Re: disk transfer speed problem

[lonely wolf]

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!