Daisy Chain Problem
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From: Nick Naym on 11 Apr 2010 16:48 I had two external FW drives (Seagate/Icy Dock for TM; and LaCie d2 Quadra for SuperDuper!) connected in a daisy chain to my iMac. The Seagate/Icy Dock is closest to the iMac, and the LaCie is daisy-chained off of it. I received two additional FW drives (larger LaCie d2 Quadras) as gifts over the past couple of weeks. The first one arrived last week; I shut down my iMac, installed the drive in the daisy chain, and rebooted without any problems. The second one arrived a couple of days ago, and I installed that one as well. However, initially, the Seagate/Icy Dock didn't show up (either on my Desktop nor in Disk Utility) when I rebooted (all the others in the chain did). I shut everything down again, checked the connections to/from the Seagate/Icy Dock, powered everything up and rebooted. Everything then seemed to be OK. Now, however, it (the Seagate/Icy Dock) is not showing up. Obviously, the system knows it's there -- after all, it's the first one in the daisy chain, and the others are showing up on my Desktop and are fully operational. I just checked System Profiler, and it offers details on each of the drives in the chain, except for the Seagate/Icy Dock. For that, it indicates: Unknown Device: GUID: 0x0 Maximum Speed: Up to 800 Mb/sec Connection Speed: Unknown Comments or suggestions? -- iMac (27", 3.06 GHz Intel Core 2 Duo, 4 GB RAM, 1 TB HDD) � OS X (10.6.3)
From: nospam on 11 Apr 2010 16:53 In article <C7E7ADDD.587AF%nicknaym@_remove_this_gmail.com.invalid>, Nick Naym <nicknaym@_remove_this_gmail.com.invalid> wrote: > I had two external FW drives (Seagate/Icy Dock for TM; and LaCie d2 Quadra > for SuperDuper!) connected in a daisy chain to my iMac. The Seagate/Icy Dock > is closest to the iMac, and the LaCie is daisy-chained off of it. > > I received two additional FW drives (larger LaCie d2 Quadras) as gifts over > the past couple of weeks. The first one arrived last week; I shut down my > iMac, installed the drive in the daisy chain, and rebooted without any > problems. there's no need to shut down. firewire is hot-pluggable. > The second one arrived a couple of days ago, and I installed that one as > well. However, initially, the Seagate/Icy Dock didn't show up (either on my > Desktop nor in Disk Utility) when I rebooted (all the others in the chain > did). I shut everything down again, checked the connections to/from the > Seagate/Icy Dock, powered everything up and rebooted. Everything then seemed > to be OK. some firewire bridges are not as good as others and not necessarily fully compliant. you may have one or more such bridges in the chain.
From: Nick Naym on 11 Apr 2010 19:49 In article 110420101353165309%nospam(a)nospam.invalid, nospam at nospam(a)nospam.invalid wrote on 4/11/10 4:53 PM: > In article <C7E7ADDD.587AF%nicknaym@_remove_this_gmail.com.invalid>, > Nick Naym <nicknaym@_remove_this_gmail.com.invalid> wrote: > >> I had two external FW drives (Seagate/Icy Dock for TM; and LaCie d2 Quadra >> for SuperDuper!) connected in a daisy chain to my iMac. The Seagate/Icy Dock >> is closest to the iMac, and the LaCie is daisy-chained off of it. >> >> I received two additional FW drives (larger LaCie d2 Quadras) as gifts over >> the past couple of weeks. The first one arrived last week; I shut down my >> iMac, installed the drive in the daisy chain, and rebooted without any >> problems. > > there's no need to shut down. firewire is hot-pluggable. > >> The second one arrived a couple of days ago, and I installed that one as >> well. However, initially, the Seagate/Icy Dock didn't show up (either on my >> Desktop nor in Disk Utility) when I rebooted (all the others in the chain >> did). I shut everything down again, checked the connections to/from the >> Seagate/Icy Dock, powered everything up and rebooted. Everything then seemed >> to be OK. > > some firewire bridges are not as good as others and not necessarily > fully compliant. you may have one or more such bridges in the chain. I've had the Seagate/Icy Dock and the LaCie since September 2008, and they've both performed flawlessly. The two new LaCies are the same model as the 2008 model, except larger capacities. I can only _assume_ that LaCie hasn't suddenly decided to change a successful design by slapping in inferior components. I realize that the 1.5-year-old Seagate or Icy Dock could suddenly have crapped out on me; or that one of the two new LaCies is somehow defective. It also could be a Mac problem, notwithstanding the fact that it's a brand-new machine. But since all of these items seem to be equally likely "it could be" candidates however, I have no idea how to narrow it down. -- iMac (27", 3.06 GHz Intel Core 2 Duo, 4 GB RAM, 1 TB HDD) � OS X (10.6.3)
From: Erik Richard Sørensen on 11 Apr 2010 20:26 Nick Naym wrote: > nospam at nospam(a)nospam.invalid wrote on 4/11/10 4:53 PM: >> Nick Naym <nicknaym@_remove_this_gmail.com.invalid> wrote: >>> I had two external FW drives (Seagate/Icy Dock for TM; and LaCie d2 Quadra >>> for SuperDuper!) connected in a daisy chain to my iMac. The Seagate/Icy Dock >>> is closest to the iMac, and the LaCie is daisy-chained off of it. >>> >>> I received two additional FW drives (larger LaCie d2 Quadras) as gifts over >>> the past couple of weeks. The first one arrived last week; I shut down my >>> iMac, installed the drive in the daisy chain, and rebooted without any >>> problems. >> there's no need to shut down. firewire is hot-pluggable. >> >>> The second one arrived a couple of days ago, and I installed that one as >>> well. However, initially, the Seagate/Icy Dock didn't show up (either on my >>> Desktop nor in Disk Utility) when I rebooted (all the others in the chain >>> did). I shut everything down again, checked the connections to/from the >>> Seagate/Icy Dock, powered everything up and rebooted. Everything then seemed >>> to be OK. >> some firewire bridges are not as good as others and not necessarily >> fully compliant. you may have one or more such bridges in the chain. > > I've had the Seagate/Icy Dock and the LaCie since September 2008, and > they've both performed flawlessly. The two new LaCies are the same model as > the 2008 model, except larger capacities. I can only _assume_ that LaCie > hasn't suddenly decided to change a successful design by slapping in > inferior components. > > I realize that the 1.5-year-old Seagate or Icy Dock could suddenly have > crapped out on me; or that one of the two new LaCies is somehow defective. > It also could be a Mac problem, notwithstanding the fact that it's a > brand-new machine. But since all of these items seem to be equally likely > "it could be" candidates however, I have no idea how to narrow it down. What happens if you put the IcyDock as the last unit in the chain? - Try also to delete the DiskUtility prefs file from username/library/preferences - before turning on the power on any of the external units. - Have you run 'Repair Pe3rmissions' after daisy chaining all units? - Have you tried using other FW cables? - Are you sure that all the cables are full corded cables? ...Just my first thoughts... I once had the near same problem with my professional LaCie d2 music CD burner with a daisy chained Archos external harddisk that wouldn't mount though it was visible in both Systemprofile and DiskUtility. In my case it was a defective FW cable so exchanged the cable with another one the problem was gone.... Cheers, Erik Richard -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Erik Richard Sørensen, Member of ADC, <mac-manNOSP(a)Mstofanet.dk> NisusWriter - The Future In Multilingual Text Processing - www.nisus.com OpenOffice.org - The Modern Productivity Solution - www.openoffice.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
From: nospam on 11 Apr 2010 20:37
In article <C7E7D830.587E3%nicknaym@_remove_this_gmail.com.invalid>, Nick Naym <nicknaym@_remove_this_gmail.com.invalid> wrote: > I've had the Seagate/Icy Dock and the LaCie since September 2008, and > they've both performed flawlessly. The two new LaCies are the same model as > the 2008 model, except larger capacities. I can only _assume_ that LaCie > hasn't suddenly decided to change a successful design by slapping in > inferior components. why not? lacie uses whatever is cheap and available. there's no guarantee what you get. it's also not necessarily inferior. they might work ok with n devices on the chain. maybe it's within spec, but borderline enough that n+1 devices causes a problem. |