norbs
Explorer
- Joined
- Mar 26, 2013
- Messages
- 91
First off I use Truenas as a way to present an iSCSI datastore to ESXi.
Because of this I was told it's best to set my pool to always sync. Obviously this can cause some performance issues.
So in the past I've used a LOG device (1x intel 3700? ssd) and a UPS, it was specifically made to only show up as 10GB out of 100GB.
This seemed to work fine but I never really had a disaster even to know if I'd lose data.
Recently I migrated all my data to a larger pool and now I wanted to add the LOG device to that pool. I was greeted with a warning that I was only adding on device and it could result in dataloss.
So my question here is... what even would need to happen for me to lose data in this config? Would I need to lose my LOG device and have the powercut out on the Truenas box at the same time? Or would just having my LOG device die cause data loss on it's own?
Because of this I was told it's best to set my pool to always sync. Obviously this can cause some performance issues.
So in the past I've used a LOG device (1x intel 3700? ssd) and a UPS, it was specifically made to only show up as 10GB out of 100GB.
This seemed to work fine but I never really had a disaster even to know if I'd lose data.
Recently I migrated all my data to a larger pool and now I wanted to add the LOG device to that pool. I was greeted with a warning that I was only adding on device and it could result in dataloss.
So my question here is... what even would need to happen for me to lose data in this config? Would I need to lose my LOG device and have the powercut out on the Truenas box at the same time? Or would just having my LOG device die cause data loss on it's own?