Re: Do I understand my RAID6 correctly?

Am 12.04.2011 11:23, schrieb Yann Ormanns:

You now have 9 devices in this Array (750GB*8 = 6 TB, 6 TB - (2*750GB) =
4.5 TB). One of them is the failed spare disk. That means, that this
array can "lose" two disks without losing data, as you already wrote.

Yep, fine.

Of course you can re-use /dev/sdk as a spare disk, but before, you
should check, why it failed (SMART data for example).

I already exported the controller-logs and will look through for SMART
info. Unfortunately the controller does not allow the use of
smartmontools, I can only use the specific ICP Storage Manager.

You should also have a look at the used drive models. E.g. if this array
uses 9x model XYZ from manucaturer ABC, perhaps more drives will fail in
the next time.

uuuh

If the array uses mixed models, it should not be THAT urgent - but that
depends on the importance of the data...
I've read several times of people losing their RAID6, because they did
not mix the hard drive models. Then, a manufacturing fault have very bad
consequences.

Scary. Yes, the server uses the same model for all 9 devices.
From your domain I see that you seem to be located in germany, so you
might know the manufacturer of the server: transtec.

I already opened a support ticket there, we still have a valid support
contract. Last time they sent a new drive, we'll see.

Thanks, Stefan