Moving from Lunix (mdadm) and a RAID-10 array

A

ajoeiam

Greetings

I've been running what most linux enthusiasts call an overly complicated system (grin - - but its belt and suspenders and I works quite well thank you very much!!!).

So in the process of moving from Linux (mdadm) and a RAID-10 array - - - - how do I set up ZFS - - - I'm assuming Z2 (don't think I'm really needed a 3rd level of redundancy like Z3)?

steps:
1. copy everything on the array to another disk.
2. wipe discs (there are 4 in the array)
3. assuming Z2 how do I use all 4 discs - or can I even?

(Is even Z2 the best place for me to be?)

TIA
 
The ZFS raid10 equivalent is probably more performant than raidz2, but only survives 1 disk failure guaranteed and a second one maybe.
 
raidz2 will have the same storage capacity as 2x zpool mirrors but better recoverability and worse performance. Another thing to consider: with mirrors you can replace 2 disks (with larger ones) of one mirror (to gain more disk space). With raidz2 you will have to replace all four disks to increase disk space. There are online tutorials that will show you how to implement either.

Do you plan to put root on this 4 disk zfs filesystem or is that separate?

Make sure you verify your backup during the transition to zfs!
 
bakul said:
raidz2 will have the same storage capacity as 2x zpool mirrors but better recoverability and worse performance. Another thing to consider: with mirrors you can replace 2 disks (with larger ones) of one mirror (to gain more disk space). With raidz2 you will have to replace all four disks to increase disk space.
Click to expand...
You can add extra drives to raidz, you don't have replace them to get extra space.
 
bob2112 said:
You can add extra drives to raidz, you don't have replace them to get extra space.
Click to expand...
If you have more io ports. I don't know how it is now but generally a newer gen disk would use the same power for much more capacity. So replacing disks (before they wear out) is a better choice.
 
bakul said:
If you have more io ports. I don't know how it is now but generally a newer gen disk would use the same power for much more capacity. So replacing disks (before they wear out) is a better choice.
Click to expand...

But more spindles bring more performance. And smaller disks resilver much faster when a disk fails.
 
bakul said:
If you have more io ports. I don't know how it is now but generally a newer gen disk would use the same power for much more capacity. So replacing disks (before they wear out) is a better choice.
Click to expand...
Sorry - - - - I'm much more of the mind to use things until they don't work.
Haven't checked with smartmontools to see the stats but as long as they work - - - letum buck!
 
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