Alexander Dalloz wrote:
Am Mi, den 25.02.2004 schrieb Allan Metts um 14:46:
At 05:29 AM 2/25/2004, Alexandre Oliva wrote:
Yes. IDE doesn't permit simultaneous access to disks on the same
controller. Well, you could make do with two disks on a single
controller, but performance would be terrible.
Okay, two IDE identical drives -- one will be the Master on the Primary
controller, the other will be the Master on the Secondary controller.
Next question: Will it hurt anything to put the CDROM drive as the Slave on
the secondary controller? This is a no-no in the SCSI world, since I think
it slows the entire bus down to the speed of the slowest device. But I
need a CDROM to actually install Fedora, and I'd rather not buy an
additional controller....
That's not true. 99% of SCSI-based CDROMs support detatched operation.
It does not slow down the bus except when the CD-ROM is transferring
data. Bus speed is managed by the handshake between the initiator and
the target. If you have an ultra-SCSI disk on the same bus as a CD,
the bus will run at ultra-SCSI speed when the disk and controller are
talking and at the slow speed with the CD and controller are talking.
It's no problem to have a CD-ROM as slave together with a harddrive on
the same controller. It will not slow down the whole controller.
That's also true. IDE and SCSI are handled by a handshake and speed
negotiation. The bus adapts speeds based on what's talking to what.
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