As Inderstand it, there is very little difference between UDMA33 and UDMA66
when there is a single disk on the IDE channel.
Chris Slater-Walker
----- Original Message -----
From: "Xuejun Liu" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, August 10, 2000 6:10 PM
Subject: [expert] Harddisk speed with UDMA66
> Hi,
>
> How is the ultimate harddisk performance with UDMA66? Although it
> works fine with UDMA66,but the harddisk performance is
> just like UDMA33 as below. The question is how to improve
> the speed up to 20M/sec or so. My mainboard is Abit BP6
> with HPT366, harddisk is IBM-DJNA-351520.
>
> Any suggestions will be most appreciated.
>
> Regards,
>
> Jun
>
> --------------------------------------------------------
> [root@fsbbs liuxj]# hdparm -tT /dev/hde
>
> /dev/hde:
> Timing buffer-cache reads: 128 MB in 1.79 seconds = 71.51 MB/sec
> Timing buffered disk reads: 64 MB in 4.38 seconds = 14.61 MB/sec
> --------------------------------------------------------
>
> The information of harddisk is,
> --------------------------------------------------------
> [root@fsbbs liuxj]# hdparm -i /dev/hde
>
> /dev/hde:
>
> Model=IBM-DJNA-351520, FwRev=J56OA30K, SerialNo=G80GLWAQ332
> Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
> RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=34
> BuffType=DualPortCache, BuffSize=430kB, MaxMultSect=16, MultSect=16
> CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=30033360
> IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
> PIO modes: pio0 pio1 pio2 pio3 pio4
> DMA modes: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 *udma4
> -----------------
> [root@fsbbs liuxj]# hdparm /dev/hde
>
> /dev/hde:
> multcount = 16 (on)
> I/O support = 1 (32-bit)
> unmaskirq = 0 (off)
> using_dma = 1 (on)
> keepsettings = 1 (on)
> nowerr = 0 (off)
> readonly = 0 (off)
> readahead = 8 (on)
> geometry = 29795/16/63, sectors = 30033360, start = 0
> --------------------------------------------------------------
>
>
>
>
