EVA-Locate Vraid members and maximum simultaneous hard didsk failures

[Mohamed Tarique]

Hi folks,

I am having a setup of EVA4K-2C1D with 8 number of 146GB hard disks. Protection was set to 1. All Vdisk has been set to Vraid1.

Appreciate someone shed light on the following;

1. Is there any RSS will be created here ? If "Yes"' how many? If "No", why ?
2. Since all Vdisks are Vraid1, how to locate the mirror set members(Physically or by using CVEVA)?
3. What is the maximum possible number of hard disk failure which can happen without causing data loss ?

Thanks in advance'
Tarique

[Rob Leadbeater]

Hi,

1. Yes. 8 disks = 1 RSS

2. You don't. The XCS firmware takes care of that for you.

3. In theory, you *might* be able to withstand the loss of four disks, but that depends on which disks fail (over which you have no control) and what the occupancy of the disk group is. In reality, a second disk failure could wipe out all your data, so it's important to replace disks as soon as they fail.

Hope this helps,

Regards,

Rob