[clug] raid question

steve jenkin sjenkin at canb.auug.org.au
Wed Feb 19 22:33:23 MST 2014

Disks are cheap and you've got a spare sitting on the shelf for when a disk in your array breaks, don't you?

Pop the suspect drive and replace it, then let the system rebuild under the mounted filesystem. If you're not using hot-plug, this is a power-down...
You're running RAID-6 exactly because it will cope with _two_ failed drives.

During the rebuild you can sustain another failed drive. You're not putting your data at increased risk.

You can then mount the suspect drive somewhere else and stress test it...

If it's not 12 months old, it's covered by a statutory warranty & the drive vendor is obliged to replace it for you.

On 20/02/2014, at 1:08 PM, Eyal Lebedinsky wrote:

> In short: smartctl lists one pending sector. A dd provokes an i/o error as expected.
> An mdadm 'check' does not find a problem and does not trigger an i/o error. Why?

Steve Jenkin, IT Systems and Design 
0412 786 915 (+61 412 786 915)
PO Box 48, Kippax ACT 2615, AUSTRALIA

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