On Thursday, May 13, 2004, at 03:56 PM, Greg & Rachel Olson wrote:
Most apples and mac compatibles were 50pin scsi internal which is a ribbon cable like an ATA. ATA is 40pin, SCSI, SCSI-2 are 50pin. Newer 68pin (scsi-3 and ultra scsi, adaptec 29xx/39xx series) and 80pin SCA are backward compatible with original scsi. Only ones you have to watch out for are the LVD (Low Voltage Differential) drives which are not compatible with original scsi chains.
No this is wrong. The incompatible drives/controllers are High Voltage Differential or HVD. LVD drives when connected to an SE (Single Ended or 'regular' SCSI) will auto negotiate themselves down to the SE standard. It is part of the LVD spec. HVD are not compatible with either LVD or SE SCSI. Plugging an SE drive into an HVD controller *will* let the magic smoke out of the drive and possibly the controller as well.
-- Mike N
Proof that cats are smarter than dogs. You will *never* see 8 cats trying to drag a sled through a blizzard.
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