External hard drive(s) causing Kernel Panic since RAID setup.

[Eric Hansen]

I’ve never used that particular dock, but I have had issues when trying to run multiple drives over a single USB3 connection. A client gave me an 8 drive enclosure where each drive was its own volume. So 8 drives would appear on my desktop when connected. But it was unreliable. Not sure if it was individual drives spinning down, something with USB3 or something with the controller in the enclosure. But it was most reliable if i pulled each drive out of the enclosure (just an inch so they could still sit in there, but not be connected) and just access one drive at a time. This was on a 15″ rMBP

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Eric Hansen
Production Workflow Designer / Consultant / Colorist / DIT
https://www.erichansen.tv

[Alex Gerulaitis]

Eric has a good point, accessing drives one by one. Tried putting just one drive in?

Any way to try the drives in a different system?

[Luke Ogden]

Tried accessing the drives using the dock connected to my rMBP, Which also caused a kernel panic as does accessing the drives one at a time. It’s surprising because the drives where reliable and docked simultaneously for 3+ days whilst formatting but now I cant get them to stay mounted for two minutes without the panic.

27″ iMac 3.4 GHz Intel Core i7, 16GB 1333 MHz DDR3, OS X 10.7.5 //

[Bob Zelin]

you should not have done a low level format (zeroing out the data).
That’s all nonsense.

You can get a free replacement on the drives from any manufacturer (you are in warrantee) and do it again, but don’t do a low level format. This ain’t brain surgery.

Bob Zelin

Bob Zelin
Rescue 1, Inc.
maxavid@cfl.rr.com

[Kylee Pena]

Bob, if I may ask a half-related question, is zero out data always nonsense or just in this case? Just curious.

blog: kyleesportfolio.com/blog
twitter: @kyl33t
demo: kyleewall.com

[Bob Zelin]

to my knowledge, there is absolutely no reason to zero out data, or do a low level format on a disk drive (SATA, SAS, SCSI, SSD), unless you are trying to get rid of kiddie porn evidence on your drive. A simple quick format on a WinPC or re-partition or erase on a Mac is all that you need to do. I have not looked at spec sheets from WD, HGST and Seagate for some time now, but I recall some type of statement to not do a low level format on the drives from (at least one) of these manufacturers. So yes, it’s always nonsense. The same nonsense when people say “never turn off your RAID array”.

Bob Zelin

Bob Zelin
Rescue 1, Inc.
maxavid@cfl.rr.com

[Bob Zelin]

https://discussions.apple.com/thread/5105956?start=0&tstart=0

good recent thread on this subject.

Bob Zelin

Bob Zelin
Rescue 1, Inc.
maxavid@cfl.rr.com

[Eric Hansen]

I read somewhere (and of course I don’t remember where), that drive manufacturers are no longer taking the time to scan and map out bad blocks before shipping. This somewhat explains the linked recommendations from Seagate in that Apple Discussions Thread.

I try to use something like DiglloydTools “Fill Volume” on new drives before I send them out into the field. But of course, I never seem to get the time 🙂

e

Eric Hansen
Production Workflow Designer / Consultant / Colorist / DIT
https://www.erichansen.tv

[Ericbowen]

Can you access the drives in Disk utility long enough to format them HFS+ Non Journaled? Do you have a Windows system available that you can run a clean command on if not?

Eric-ADK
Tech Manager

[Luke Ogden]

Interesting, there seems to be quite a few of conflicting ideas and the subject; some new and old school thought.

Ok I’ll try get the drives mounted on a window system long enough to re-format the drives, although I’m a bit freaked out now so may just send them back.

27″ iMac 3.4 GHz Intel Core i7, 16GB 1333 MHz DDR3, OS X 10.7.5 //