Re: IDE/ATAPI

From: Andre Hedrick (andre@linux-ide.org)
Date: Sat Apr 22 2000 - 07:33:24 EDT

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    On Wed, 19 Apr 2000, Mark Hahn wrote:

    >
    > first, let me apologize for reincarnating this thread; I assumed
    > that everyone realized that modern IDE is quite usable, that is,
    > busmastering, supports scatter-gather, CRC's in UDMA mode, etc.

    THANK YOU!!!!!!!!!!

    > DMA/UDMA ide has _no_ problem with CPU load, nor with page faults
    > during cdrom transactions. as for the disconnect feature, sure,
    > only a few recent IBM disks support it. if it helps you sleep,
    > just ignore the existence of IDE slaves entirely.
    >
    > summary: current IDE disks sustain 15-30 MB/s with minimal overhead,
    > with cost asymptotic to $US 8/GB. current SCSI disks are even faster,
    > and certainly superior for many-device systems, but have both higher
    > entry cost (controllers), and cost 2-3x per GB.

    DIE THREAD..........

    Andre Hedrick
    The Linux ATA/IDE guy

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