RE: VIA IDE performance under 2.6.0-test7/8? (and test9)

From: Claas Langbehn
Date: Sun Nov 02 2003 - 05:50:54 EST


If I cat /proc/ide/via it shows that my harddisc is only
using 88,8 MB/s, but it is an U100-disc. hdparm show that
its using udma5, is this all correct, or should /proc/ide/via
show 99,9 MB/s ?

----------VIA BusMastering IDE Configuration----------------
Driver Version: 3.38
South Bridge: VIA vt8235
Revision: ISA 0x0 IDE 0x6
Highest DMA rate: UDMA133
BM-DMA base: 0xdc00
PCI clock: 33.3MHz
Master Read Cycle IRDY: 0ws
Master Write Cycle IRDY: 0ws
BM IDE Status Register Read Retry: yes
Max DRDY Pulse Width: No limit
-----------------------Primary IDE-------Secondary IDE------
Read DMA FIFO flush: yes yes
End Sector FIFO flush: no no
Prefetch Buffer: yes yes
Post Write Buffer: yes yes
Enabled: yes yes
Simplex only: no no
Cable Type: 80w 80w
Transfer Mode: UDMA PIO UDMA PIO
Address Setup: 120ns 120ns 120ns 120ns
Cmd Active: 90ns 90ns 90ns 90ns
Cmd Recovery: 30ns 30ns 30ns 30ns
Data Active: 90ns 330ns 90ns 330ns
Data Recovery: 30ns 270ns 30ns 270ns
Cycle Time: 22ns 600ns 60ns 600ns
Transfer Rate: 88.8MB/s 3.3MB/s 33.3MB/s 3.3MB/s

# hdparm -i /dev/hda


Model=ST3120023A, FwRev=3.33, SerialNo=3KA1ERGQ
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=16514064, LBA=yes, LBAsects=234441648
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: ATA/ATAPI-6 T13 1410D revision 2:

* signifies the current active mode

Regards, claas
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