Re: jumper settings on optical drives
Interesting info thanks peterh... Just to close this thread, (although it seemed too have died anyway!) I was having a problem with the new DVD drive tray fouling the gap in the MDD case, (I had done all testing with the cage loose and accessible, and the MDD opened to the elements). As it was a one- piece tray it was a question of Dremelling it or the case (both of which I was loath to do). anyway got a DVD drive BNIB at a car boot sale on Sunday with a detachable tray front...installed that and now the 'eject' icon correctly shows both drives, and works properly (the new one is a "Speedy" H16X - shows generic drivers installed under "Disk Burning" in System Profiler). Not tried burning yet but it works perfectly now as a R1 DVD drive for my movies! It is jumpered as slave and the other as master. Dan On Feb 3, 3:56 pm, peterh...@cruzio.com wrote: > > I did try drive 0 as slave and 1 as master - no change, also both as > > cable select - no difference. > > Is it perhaps a firmware issue, either with the G4 or the non-Apple > > drives perhaps? > > Early optical drives installed by Apple preferred Master, even though the > optical cable is indeed of the Cable Select type. These drives would not > work as Slave, just as the early Zips installed by Apple preferred Master, > too, which is why the early Beige G3s had SCSI Zips, if the Zip option was > chosen by the customer. Or, Apple ordered special versions of Zips which > WOULD work as Slaves, until Iomega finally fixed their flawed drives. > > Today, drives are a commodity, and there is very little difference between > them ... all are dual-layer burners and all will work properly as Master, > Slave or Cable Select, as is required by the customer, and at the > customer's sole option. > > The optical (and HD) bus cable is Cable Select for the simple reason that > the firmware is using H-P's patented method of detecting the presence of a > drive, detecting the drive's performance characteristics, and programming > the host bus adapter appropriately. > > However, after POST, the machine does not use Cable Select, it uses Master > and Slave. > > Interested readers can consult US Pat 6,523,071 for the details, which > teaches how a specific drive can be placed into a reset state, > interrogated, and the host bus adapter (the Mac itself, in this case) can > be programmed to best handle the drive. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: jumper settings on optical drives
> I did try drive 0 as slave and 1 as master - no change, also both as > cable select - no difference. > Is it perhaps a firmware issue, either with the G4 or the non-Apple > drives perhaps? Early optical drives installed by Apple preferred Master, even though the optical cable is indeed of the Cable Select type. These drives would not work as Slave, just as the early Zips installed by Apple preferred Master, too, which is why the early Beige G3s had SCSI Zips, if the Zip option was chosen by the customer. Or, Apple ordered special versions of Zips which WOULD work as Slaves, until Iomega finally fixed their flawed drives. Today, drives are a commodity, and there is very little difference between them ... all are dual-layer burners and all will work properly as Master, Slave or Cable Select, as is required by the customer, and at the customer's sole option. The optical (and HD) bus cable is Cable Select for the simple reason that the firmware is using H-P's patented method of detecting the presence of a drive, detecting the drive's performance characteristics, and programming the host bus adapter appropriately. However, after POST, the machine does not use Cable Select, it uses Master and Slave. Interested readers can consult US Pat 6,523,071 for the details, which teaches how a specific drive can be placed into a reset state, interrogated, and the host bus adapter (the Mac itself, in this case) can be programmed to best handle the drive. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: jumper settings on optical drives
The MDD should show both optical drives (mine does); the first and easiest thing I would try is to blow out both drives with a can of compressed gas. Sometimes a little dust gets in and interferes with the laser just enough to mess with you. On Feb 3, 5:48 am, Deiniol ap Deiniol wrote: > Hi Group: > When I got my dual 1.2GHz MDD a few months ago, I found it had two > optical drives fitted, although only the upper one was functional. > Clicking the 'open drive' icon showed one drive: the button always > opened the top one and sometimes the lower one would open too. As I > had it out of service today to install my newly acquired SCSI card > (and that's another story - showed up in Profiler but no OSX drivers > available), I decided to replace the non-functioning drive. > I removed the drive cage, and then I noticed that both drives were > jumpered as 'Master'. > "Ahah!" I thoughtthat's why drive 1 isn't working, so I jumpered > it as slave and restarted the machine. > And suddenly I had two DVD drives showing when I clicked on the "open > Drive" button.and reacting individually."Great" I thought, but > drive 1 still wouldn't recognise any optical media I put in it. > So pretty obviously borkedpossibly a non-operative laser...the > drive is a Sony combo drive dated October 2003 so quite likely to have > expired. > Having an old DVD ROM that came out of my dead Sawtooth, I decided to > try that. > Jumpered as 'Slave' I fitted it and tried a reboot. > No joy, and I no longer had two drives showing in the drive open > button. > But I did have another DVD ROM that I had bought BNIB from a thrift > shop some months ago. > That went in, showed up in System Profiler as a Lite-on DVD SHD - > 16P1S rev. GS07, but again was not showing on the button, and I could > only open it by pressing the 'open' button on the front of the drive. > But when I put a DVD in I got the 'Assign Region Code" screen, so that > was set to R1, because I have quite a few of those, and since the > machine has the 128MB GeForce Ti Graphics card (what a monster: > straddles the PRAM battery and runs the length of the machine!) > driving a 21" Mac CRT monitor, it's excellent for media (and I have a > choice of MacPro speakers or LaCie Firewire speakers so it sounds OK > too!). > > It plays perfectly, and will open by ejecting the disc from the > Desktop. > I watched my just-bought "In the heat of the night" (twice: second > time with commentary - that's why I like R1 discs!): I then ripped it > with Mac the Ripper, and that file plays absolutely perfectly with > VLC. > This new drive doesn't show in Disk utility either, but the other > drive (TSST corp CD/DVDW TS-H552U rev. US06) does and (almost) always > has worked fine. > I don't know if it's relevant, but I got an unopened copy of iLife > 08 last week, and the DVD of that would NOT mount on this machine > (tried 3 or 4 times, including after a reboot - sounded like it was > spinning up then down again: the iWork trial CD; also brand new, > opened fine, as did two different movie DVD's) although this iLife > DVD worked perfectly on my G4 iMac > So any thoughts as to what may be going on here? I tried resetting > PRAM on the off chanceI know clutching at a straw!...obviously no > difference, and also tried a safe boot in case it was a cache issue: > again zilch! > > Running 10.5.8 with 2GB memory, and two 160 GB hard drives, one > original one new.. > > I did try drive 0 as slave and 1 as master - no change, also both as > cable select - no difference. > Is it perhaps a firmware issue, either with the G4 or the non-Apple > drives perhaps? > Hoping someone here has a solution to this little mystery. > > Dan -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
jumper settings on optical drives
Hi Group: When I got my dual 1.2GHz MDD a few months ago, I found it had two optical drives fitted, although only the upper one was functional. Clicking the 'open drive' icon showed one drive: the button always opened the top one and sometimes the lower one would open too. As I had it out of service today to install my newly acquired SCSI card (and that's another story - showed up in Profiler but no OSX drivers available), I decided to replace the non-functioning drive. I removed the drive cage, and then I noticed that both drives were jumpered as 'Master'. "Ahah!" I thoughtthat's why drive 1 isn't working, so I jumpered it as slave and restarted the machine. And suddenly I had two DVD drives showing when I clicked on the "open Drive" button.and reacting individually."Great" I thought, but drive 1 still wouldn't recognise any optical media I put in it. So pretty obviously borkedpossibly a non-operative laser...the drive is a Sony combo drive dated October 2003 so quite likely to have expired. Having an old DVD ROM that came out of my dead Sawtooth, I decided to try that. Jumpered as 'Slave' I fitted it and tried a reboot. No joy, and I no longer had two drives showing in the drive open button. But I did have another DVD ROM that I had bought BNIB from a thrift shop some months ago. That went in, showed up in System Profiler as a Lite-on DVD SHD - 16P1S rev. GS07, but again was not showing on the button, and I could only open it by pressing the 'open' button on the front of the drive. But when I put a DVD in I got the 'Assign Region Code" screen, so that was set to R1, because I have quite a few of those, and since the machine has the 128MB GeForce Ti Graphics card (what a monster: straddles the PRAM battery and runs the length of the machine!) driving a 21" Mac CRT monitor, it's excellent for media (and I have a choice of MacPro speakers or LaCie Firewire speakers so it sounds OK too!). It plays perfectly, and will open by ejecting the disc from the Desktop. I watched my just-bought "In the heat of the night" (twice: second time with commentary - that's why I like R1 discs!): I then ripped it with Mac the Ripper, and that file plays absolutely perfectly with VLC. This new drive doesn't show in Disk utility either, but the other drive (TSST corp CD/DVDW TS-H552U rev. US06) does and (almost) always has worked fine. I don't know if it's relevant, but I got an unopened copy of iLife 08 last week, and the DVD of that would NOT mount on this machine (tried 3 or 4 times, including after a reboot - sounded like it was spinning up then down again: the iWork trial CD; also brand new, opened fine, as did two different movie DVD's) although this iLife DVDworked perfectly on my G4 iMac So any thoughts as to what may be going on here? I tried resetting PRAM on the off chanceI know clutching at a straw!...obviously no difference, and also tried a safe boot in case it was a cache issue: again zilch! Running 10.5.8 with 2GB memory, and two 160 GB hard drives, one original one new.. I did try drive 0 as slave and 1 as master - no change, also both as cable select - no difference. Is it perhaps a firmware issue, either with the G4 or the non-Apple drives perhaps? Hoping someone here has a solution to this little mystery. Dan -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
