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server down?

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Thanks Zuni for all your hard work and patience in keeping these forums humming along.

Here's a :beer: for you 🙂
 
We had about a 2 hour outage, lost a drive in the raid on a db server. 20 minutes before my birthday lunch YAY, anyway it's up now.

Cheers.
 
If I remember correctly, you use raid 0+1 off of IDE raid controllers, right?

So the downtime was to replace the drive and rebuild the array? But, you didn't lose any data.

If you were using SCSI with hot-swap, you could have replaced the drive with no downtime?

Still trying to figure out all this raid stuff 😉
 
Forum db is raid 10 we're down to raid 1 now until the drive is replaced which will be very soon. No we didn't lose data.

L8rz
 
Originally posted by: MercenaryForHire
<Off-Topic> "Pour water on it" </Off-Topic>

Hope you get things sorted out.

- M4H
Click to expand...

Yeah, then the server will catch fire, and you can RMA the parts. (From a thread like a year ago, if anyone remembers that fun fiasco.)


Originally posted by: KK
Zuni for elite!!!

KK

BTW -- real fast what is raid 10. I know what 0,1, and 5 are.
Click to expand...


RTFF - Read the $#@^%$ FAQ😉


RAID 10/1+0
RAID 1+0 is just what it sounds like, striped mirrors.
4 disks are required for a RAID 10 array, as you will first create two mirrors, then stripe these(2+2).
RAID 10 is very expensive, especially as it begins to scale, as you will need to add disks in pairs, but also offers very high performance, both write and read.
In a RAID 10 array with 6 disks, you can lose up to 3 disks in a best case scenario without losing data.

Mirror 1 Mirror 2 Mirror 3 -
Disk1 Disk2 Disk3 - Stripe 1
Disk4 Disk5 Disk6 -

In the above example, disks 1, 2, and 6 could all break, and you would still have an intact array, since none of the mirrors have broken.
It is a bit of luck involved however, as if Disks 1&4 were to break, the array will break, as Mirror 1 would break.
RAID 10 is best used where both performance and redundancy is needed, such as a high performance database.
Click to expand...
 
Thanks jeff, again real fast, is there a such thing a striped w/parity, mirrored array?

KK
 
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