andy at globalauctions
Jan 26, 1998, 10:53 PM
On Tue, 27 Jan 1998, Andy Thomson wrote:
I suppose introductions are in order now...
[In reply to]
> The "shared" or common drive implementation is a little more difficult to
> do in Linux. In tests, I used a single external scsi drive with two
> connectors, one for the primary system, and one for the secondary. The
> primary's scsi adapter was set for an address of 7, the secondary's
> was set to an address of 6, and the drive was set to an address of 1. As
> to be expected there were some problems with the setup, scsi termination,
> and scsi termination power source. However it did allow me to conduct a
> proof of concept evaluation. (it worked)
> Now it is much easier to implement, as many disk drives support active
> termination. I just recently acquired a Quantum drive that does active
> termination, and I am anxious to test it out. I intend to have the Quantum
> provide termination power. The theory is, if either the primary or secondary
> system fails, the Quantum drive will automatically sense the loss of
> termination, and correctly supply it.
Wouldn't external termination (rather than the system SCSI controllers
providing termination internally) avoid this problem altogether?