Phil Barila
Guest
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 Posted:
Wed Dec 01, 2004 8:46 am Post subject:
Re: SATA drive on SCSI bus |
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"Peter H." <peterh5322@aol.comminch> wrote in message
news:20041128014252.07763.00001434@mb-m01.aol.com...
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The original ATAPI is the old IBM AT ST506/Western digital
controller interface connected via an extension of a IBM AT 16 bit
parallel IO bus.
Nonsense, ATAPI (AT Attachment with Packet Interface) didn't exist
until the 4th revision of the ATA standard.
ATAPI is still just an extension of the IBM AT's old 16 bit IO bus.
Not even close to any the parallel SCSI standards..
ATAPI is simply putting all the functionality of a WD-1003 controller on
the
drive.
The controller in the AT was a WD-1003.
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You are confusing ATA and ATAPI. ATA is the 16 bit bus. It's also a
reference to devices on that bus that don't implement the ATAPI (ATA with
Packet Interface)(Look at the upper case letters there, it's not accidental)
command set. The Packet command set is a limited implementation of SCSI.
The command set for an ATAPI CD is defined by the T10 MMC, the command set
for ATAPI tapes is defined by SSC, etc.
Phil
--
Philip D. Barila Windows DDK MVP
Seagate Technology LLC
(720) 684-1842
As if I need to say it: Not speaking for Seagate.
E-mail address is pointed at a domain squatter. Use reply-to instead. |
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