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Daisy chain FW 800 issues!

1754 Views 8 Replies Latest reply: Jun 29, 2013 8:42 AM by joechristo RSS
Luca12 Calculating status...
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Jun 13, 2011 11:46 AM

I'm having problems getting my ext. hard drives to daisy chain via the FW 800 ports! Sometimes it will connect the first drive but when I try to daisy chain a 2nd drive to the 1st, it either bumps it off or does nothing, and it worked a few hours ago!D

PowerMac
  • Don Archibald Level 10 Level 10 (101,125 points)
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    Jun 13, 2011 12:10 PM (in response to Luca12)

    Are each of the drives equipped with its own external power supply?

     

    Are all of the drives FW800?

  • Don Archibald Level 10 Level 10 (101,125 points)
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    Jun 13, 2011 12:44 PM (in response to Luca12)

    Any firewire device which needs to use bus power (rather than having its own power supply) should be connected upstream (closer to the Mac's port) than devices which do have their own power supply.

     

    I prefer to use FW devices which have their own power supplies. This removes the burden on the bus (hence the Mac's power supply) from needing to supply power.

     

    Have you tried shutting the machine down, connecting the FW drives, then booting up? Sometimes this works because it forces the machine to recognize (via bus scans) and configure itself to everything connected at that time. Inconvenient, yes, but if the config is semi-permanent, having to do that once in a while is not too bothersome.

  • Don Archibald Level 10 Level 10 (101,125 points)
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    Jun 13, 2011 2:03 PM (in response to Luca12)

    Sometimes there can be 'voodoo' involved with firewire drives, similar to oddities with SCSI drives in past eras. This can be caused by differences in cabling, more probably by quirks in manufacturers' renditions of firewire hardware.

     

    I realize that's a non-answer, but sometimes when you get a config that works that's where you leave it.

  • geertvanasbrouck Calculating status...
    Currently Being Moderated
    Jun 12, 2012 12:37 PM (in response to Luca12)

    1 more question concerning the same subject:

    I am trying to daisy chain 2 identical lacie 1T ext. hard drives with firewire 800 to 1 port on the mac, runnibg with OSX. (1 is formatted FAT32 and 1 is formatted for mac). I connected everything as explained above (first drive to the mac, 2nd drive to the first one, both have separate power supplies), but when I switch power on,  I can see on my desktop only the first drive (connected directly to my mac) but not the 2nd one. The blue light on the drive is burning on the first one, but is flashing on the 2nd...

    I never did this before, What am I doing wrong?

    Thanks

  • joechristo Calculating status...
    Currently Being Moderated
    Jun 29, 2013 8:42 AM (in response to Luca12)

    Yeah

    I have been doing Data management

    For several years now

    And I used to daisy chain gdrive minis and LaCie ruggeds

    All the time, suddenly in the last 6 months

    It doesn't allow these mini type drives

    To see 2 drives simultaneously

     

    I can even pass through one drive and give the

    2nd drive juice and read it and copy files to it.

     

    But you can't do the simultaneous copies that was commonplace a year ago

     

    This process is used for copying digital video files

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