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Ben Myers wrote:
Steve, The master drive in a two-drive master-slave setup provides the controller mechanism for the second drive. The IDE (actually I/O) chip on the motherboard provides minimal intelligence. This is true even with the "cable select" type of jumpering. With cable select, the cable construction determines which drive is master and which is slave. If you hold a "cable select" type of IDE cable up to the light, you will see that one of the wire traces is cut. The the presence or lack of current on this wire which tells the drive to spin up as master or as slave... Ben Myers I think you will find the "cut", (which is not required for all cables), is in the wire to pin 34. This is part of CBLID, which identifies ATA/66/100 cables. The cable select is done by pin 28, (CSEL), which is grounded at the master connector and open at the slave connection. The drives should both be jumpered to "cable select". Virg Wall -- A foolish consistency is the hobgoblin of little minds,........ Ralph Waldo Emerson (Microsoft programmer's manual.) |
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Thanks for the replies.
Both drives are configured as "cable select". Any other thoughts? Thanks! Steve "Tacitus" wrote in message .. . "Steve Byers" wrote in message m... I recently had to replace the hard drive in my Compaq Presario 7478. I have the new hard drive working but have what I think is a strange problem. I have connected the new drive to the connector marked "Drive 0" from the motherboard, but when I attach the "Drive 1" connector to my old hard drive, or to the Zip drive that was in that slot before, the computer does not find the new drive. The boot configuration only lists a Drive 2 and no Drive 1. Did I connect a ribbon to the wrong mother board spot or what?? Any ideas? Thanks! Steve Be careful of your master/slave configuration. Each IDE channel should accomodate 2 devices, a master and a slave, on its ribbon cable. Generally speaking, these devices (drives) have a jumper that defines the status. Your old drive was undoubtedly a master. If you now make it a slave, you must change its jumper accordingly. The new drive must also have a jumper that makes it a master and allows for a slave connection. Tac |
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