Overload? Frequent kernel panic with new, bigger array

[Anders Wallén]

Greetings, everybody!

Last year, I built a RAIDZ2-array using a Probox 8-bay cabinet (8*2 TB) and a Mac Mini (8 GB Ram). It worked well, but I found that I needed more space, so I tried to scale it up.

So, identical cabinet, but with the newer, bigger 3 TB disks. Should work, right?

Unfortunately not. The Mac gets at least one kernel panic per day. After the automatic reboot, the arrays do not auto-mount; the cabinets themselves have to be powered-cycled, and the Mac then issued a "sudo zpool import -f [array-names]".

Any tips? Suggestions? Ideas?

[BelecMartin]

This has almost always been bad cable, controller, and a drive or two in that order, at least with all the systems/pools I have under my thumbs. 

Jason Belec

Sent from my "It's an iPod, a Phone, and an Internet Device..."

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[Anders Wallén]

Interesting. I will try to examine the parts.

I was sure it was a software problem, since it only happens when the new, bigger pool has been mounted for a few hours.

[Simon Casady]

Did the sector size change ? 

On Tue, Oct 14, 2014 at 1:10 PM, Anders Wallén <anders...@mac.com> wrote:

Interesting. I will try to examine the parts.

I was sure it was a software problem, since it only happens when the new, bigger pool has been mounted for a few hours.

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[Jason Belec]

Nope, betcha it is not software. Come on, daddy needs a new sportscar! 

Went through something similar about a month ago, 2 bad sata cables, 2 bad esata cables and that led to 2 bad drives. An honestly, pretty much every single issue I encounter is due to hardware. This is not the first time something so simple has had me scratching me head raw. Had cables split in half at connection, even power cables, only apparent when everything heats up and stuff sags a bit. PITA. Then I had 2 esata cables I just bought drop scrub speed down to Kb/s rather than 2G/s which really frustrated me until I dug out a couple old ones and zoom back to full speed. I really don't understand how C3PO and R2D2 can run amok with so few issues!

The good news is your data is there! If your using the latest stable ZFS (new stuff) you can really work through issues without as many headaches. Recovered a couple old pools recently, took some work, but I was pleasantly surprised. Yes, I keep such things around for just these kinds of tests. ;)

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Jason Belec

Sent from my iPad

On Oct 14, 2014, at 2:10 PM, Anders Wallén <anders...@mac.com> wrote:

Interesting. I will try to examine the parts.

I was sure it was a software problem, since it only happens when the new, bigger pool has been mounted for a few hours.

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[Jason Belec]

That is also a good question....

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Jason Belec

Sent from my iPad