Re: EIDE more reliable than SCSI?

Michael Neuffer (
Tue, 19 Nov 1996 22:01:37 -0800 (PST)

On Wed, 20 Nov 1996, Systemkennung Linux wrote:
> Another problem is that the SCSI command queues often a being filled up
> with commands from just one device. This results in making the SCSI bus
> temporarily unavailable to other targets and can be pretty annoying with
> tapes.

In the "recent" kernel versions this can at least with the eata-dma driver
not happen, since it uses the per-device queues to make sure that every
connected device can always have enough commands in the queue
to ensure that it can operate without having to wait for the queue to
free up.

Before the per-device queues, the sd driver tended to starve all other
device drivers by continously flooding the queue.


Michael Neuffer i-Connect.Net, a Division of iConnect Corp.
mike@i-Connect.Net 14355 SW Allen Blvd., Suite 140
503.641.8774 Beaverton, OR 97005