Firewire port not suplying energy wen runing only with battery

Hi all,
since today I v noticed that if my MBP is not connected to the power adaptor
will not suply energy any more to the Firewire 400 port (the only one I have ).
This is a problem because I am often working with ext drive on the run...
any idea on why this is happening ?
I v just got back my laptop back from the Apple store were they have replaced the
optical drive and they v told me that firewire port was working fine.( I was suspecting something cauz I v had several hardrive unmounting without any reason).
Now that my laptop came back there is this issue...
best
Shiama

Your computer should provide power to the Firewire port when running on battery as long as the computer is not shut down or sleeping, shiama. If it is sleeping or shut down then it will only provide power when the power adaptor is plugged in.
You could try resetting the SMC and PRAM . Perhaps try another FW cable to make sure that this is not the cause of your problems, though I presume, from what you say, that power is supplied to the FW drive normally if the power adaptor is plugged in.
Some supposedly bus powered FW drives may need more current than the battery alone can support though. What brand and model is the drive? Has it worked off battery alone before? Are any other devices attached, and were you running software that places a heavy demand on the CPU or Graphics processor when the external drive was in use?
Cheers
Rod

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Hello People, i´ve just got a new Mac Mini last week, and i´ve been trying to get my Alesis MasterControl audio interface, and is just a complete mess.
This happened right after i´ve upgraded to 10.8.3 so i don´t know, the weird thing is that if i connect my old iBook to the Mac Mini the FW800 port works, but everytime i connect the audio interface, nothing happens, also the drivers from alesis, are up to date. i first thought about the port of the Mixer went bad, but it has 2 and non of them works, also thought about the cable but the same cable works when i connect my iBook, and the mixer is not bus powered, it has it´s own power supply.
Needless to say i´ve already done the usual reset PRAM, turn of the Mac unplugged for 30 hour to reset the bus. etc.
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31/03/13 08:01:20.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in now active, GUID 003ee1fffe88dc6a; max speed s800.
31/03/13 08:01:30.000 kernel[0]: Alesis Firewire - 3.5.6.11675 (x86_64) Aug 16 2011 01:20:23
31/03/13 11:33:23.529 system_profiler[528]: SPFWR ERROR: FireWire bus may be unstable. Other FireWire devices may be present.
31/03/13 11:35:43.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 11:38:55.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 11:42:08.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 11:44:39.124 CleanMyMacHelperTool[583]: Mounted devices (
    "/Volumes/AlesisFirewire-3.5.3.8671"
31/03/13 11:44:39.146 CleanMyMacHelperTool[583]: Wont clean /Volumes/AlesisFirewire-3.5.3.8671 because disk image
31/03/13 11:44:39.148 CleanMyMacHelperTool[583]: Mounted devices (
    "/Volumes/AlesisFirewire-3.5.3.8671"
31/03/13 11:44:39.149 CleanMyMacHelperTool[583]: Wont clean /Volumes/AlesisFirewire-3.5.3.8671 because disk image
31/03/13 11:44:52.727 coreservicesd[62]: Application App:"AlesisFirewireUninstaller" [ 0x0/0x7f07f] @ 0x0x7fb5c8c30050 tried to be brought forward, but isn't in fPermittedFrontASNs ( ( ASN:0x0-0x80080:) ), so denying.
31/03/13 11:44:52.727 WindowServer[85]: [cps/setfront] Failed setting the front application to AlesisFirewireUninstaller, psn 0x0-0x7f07f, securitySessionID=0x186a5, err=-13066
31/03/13 11:47:28.533 CleanMyMacHelperTool[656]: Mounted devices (
    "/Volumes/AlesisFirewire-3.5.3.8671",
    "/Volumes/AlesisFirewire-3.5.6.11675"
31/03/13 11:47:28.544 CleanMyMacHelperTool[656]: Mounted devices (
    "/Volumes/AlesisFirewire-3.5.3.8671",
    "/Volumes/AlesisFirewire-3.5.6.11675"
31/03/13 11:49:26.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 11:52:39.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 11:57:22.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in now active, GUID 003ee1fffe88dc6a; max speed s800.
31/03/13 11:57:34.000 kernel[0]: Alesis Firewire - 3.5.3.8671 preliminary - x86_64 CJ - May 3 2010 02:43:28
31/03/13 11:58:36.982 com.apple.launchd.peruser.501[155]: ([0x0-0x1d01d].tc.tctechnologies.AlesisFirewire.controlpanel[238]) Job appears to have crashed: Abort trap: 6
31/03/13 11:58:37.252 ReportCrash[242]: Saved crash report for AlesisFirewire Control Panel[238] version 3.5.3 (3.5.3.8671) to /Users/m1kygarcia/Library/Logs/DiagnosticReports/AlesisFirewire Control Panel_2013-03-31-115837_Mac-mini-de-Miguel.crash
31/03/13 11:58:39.831 system_profiler[267]: SPFWR ERROR: FireWire bus may be unstable. Other FireWire devices may be present.
31/03/13 11:58:50.676 com.apple.launchd.peruser.501[155]: ([0x0-0x23023].tc.tctechnologies.AlesisFirewire.controlpanel[274]) Job appears to have crashed: Abort trap: 6
31/03/13 11:58:50.837 ReportCrash[242]: Saved crash report for AlesisFirewire Control Panel[274] version 3.5.3 (3.5.3.8671) to /Users/m1kygarcia/Library/Logs/DiagnosticReports/AlesisFirewire Control Panel_2013-03-31-115850_Mac-mini-de-Miguel.crash
31/03/13 11:58:53.638 system_profiler[277]: SPFWR ERROR: FireWire bus may be unstable. Other FireWire devices may be present.
31/03/13 11:59:09.747 CleanMyMacHelperTool[300]: Mounted devices (
    "/Volumes/AlesisFirewire-3.5.6.11675"
31/03/13 11:59:09.905 CleanMyMacHelperTool[300]: Wont clean /Volumes/AlesisFirewire-3.5.6.11675 because disk image
31/03/13 11:59:09.906 CleanMyMacHelperTool[300]: Mounted devices (
    "/Volumes/AlesisFirewire-3.5.6.11675"
31/03/13 11:59:09.907 CleanMyMacHelperTool[300]: Wont clean /Volumes/AlesisFirewire-3.5.6.11675 because disk image
31/03/13 12:00:47.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in now active, GUID 003ee1fffe88dc6a; max speed s800.
31/03/13 12:00:59.000 kernel[0]: Alesis Firewire - 3.5.6.11675 (x86_64) Aug 16 2011 01:20:23
31/03/13 12:01:56.720 system_profiler[269]: SPFWR ERROR: FireWire bus may be unstable. Other FireWire devices may be present.
31/03/13 12:05:40.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 12:08:52.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 12:12:42.277 AlesisFirewire Control Panel[245]: -_continuousScroll is deprecated for NSScrollWheel. Please use -hasPreciseScrollingDeltas.
31/03/13 12:12:42.277 AlesisFirewire Control Panel[245]: -deviceDeltaX is deprecated for NSScrollWheel. Please use -scrollingDeltaX.
31/03/13 12:12:42.278 AlesisFirewire Control Panel[245]: -deviceDeltaY is deprecated for NSScrollWheel. Please use -scrollingDeltaY.
31/03/13 12:13:53.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 12:25:29.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in now active, GUID 003ee1fffe88dc6a; max speed s800.
31/03/13 12:25:38.000 kernel[0]: Alesis Firewire - 3.5.6.11675 (x86_64) Aug 16 2011 01:20:23
31/03/13 12:28:30.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 12:28:33.906 system_profiler[273]: SPFWR ERROR: FireWire bus may be unstable. Other FireWire devices may be present.
31/03/13 12:31:41.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 12:35:16.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in now active, GUID 003ee1fffe88dc6a; max speed s800.
31/03/13 12:35:26.000 kernel[0]: Alesis Firewire - 3.5.6.11675 (x86_64) Aug 16 2011 01:20:23
31/03/13 12:37:53.513 system_profiler[266]: SPFWR ERROR: FireWire bus may be unstable. Other FireWire devices may be present.
31/03/13 12:39:36.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in now active, GUID 003ee1fffe88dc6a; max speed s800.
31/03/13 12:39:49.000 kernel[0]: Alesis Firewire - 3.5.6.11675 (x86_64) Aug 16 2011 01:20:23
31/03/13 12:42:55.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: 53 bus resets in last 3 minutes.
31/03/13 12:46:50.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: 68 bus resets in last 3 minutes.
31/03/13 13:01:30.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in now active, GUID 003ee1fffe88dc6a; max speed s800.
31/03/13 13:01:41.000 kernel[0]: Alesis Firewire - 3.5.6.11675 (x86_64) Aug 16 2011 01:20:23
31/03/13 13:05:27.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: 79 bus resets in last 3 minutes.
31/03/13 13:06:31.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 13:09:43.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 13:13:31.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in now active, GUID 003ee1fffe88dc6a; max speed s800.
31/03/13 13:13:45.006 com.apple.kextd[11]: Can't load /System/Library/Extensions/IOFireWireIP.kext - ineligible during safe boot.
31/03/13 13:13:45.008 com.apple.kextd[11]: Load com.apple.iokit.IOFireWireIP failed; removing personalities from kernel.
31/03/13 13:13:54.818 com.apple.kextd[11]: Can't load /System/Library/Extensions/AlesisFirewire.kext - ineligible during safe boot.
31/03/13 13:13:54.823 com.apple.kextd[11]: Load tc.tctechnologies.driver.AlesisFirewire failed; removing personalities from kernel.
31/03/13 13:13:56.372 com.apple.kextd[11]: Can't load /System/Library/Extensions/AlesisFirewire.kext - ineligible during safe boot.
31/03/13 13:13:56.375 com.apple.kextd[11]: Load tc.tctechnologies.driver.AlesisFirewire failed; removing personalities from kernel.
31/03/13 13:15:40.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 13:18:46.763 com.apple.kextd[11]: Can't load /System/Library/Extensions/IOFireWireIP.kext - ineligible during safe boot.
31/03/13 13:18:46.768 com.apple.kextd[11]: Load com.apple.iokit.IOFireWireIP failed; removing personalities from kernel.
31/03/13 13:18:46.797 com.apple.kextd[11]: Can't load /System/Library/Extensions/AlesisFirewire.kext - ineligible during safe boot.
31/03/13 13:18:46.800 com.apple.kextd[11]: Load tc.tctechnologies.driver.AlesisFirewire failed; removing personalities from kernel.
31/03/13 13:18:50.775 system_profiler[221]: SPFWR ERROR: FireWire bus may be unstable. Other FireWire devices may be present.
31/03/13 13:18:52.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 13:21:03.488 system_profiler[235]: SPFWR ERROR: FireWire bus may be unstable. Other FireWire devices may be present.
31/03/13 13:22:37.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 13:24:07.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in now active, GUID 003ee1fffe88dc6a; max speed s800.
31/03/13 13:24:19.000 kernel[0]: Alesis Firewire - 3.5.6.11675 (x86_64) Aug 16 2011 01:20:23
31/03/13 13:31:00.926 system_profiler[316]: SPFWR ERROR: FireWire bus may be unstable. Other FireWire devices may be present.
31/03/13 13:33:03.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: 134 bus resets in last 3 minutes.
31/03/13 13:35:11.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 13:38:24.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 13:41:36.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 13:44:48.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 13:58:13.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
31/03/13 14:01:25.000 kernel[0]: FireWire (OHCI) TI ID 823f built-in: no valid selfIDs for more than 3 minutes after bus reset.
Can somebody help, please i´d gladly appreciate it.

I have this
System Profiler[170]
SPFWR ERROR: FireWire bus may be unstable. Other FireWire devices may be present.
& this
kernel FireWire (OHCI) Lucent ID 5901 built-in: no valid selfIDs for more than 3 minutes after bus reset.
Pls, help!!

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Verify that your computer ports are working with other known problem free device.

Firewire port not giving power consistently

I have used a portable fw drive for many years and I am now finding that this current MBP is not giving consistent power to my portable HD. Sometimes, it will power up all the way and mount and others times (most of the time now) it will seem to spin up the drive but, never enough to be recognized and mount. I checked the drive itself and it always works on other systems I plug it into so, I am worried something is amiss with my MBP
Is this a normal issue?

I was just searching the forum to see if anyone else had this issue.
I notice that sometimes my Firewire 400 audio device does not power on when connected to the MPB FW800 port (with an 800/400 cable). I'm still testing, but it seems to be when I don't have the power adaptor plugged into the MBP. The Macbook Pro needs a power cable to run a FW400 device maybe?
Its not an issue on my old 2006 MBP.

Firewire ports not working.

Hello I am new to Apple, i recently purchased an Imac ( 10.6.4 ) and a firewire solo audio interface, the interface isn't being recognised and i've tried all the recommended solutions but none have worked.
I recently found out about "hot plugging" and I think its possible i may have been too eager and plugged my interface in before the computer had completely shut down. The interface receives power from the mac still but it isn't recognised.
So far i've tried, installing newest sofware, reinstalling, verifying disk/disk permissions. Turning of the mac, unplugging for 10 minutes etc.
If anyone has suggestions as to ways of knowing if the port is actually damaged and if so if apple can replace my mac etc. (I'm within the 90 days purchase).
Any help or information would be much appreciated

Ugh... I am having exactly the same symptom on what is probably exactly the same machine.
The laptop recognizes the drive and deals with it.
The imac did so at first, but a couple of days ago it began to have trouble mounting it.
"About This Mac" sees it (sometimes even identifies its Oxford chipset) but no more progress. Disk Utility sees it sometimes, but no success mounting it either.
And just for kicks (you might want to try this too) I tried to boot the imac in firewire mode with the live laptop and although the system hard drive showed up in the laptop's Finder, Disk Utility could not begin to verify the drive before things got ugly. After that attempt the drive would not dismount properly and I had to--gasp--turn it off without doing so. Fortunately the imac booted up without a hitch.
Firewire, firewire...
mac Mac OS X (10.4.5)

Firewire port not suplying energy wen runing only with battery

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