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adding a 2nd scsi HD to an older mac
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<blockquote data-quote="Badger" data-source="post: 41563"><p>1; generally yes, </p><p>2; you can use any open ID number,</p><p>3; physical position does not matter as long as ID and termination are correct,</p><p>4; during the bootup the computer searches the scsi chain looking for a working system, adding a device will add to the search sequence. If there is no system on the disk the search will continue, the extra delay will be minimal. Use the startup control panel to make sure the correct system folder/disk is selected. you can put different systems on different disks and switch between them. Normally, the 8600 is limited to OS 9.1 or older but it is possible to get around that limit. (See <a href="http://www.os9forever.com" target="_blank">www.os9forever.com</a>)</p><p>5; yes, however the Apple disk utility can install drivers during the re-format/initialization,</p><p>6; I don't know, but HFS+ is a logical format structure and should be independant of the disk type,</p><p>7; according to the Low End Mac site, the 8600 uses fast scsi on the internal bus and standard scsi on the external bus. (<a href="http://www.lowendmac.com" target="_blank">www.lowendmac.com</a>). I don't know if you can connect all versions of scsi (with adapters) to these busses.</p><p>8 & 9; don't know,</p><p>10; External scsi drives are the same types as internal drives. With the proper ID and termination scsi drives are plug & play BUT are not hot-swapable. Make sure you always shut down the drive and computer before connecting external drives.</p><p></p><p>The 8600 has separate scsi busses for the internal and external devices. So in theory you can have seven devices on each bus. Each bus has its own controller, J9 for the external (5mbs) and J10 for the internal (12mbs).</p><p>Good Luck.</p><p>Badger</p></blockquote><p></p>
[QUOTE="Badger, post: 41563"] 1; generally yes, 2; you can use any open ID number, 3; physical position does not matter as long as ID and termination are correct, 4; during the bootup the computer searches the scsi chain looking for a working system, adding a device will add to the search sequence. If there is no system on the disk the search will continue, the extra delay will be minimal. Use the startup control panel to make sure the correct system folder/disk is selected. you can put different systems on different disks and switch between them. Normally, the 8600 is limited to OS 9.1 or older but it is possible to get around that limit. (See [url]www.os9forever.com[/url]) 5; yes, however the Apple disk utility can install drivers during the re-format/initialization, 6; I don't know, but HFS+ is a logical format structure and should be independant of the disk type, 7; according to the Low End Mac site, the 8600 uses fast scsi on the internal bus and standard scsi on the external bus. ([url]www.lowendmac.com[/url]). I don't know if you can connect all versions of scsi (with adapters) to these busses. 8 & 9; don't know, 10; External scsi drives are the same types as internal drives. With the proper ID and termination scsi drives are plug & play BUT are not hot-swapable. Make sure you always shut down the drive and computer before connecting external drives. The 8600 has separate scsi busses for the internal and external devices. So in theory you can have seven devices on each bus. Each bus has its own controller, J9 for the external (5mbs) and J10 for the internal (12mbs). Good Luck. Badger [/QUOTE]
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