| 1 |
>>> If it's Type 2, then four drives with a spare is equally tolerant. |
| 2 |
>>> Slightly better, even, if you take into account the reduced probability |
| 3 |
>>> of 2/5 of the drives failing compared to 2/6. |
| 4 |
>> |
| 5 |
>> Thank you very much for this info. I had no idea. Is there another |
| 6 |
>> label for these RAID types besides "Type 1" and "Type 2"? I can't |
| 7 |
>> find reference to those designations via Google. |
| 8 |
> |
| 9 |
> Nothing standard. RAID 10 pretty intuitively comes from RAID 1+0, which |
| 10 |
> can be read aloud to figure out what it means: "RAID 1, plus RAID 0," |
| 11 |
> i.e. you do RAID 1, then stripe (RAID 0) the result. |
| 12 |
> |
| 13 |
> The trick is that RAID 1 can refer to either mirroring (2-way) or |
| 14 |
> multi-mirroring (3-way) [1]. In the end, the designation is the same: |
| 15 |
> RAID 1. So if you stripe either of them, you wind up with RAID 10. In |
| 16 |
> other words, "RAID 10" doesn't tell you which one you're going to get. |
| 17 |
> |
| 18 |
> If I ever find a controller that will do multi-mirroring + RAID 0, I'll |
| 19 |
> let you know what they call it =) |
| 20 |
|
| 21 |
Is multi-mirroring (3-disk RAID1) support without RAID0 common in |
| 22 |
hardware RAID cards? |
| 23 |
|
| 24 |
- Grant |
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