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Re: [TEKNIK] Promise UDMA66



Jesper Monsted wrote:
> 
> Jeg har lige fået leveret en Promise UDMA66 controller til min fine nye
> disk og satsede på at få omkring 20 MB/s... Desværre får jeg ingen UDMA på
> den controller og jeg kan desværre ikke få mere end 7.5 MB/s (med lidt
> pillen i opsætning). Er her nogen der har fået en promise til at køre
> UDMA66?
> 

Når lige netop Promise UDMA66 kommer på tale, så vil jeg lige henvise
til en interessant artikel, omkring hvorledes man ombygger den til en
FastTrak66. Fordelen er at man får mulighed for RAID.

Se: http://www6.tomshardware.com/storage/00q1/000329/

Som der rigtig nok skrives længere nede i tråden så har man i realiteten
ikke bruger for UDMA66 - men det gælder kun så længe man ikke kører
RAID.

Iøvrigt så gælder følgende for et system med K7-700Mhz (well 735Mhz...):

sslug@sslug /root]# hdparm -i -t -T /dev/hdb

/dev/hdb:

 Model=IBM-DTTA-371010, FwRev=T77OA70B, SerialNo=WL0WL045664
 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=34
 BuffType=3(DualPortCache), BuffSize=465kB, MaxMultSect=16, MultSect=off
 DblWordIO=no, maxPIO=2(fast), DMA=yes, maxDMA=2(fast)
 CurCHS=16383/16/63, CurSects=-66060037, LBA=yes
 LBA CHS=1023/256/63 Remapping, LBA=yes, LBAsects=19746720
 tDMA={min:120,rec:120}, DMA modes: sword0 sword1 sword2 mword0 mword1
mword2 
 IORDY=on/off, tPIO={min:240,w/IORDY:120}, PIO modes: mode3 mode4 
 UDMA modes: mode0 mode1 *mode2

 Timing buffer-cache reads:   128 MB in  0.80 seconds =160.00 MB/sec
 Timing buffered disk reads:  64 MB in  5.10 seconds =12.55 MB/sec
sslug@sslug /root]# 


/Reiche



 
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