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SubjectRe: disk transfer speed problem
On Thu, 28 Feb 2002, Stephen Samuel wrote:

> Picking nits, perhaps -- but after giving us data on hdc,
> you did the test on hdd. I realize you said that it is identical
> for both, but if you missed something critical, we'll never see it.
they are 100% identical. except for the fact that one is
master and the other slave on the same cable.
I did not include the results for both in order to shorten the message.
here we go, just in case:

[root@bugmaster /root]# /sbin/hdparm -tT /dev/hdc /dev/hdd;/sbin/hdparm
/dev/hdc /dev/hdd;/sbin/hdparm -i /dev/hdc /dev/hdd

/dev/hdc:
Timing buffer-cache reads: 128 MB in 1.17 seconds =109.40 MB/sec
Timing buffered disk reads: 64 MB in 3.01 seconds = 21.26 MB/sec

/dev/hdd:
Timing buffer-cache reads: 128 MB in 1.09 seconds =117.43 MB/sec
Timing buffered disk reads: 64 MB in 2.96 seconds = 21.62 MB/sec

/dev/hdc:
multcount = 16 (on)
I/O support = 1 (32-bit)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 23989/16/63, sectors = 156301488, start = 0

/dev/hdd:
multcount = 16 (on)
I/O support = 1 (32-bit)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 23989/16/63, sectors = 156301488, start = 0

/dev/hdc:

Model=ST380021A, FwRev=3.05, SerialNo=3HV080KH
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
BuffType=unknown, BuffSize=2048kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=156301488
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 *udma5

/dev/hdd:

Model=ST380021A, FwRev=3.05, SerialNo=3HV07SDN
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
BuffType=unknown, BuffSize=2048kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=156301488
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 *udma5


Mr Davidovac Zoran mentioned normal transfer speeds with kernel 2.4.17.
Should I try ? Are there significant differences between 2.4.9-21 (or -31)
and 2.4.17 in the IDE drivers ?



This is Linux Country. On a quiet night, you can hear
Windows NT reboot!



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