Daisy-Chained External Drive No Longer Mounting

I have two external hard drives daisy-chained (firewire 800) to my iMac. The hard drive directly connected my iMac mounts fine. The daisy-chained hard drive no longer mounts, after mounting perfectly fine for a few months. I've tried restarting, etc with no success. Any help would be appreciated.

moretoexplore wrote:
No, it does not mount directly. I did however try using the other hard drive's power cord and it mounted without problem. But this doesn't fix the problem.. only one drive is mounting. At least it seems I have ruled out a more serious problem with the drive itself. I'm contacting Lacie to get a new power cord. Hopefully, with a new power cord, this will resolve the issue and it isn't some sort of daisy-chain issue.
I think you have solved the problem by elimination.
You can prove that it's the power cord by using the "bad" one on the working drive. If it stops working, it's guaranteed to be the power cord.
I believe that there were some issues with some of the LaCie Power Supplies.
Message was edited by: nerowolfe

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Firewire 800 external drive no longer mounting

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Hi. Let's say I have an internal drive (drive A) in my MacBook Pro, an external drive (drive B) connected via FireWire 800 to my MacBook Pro, and another external drive (drive C) connected via FireWire 800 to the rear of drive B. All drives are formatted as HFS+. Drive B holds my iTunes library.
1. Can I use Time Machine to back up drive A onto drive C?
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http://www.amazon.com/HDD-Duplicator-Stand-Alone-Sata/dp/B002OTG0PO'
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Message was edited by: Pram

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After 10.5.6 Update, external drives no longer mount

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Bradleysp wrote:
For some time, I have been using a Western Digital external drive for my Time Machine back-ups. Sometime after the 10.5.6 upgrade (Dec), When I plugged in the drive I get a "USB Over Current Notice: A USB device is currently drawing too much power. The hub to which it is attached to will be deactivated."
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Again, the hub question. If you are using a powered hub perhaps its power supply brick is failing.
There is a discussion strand about a problem in Time Machine after the 10.5.6 upgrade, however, all the fixes posted assume that the drive will mount and you can then use the Terminal Application to repair a damaged file on the external drive.
I'm stuck. Any advice?
One step at a time
Luck-
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Daisy chain external drive?

I was looking into getting something like this:
http://www.overstock.com/Electronics/Coolmax-Aluminum-Hard-Drive-Enclosure/24790 01/product.html
for two computers to work on outside of a wireless/AirExtreme router where there isnt an option to connect a harddrive to the usb port. so i was wondering could potentially one computer be hooked up to the usb port of an external drive like this and the other via firewire and share and swap files if necessary or atleast access them?
or unless there is a more stable, reliable and better option, id love to hear any suggestions
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Hi AppleNewton;
You asked; "one computer be hooked up to the usb port of an external drive like this and the other via firewire and share and swap files if necessary or atleast access them?
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Okay, I know this has been asked a couple of times around the Discussion Boards, but I want to clarify and expand upon it.
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Hi grant862
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...Ohmmm madhi padhi ohmmm....

Can't daisy-chain Firewire drives reliably from 1-port Powerbook. Hub??

I have found that I cannot get a daisy-chained Firewire drive to mount more than 50% of the time. This problem doesn't happen with Tiger with the same drives. I have tried 4 different brands of late-model Firewire drives (Iomega, Smartdisk, Maxtor, and Seagate) with different cables and what happens is that a drive that is directly attached to the 12" Powerbook will mount, but the second chained drive fails to mount a majority of the time. Since I only have one Firewire port, this is preventing me from using more than one drive at a time, and I lost two Firewire drives to corruption today. Three out of four partitions lost contained bootable backups of Leopard and Tiger. Ouch!
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I have exactly the same problem !
I have found this :
Using Multiple FireWire Devices at the Same Time
Power Macintosh computers can transfer perfect digital video (DV) on FireWire when no other devices are using the FireWire bus. If you have problems transferring digital video, make certain that no other FireWire devices are being used at the same time. Turning on a DV camera that is already connected may cause a FireWire hard disk to stop working. If this happens, turn off the camera and verify that the hard disk has recovered. Then unplug the FireWire cable from the camera, turn the camera on, and reconnect the FireWire cable to the camera. Check with the hard disk vendor for a possible firmware update to prevent this problem.
here:
http://www.2ndwave.com/firewire.asp
At the moment I can't upset what I'm doing to test it but I intend to do that as soon as I finish copying transferring...
I have the following device attached to different firewire ports:
a firewire video device connecting my G5 Desktop to the TV screen
a firewire ibot
I thought I would give u a head start

Daisy-chain internal drives temporarily???

Hello! So after a western digital 1TB external drive failed on me I am looking to recover the data on my own. I have taken out the drives from external casing. Call them DRIVE A. I would like to daisy chain them through my iMac's current internal drive which we'll call DRIVE B. I have no need to copy the data from A to B. I just want to be able to get my computer to recognize A as another internal just temporarily so I can copy it all thru to a NEW external fire wire drive, DRIVE C.
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I have never daisy chained internal drives before and would really appreciate the communities guidance on accomplishing this. Thank you!

You should not open up your iMac, when there are far easier ways to do what you desire.
1. You can get an empty external drive (either FireWire or USB 2.0 or one that has both interfaces). Put A in that case. Copy off the data to B. Swap out A for C. Copy off the data from B to C.
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http://eshop.macsales.com/item/Newer%20Technology/U2NV2SPATA/
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External drive won't mount after plugging in iPhone - MacBook 13'' (2,1)

Hi Support Crew...
I have a 13" MacBook(2,1) running OS X 10.6.2. This is a 2 GHz Intel Core 2 Duo machine w/ 4 GB RAM & 320 GB hard drive.
Today, I had the Iomega drive plugged in via USB, along with my soundcard (MOTU 828mk2) plugged in via FW. This is a very normal setup for me which has been bug free since I bought this computer over 2 years ago. When I plugged in my iPhone 3G via USB I got an error message which comes up when you incorrectly remove a device. This was strange because I didn't unplug anything, I only plugged in the iPhone. The iPhone was playing music when I plugged it in and I had to unplug and plug is back in to get iTunes to recognize it.
Ever since this happened, my Iomega external drive won't mount. I am able to access it via Disk Utility (and ran the Verify Disk/Repair Disk - everything is "ok"), however I can't access the data on the drive. I really really need the data but of course can't access it to backup.
Disk Utility log:
500.11 GB Ext Hard Disk Media (black text)
Iris (grey text) - I ran Verify Disk & Repair Disk
2010-01-22 14:20:51 -0800: Verify and Repair volume “Iris”
2010-01-22 14:20:51 -0800: Starting repair tool:
2010-01-22 14:20:51 -0800: Checking Journaled HFS Plus volume.
2010-01-22 14:20:52 -0800: Checking extents overflow file.
2010-01-22 14:20:52 -0800: Checking catalog file.
2010-01-22 14:20:56 -0800: Checking multi-linked files.
2010-01-22 14:20:56 -0800: Checking catalog hierarchy.
2010-01-22 14:20:58 -0800: Checking extended attributes file.
2010-01-22 14:21:00 -0800: Checking volume bitmap.
2010-01-22 14:21:01 -0800: Checking volume information.
2010-01-22 14:21:01 -0800: The volume Iris appears to be OK.
2010-01-22 14:21:01 -0800: Volume repair complete.
2010-01-22 14:21:01 -0800: Updating boot support partitions for the volume as required.
2010-01-22 14:21:01 -0800: Repair tool completed:
2010-01-22 14:21:01 -0800:
2010-01-22 14:21:01 -0800:
System Profiler shows the drive (on both FW & USB ports when I tried other cords). This drive does not require power and I am not using a USB hub, strictly the laptops ports. And yes, the laptop's power adapter is plugged in.
System Profiler: Device Tree log:
Iomega eGo HDD:
Capacity: 500.11 GB (500,107,862,016 bytes)
Removable Media: Yes
Detachable Drive: Yes
BSD Name: disk1
Product ID: 0x047c
Vendor ID: 0x059b (Iomega Corporation)
Version: 0.01
Serial Number: 000000066273
Speed: Up to 480 Mb/sec
Manufacturer: Iomega
Location ID: 0xfd300000
Current Available (mA): 500
Current Required (mA): 0
Partition Map Type: APM (Apple Partition Map)
S.M.A.R.T. status: Not Supported
Volumes:
Iris:
Capacity: 499.97 GB (499,972,702,208 bytes)
Writable: Yes
File System: Journaled HFS+
BSD Name: disk1s10
When I tried to run Migration Assistant, I just get the spinning search circle and none of the drives come up, just endless searching.
The fact that I got the "Improperly removed device" error when I plugged in the iPhone makes me think something weird is up and it's not actually the external drive. There is clicking/whining/noise, the drives powers up fine and is recognized by the system but the mount point is now "not mounted".
Does anyone have any idea how to fix? If you live in SF, I will buy you a beer.
J

I meant to say; "There are NO clicking/whining/noise sounds made by the external hard drive"

Daisy-Chained External Drive No Longer Mounting

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