How to distribute eva 3000 disks evenly among shelves

[Virgilio Santiago]

We are planning to expand our eva 3000 storage from two enclosures to four. The current enclosures we have are already full (28 146Gb FC disks).

With the two new enclosures, we are planning to buy 300Gb FC disks. The eva best practices says that disks types should be distributed evenly to all shelves. But in our case, since the original two shelves are already full, how do we distribute our old and new disks to these four shelves?

[Luk Vandenbussche]

Hi,

Check the current status of the RSS on your disks.

Stop you EVA.
Add to empty shelfs
Redistrubute your 146 GB disks vertically starting from the left, so such a way that the RSS are distributed over all the shelfs.
Start your EVA
If everything is working fine, then add your 300 GB disks.

Check also that your VCS is compatible with 300 GB disks

[Martin Smoral]

Before doing anything with the EVA shelves and the disks, I would backup all your data and verify the backup is good.

[Steven Clementi]

Also, you will need to look at Command View to find all your RSS groups first, map them out and plan the move.


Definitely do a backup first.


Steven

[Matt Burgess]

The process described by Luk Vandenbussche is correct, but you should distribute your drives evenly from the inside-out, not from left to right.

Something like this:

....xxxxxxx...
....xxxxxxx...
....xxxxxxx...
....xxxxxxx...

Then you can add the new 300GB drives.

Also, you can do this online if you like, but it takes significantly longer, since you must move 1 disk at a time.

[Steven Clementi]

Hey Matt:

I always like to hear why people think the disks should be laid out from the middle outwards.(instead of left to right) Can you explain in more detail? I've heard many different stories and have my own opinions and just want to compare.


Steven