec Timing buffered disk reads: 64 MB in 2.93 seconds = 21.84 MB/sec /dev/md1: Timing buffer-cache reads: 128 MB in 1.09 seconds =117.43 MB/sec Timing buffered disk reads: 64 MB in 3.01 seconds = 21.26 MB/sec My disks are operating in udma2 mode. Justin -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
