XigmaNAS

Hello,

First, is 4 x 4TB in raidz1 is risky or should i use raidz2 or use 2 vdev of 2 x 4TB (mirror) ?

All new 4TB will be in a new pool.

I already have 2 vdev of 4 x 3TB in a pool. Some drive will die soon, so i want to transfer the important data in the meantime and restore all data from backup later.

Second, if an URE happen, do i lost only the file related to the sector, or i lost all the drive ?

Thanks

iharobike

on raidz1 (raid5)
http://www.zdnet.com/article/why-raid-5 ... g-in-2009/

raidz2 is better than 2 mirrors

in case of ure in zfs you loose only the files affected if the ure is not in something important like the file table.

do you have ecc memory?