[5318] in linux-scsi channel archive
Re: Dumb question: Which is "better" SCSI or IDE disks?
daemon@ATHENA.MIT.EDU (Leonard Zhang System Administrator)
Sun Dec 6 10:57:46 1998
Date: Sun, 6 Dec 1998 21:00:20 +1000 (AEST)
From: Leonard Zhang System Administrator ISD RVIB <leonardz@rvib2.rvib.org.au>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
cc: leighton@mail.imake.com, linux-kernel@vger.rutgers.edu,
linux-scsi@vger.rutgers.edu
In-Reply-To: <m0zmMcn-0007U1C@the-village.bc.nu>
Please don't multiple post, I have already got it.
Leonard
On Sat, 5 Dec 1998, Alan Cox wrote:
> > 1. Some hard disk manufactures are using same disk drive (physically) to
> > make SCSI and ATA. They only change the PCB board.
> >
> > 2. SCSI-1 and SCSI-2 have 8 bit data bus, while ATA have 16 bit data bus.
> >
> > 3. ATA got disk cache built in as well.
> >
> > 4. Some low end of SCSI host card is only 8 Bit card.
> >
> > Compare by yourself.
>
> I have done several times. On my Cyrix MII box the IDE drive wins on bulk
> data (ie hdparm tests). It seems to be slightly lower CPU load than the
> SCSI controller too. When it comes to doing real work building a kernel
> with /usr/src on SCSI is about 20% faster than on IDE - this is a 5400rpm
> IBM scsi drive (DCAS-34330) on a buslogic 946 (ie fast not even ultra
> scsi) and narrow not wide.
>
> Most of my drives are still IDE, because I don't build kernels on them all..
>
> Alan
>
>
>
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
> the body of a message to majordomo@vger.rutgers.edu
>
-
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@vger.rutgers.edu
