UDMA 66 numa Epox MVP3G2
Olá pessoal,
tenho uma placa mãe Epox MVP3G2 com controladora ide e suporte a UDMA 66 (que funciona no
rWindows) que usa o chipset é VT82C596B da VIA. Estou compilando o kernel 2.4.1 habilitando a opção
"VIA82 CXXX chipset support" e "Use PCI DMA by defaul when availble¨ assim como manda o figurino,
entretanto quando vou ver se funcionou:
babylon5:/usr/src/kernel-source-2.4.1$ cat /proc/ide/via
----------VIA BusMastering IDE Configuration----------------
Driver Version: 2.1e
South Bridge: VIA vt82c596b rev 0x12
Command register: 0x7
Latency timer: 64
PCI clock: 33MHz
Master Read Cycle IRDY: 0ws
Master Write Cycle IRDY: 0ws
FIFO Output Data 1/2 Clock Advance: off
BM IDE Status Register Read Retry: on
Max DRDY Pulse Width: No limit
-----------------------Primary IDE-------Secondary IDE------
Read DMA FIFO flush: on on
End Sect. FIFO flush: on on
Prefetch Buffer: on on
Post Write Buffer: on on
FIFO size: 8 8
Threshold Prim.: 1/2 1/2
Bytes Per Sector: 512 512
Both channels togth: yes yes
-------------------drive0----drive1----drive2----drive3-----
BMDMA enabled: yes yes yes yes
Transfer Mode: UDMA DMA/PIO DMA/PIO DMA/PIO
Address Setup: 30ns 30ns 30ns 30ns
Active Pulse: 90ns 90ns 90ns 90ns
Recovery Time: 30ns 30ns 30ns 30ns
Cycle Time: 60ns 120ns 120ns 120ns
Transfer Rate: 33.0MB/s 16.5MB/s 16.5MB/s 16.5MB/s
Pois é, vejo que ela continua a 33Mb/s ao invés dos 66 esperados :-(
Mesmo forçando com ide=ata66 na chamada do kernel o resultado é o mesmo.
Só pra constar a saída do dmesg no trecho em há a chamada da ide é:
--Inicio-- (...)
Uniform Multi-Platform E-IDE driver Revision: 6.31
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
VP_IDE: IDE controller on PCI bus 00 dev 39
VP_IDE: chipset revision 6
VP_IDE: not 100% native mode: will probe irqs later
VP_IDE: VIA vt82c596b IDE UDMA66 controller on pci0:7.1
VP_IDE: ATA-66/100 forced bit set (WARNING)!!
ide0: BM-DMA at 0xe000-0xe007, BIOS settings: hda:DMA, hdb:DMA
ide1: BM-DMA at 0xe008-0xe00f, BIOS settings: hdc:DMA, hdd:DMA
hda: QUANTUM FIREBALL CR6.4A, ATA DISK drive
hdb: QUANTUM Pioneer SG 2.1A, ATA DISK drive
hdc: CREATIVECD1620E, ATAPI CD/DVD-ROM drive
hdd: QUANTUM BIGFOOT1280A, ATA DISK drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: 12594960 sectors (6449 MB) w/418KiB Cache, CHS=784/255/63, UDMA(33)
hdb: 4124736 sectors (2112 MB) w/40KiB Cache, CHS=1023/64/63, DMA
hdd: 2511936 sectors (1286 MB) w/87KiB Cache, CHS=2492/16/63, DMA
hdc: ATAPI 16X CD-ROM drive, 240kB Cache, DMA
Uniform CD-ROM driver Revision: 3.12
Partition check:
hda: hda1
hdb: hdb1 hdb2 hdb3
hdd: [PTBL] [623/64/63] hdd1
(...)--Fim--
Agradeço se alguém tiver alguma dica pra fazer minha controladora funcionar a 66Mb/s.
Desculpem a mensagem longa, mas achei melhor dar um maior número de informações.
Ótimo carnaval pra vocês!
--
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Itamar Grochowski Rocha
Fortune cookie for you:
O homem superior age antes de falar e depois fala de acordo
com suas acoes.
-- Confucio
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