From: "L.V.Gandhi" <[EMAIL PROTECTED]>
> I have two hard disks 20 gb seagate and 40 gb samsung. I see in BIOS they
are
> 100 ATA. However when I use hdparm, i get follwing results.
> [EMAIL PROTECTED] lvgandhi]# hdparm /dev/hda
>
> /dev/hda:
> multcount = 16 (on)
> IO_support = 1 (32-bit)
> unmaskirq = 1 (on)
> using_dma = 1 (on)
> keepsettings = 0 (off)
> readonly = 0 (off)
> readahead = 8 (on)
> geometry = 2434/255/63, sectors = 39102336, start = 0
> [EMAIL PROTECTED] lvgandhi]# hdparm -tT /dev/hda
>
> /dev/hda:
> Timing buffer-cache reads: 128 MB in 0.37 seconds =345.95 MB/sec
> Timing buffered disk reads: 64 MB in 4.17 seconds = 15.35 MB/sec
> [EMAIL PROTECTED] lvgandhi]# hdparm -i /dev/hda
>
> /dev/hda:
>
> Model=ST320413A, FwRev=3.39, SerialNo=6ED1JBLC
> Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
> RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=0
> BuffType=unknown, BuffSize=512kB, MaxMultSect=16, MultSect=16
> CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=39102336
> 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
> UDMA modes: udma0 udma1 *udma2 udma3 udma4 udma5
> AdvancedPM=no WriteCache=enabled
> Drive conforms to: device does not report version: 1 2 3 4
>
> I have following lines in dmesg.
> blk: queue c03cb420, I/O limit 4095Mb (mask 0xffffffff)
> ide0: Speed warnings UDMA 3/4/5 is not functional.
> blk: queue c03cb55c, I/O limit 4095Mb (mask 0xffffffff)
> ide0: Speed warnings UDMA 3/4/5 is not functional.
>
> hdparm -X 69 /dev/hda also doesn't help.
>
> but for the same hdd, with mercury mb and 815 chipset, in mdk91, I used to
get
> buffered disk reads nearly 29 MB/s.
How about telling what kernel version you are running,
and what m/b and chipset do you have...?
--
Regards
Thomas
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