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disk not ejected properly firewire 800 daisy chain HELP

Hi.


I need HELP!!!


I have an Imac 27in with firewire800 and USB2.


I have 3 GDrive HDD (self-powered) plugged in a daisy chain (Firewire800). The first one (1TB) in the computer, and the two others (2X 2TB), mounted in RAID 1 (mirror), plugged in series in the first one.


3 disks ON.


Then at some point, erratically, the message DISK NOT EJECTED PROPERLY... MAY DAMMAGE... appears and the RAID DIsks go offline. If I open Disk Utility I can see that the RAID is FAILED. One time it corrupt one of the disk and I was unable to rebuild the RAID from disk utility. I even thought that one of the disk was the problem and bought a new one! Same problem happened. I had to retrieve my data with DISK WARRIOR.


So new disk, same way to connect them, new cables and the same problem happen.


It seem that at least one time, it happened when one of the disk (maybe the first one on the chain, the one not mounted into RAID) went out of idling or went to idle.


Sometime if i do shut down the Imac and all the disk and reopen all, and the disks data is ok. Sometimes I have to do a rebuild on the RAID 1, one of the disk being corrupted. wich is a very long procedure.


I read a lot of threads about that, didn't found any good answers about the problem.


It is a BIG problem, my raid 1 disks are scratch disks for video editing with valuable data on them!!!


Would a Firewire HUB could be the solution?

Is there a known problem about daisy chain with firewire800?

Does it have something to do with the fact that my second and third disks in the chain are mounted as raid 1?


PLEASE I AM DESEPERATED ABOUT THAT and I spent a lot of money for new disks and DiskWarrior for nothing!!!!


Thanks


Richard

iMac, Mac OS X (10.6.8), 27 in

Posted on Mar 29, 2015 2:37 PM

Reply
6 replies

Mar 29, 2015 3:38 PM in response to mns579

I put new firewire cables. The problem is not there.

And I just EJECTED my Raid 1 array disks properly and the alert message still appears. Disk utility the see my raid disks as offline and RAID 1 problematic (failed).

Shut down my 2 raid 1 disks.

Start them. The doesn't appear on the desktop but disk utility see them online!!!!!


Weird and unpredictable!

Mar 30, 2015 8:20 AM in response to mns579

alll 3 are powered by their own ac adapter.


yesterday, i did change the configuration. I plugged only the raid 1 disks. When i ejected them, the alert went on. I have then to rebuild the disks with diskWarrior. DU says theyr cannot be repaired. One of the time that occured, before using DiskWarrior, i saw DU saying that Invalis sibling link.


once rebuil with Disk Warrior, everything is fine, up to the next time i eject the disk. The last time, many corruption happened. I had to rebuild again.


i Am lost.

Mar 30, 2015 9:18 PM in response to mns579

Mns579 thank you for trying to help...


I did tonite some tests with two disks (no RAID) on a daisy chain. Ejecting one or the other in different order without shutting their power off... And no problem occured. The only time I had this alert about having ejected not properly a disk is when I shutted down the power from the first disk in the chain. Then the message popped up for the second disk still on.


But so far, no problem like the ones I had. So now it seems that there is some kind of problem with the RAID 1 setup.


In fact, when i do eject the RAID, the two disks seems to stop spinning or at least reduce normally their speed BUT they don't park their heads! Like if the processus is not complete.


Still trying to figure out what is the problem! RAID 1 was for me a very nice option to duplicate easily my video scratch disk and my photos backup bank.


Richard

disk not ejected properly firewire 800 daisy chain HELP

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