udma5 is active, but HDD tranfers 2,6MB/s

udma5 is active, but HDD tranfers 2,6MB/s

Post by swes » Fri, 29 Aug 2003 22:36:50



Hallo,

on my Asus M2400N Notebook (2.4.22), i could finally switch on UDMA5
(hdparm -i). But hdparm -t tells me only 2,6 MB/s, which is still
very, very bad. The HDD could transfer ca. 20 MB/s.

What else is important/misses? What about the HDD-controller?

Thanks in advance.
CU
Sven

 
 
 

udma5 is active, but HDD tranfers 2,6MB/s

Post by NOON » Fri, 29 Aug 2003 23:49:56



> Hallo,

> on my Asus M2400N Notebook (2.4.22), i could finally switch on UDMA5
> (hdparm -i). But hdparm -t tells me only 2,6 MB/s, which is still
> very, very bad. The HDD could transfer ca. 20 MB/s.

> What else is important/misses? What about the HDD-controller?

> Thanks in advance.
> CU
> Sven

Can you at least show the output from "hdparm -i" of the said drive?

--
NOONE

 
 
 

udma5 is active, but HDD tranfers 2,6MB/s

Post by swes » Sat, 30 Aug 2003 04:25:46


Hello,


> Can you at least show the output from "hdparm -i" of the said drive?

Of course. Here we go...

/dev/hda:
 Model=IC25N040ATCS04-0, FwRev=CA4OA71A, SerialNo=CSH406DDHPGGEB
 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
 BuffType=DualPortCache, BuffSize=1768kB, MaxMultSect=16, MultSect=16
 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=78140160
 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=yes: mode=0x80 (128) WriteCache=enabled
 Drive conforms to: ATA/ATAPI-5 T13 1321D revision 3:  2 3 4 5

CU
Sven

 
 
 

udma5 is active, but HDD tranfers 2,6MB/s

Post by TCS » Sat, 30 Aug 2003 04:50:21



Quote:> Hallo,

> on my Asus M2400N Notebook (2.4.22), i could finally switch on UDMA5
> (hdparm -i). But hdparm -t tells me only 2,6 MB/s, which is still
> very, very bad. The HDD could transfer ca. 20 MB/s.

actually it's typical for a laptop drive.

What size is that drive?  Data speed is determined by density * number of
heads (platters*2) * rotational speed.  Laptop drives are typically one
or two platters spinning at 4500rpm.

Quote:

> What else is important/misses? What about the HDD-controller?

 
 
 

udma5 is active, but HDD tranfers 2,6MB/s

Post by Andreas Jansse » Sat, 30 Aug 2003 05:37:35


Hello




>> Can you at least show the output from "hdparm -i" of the said drive?

> Of course. Here we go...

> /dev/hda:
>  Model=IC25N040ATCS04-0, FwRev=CA4OA71A, SerialNo=CSH406DDHPGGEB
> [...]
>  PIO modes:  pio0 pio1 pio2 pio3 pio4
>  DMA modes:  mdma0 mdma1 mdma2
>  UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5

The "*" does not mean that DMA is activated. It only means that _if_ it
is activated, udma5 will be used. Check if is activated by using

hdparm /dev/hda

and see what using_dma is set to.

best regards
        Andreas Janssen

--
Andreas Janssen

PGP-Key-ID: 0xDC801674
Registered Linux User #267976

 
 
 

udma5 is active, but HDD tranfers 2,6MB/s

Post by markus brosc » Sun, 31 Aug 2003 06:34:43



> on my Asus M2400N Notebook (2.4.22), i could finally switch on UDMA5
> (hdparm -i). But hdparm -t tells me only 2,6 MB/s, which is still very,
> very bad. The HDD could transfer ca. 20 MB/s.

> What else is important/misses?

Hi Sven

Asus M2400N clash with the standard ACPI implementation. And that causes
the UDMA trouble.

2 possible workarounds:

- patch the kernel to use your own DSDT (see on my website
http://www.brosch.cc -> Debian -> AsusM2400N)

or

- disable ACPI in your kernel configuration :-(

Try it out and you'll get your 20MB/s. A "hdparm -t /dev/hda" results in
"20.13 MB/sec" - I think that's what you are looking for ...

Best regards, Markus

 
 
 

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