Scharf Yuval wrote: > Hello, > > Can someone explain to me the following log messages from the kernel: > > ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx > ICH2: IDE controller on PCI bus 00 dev f9 > ICH2: chipset revision 2 > ICH2: not 100% native mode: will probe irqs later > ide0: BM-DMA at 0xff00-0xff07, BIOS settings: hda:DMA, hdb:pio > ide1: BM-DMA at 0xff08-0xff0f, BIOS settings: hdc:DMA, hdd:DMA > hda: 39102336 sectors (20020 MB) w/512KiB Cache, CHS=2434/255/63, UDMA(100) > > Using `hdparm -t /dev/hda5` I get ~27MB/s. > Does it mean that my bus holds back my HD. > Shouldn't I get 100MB/s? > Can I do something to improve performance. >
What a 'hdparm' day ;-) Just read the manual page of hdparm and you will see that the '-t' flag only gives your _Hard Drive_ speed. And a 27MB/s data rate is quite corect for an IDE Hard Drive. My latest Seagate Barracuda is given at 55MB/s, and my old Baracuda IV 80GB is given at 30MB/s. In fact, i do not think that hdparm can easily reach the theorical IDE bus speed, as the '-T' flag ( the second of the only two bench flags I know ) gives system mem-buffer I/O speed. -- Nicolas -- [EMAIL PROTECTED] mailing list
