G3orgios
Cadet
- Joined
- Jun 2, 2020
- Messages
- 6
Hello Community,
After quite a few years of operation, my TrueNas system has reached about 90% of space occupancy (...quite over the recommended 80%!) and thus I need to consider HOW to expand (or rebuild?) it. Here are the existing specs:
TrueNAS 13.0
Model: Supermicro SuperStorage 6049P-E1CR36L
CPU: 2 x Intel Xeon silver 4114 @ 2.2GHz
RAM: 8 x 16GB ECC DDR4
Boot: 2 x 128GB Kingston 2.5" (Raid1)
Jails: 2 x 960GB Samsung PM963 NVMe M.2 (Raid1)
Storage: 12 x 12TB HGST 3.5" SAS 4Kn (3vdev x 4disks, Raidz1)
The main point is to expand the capacity. The "easy" way of doing so is to make another vDev of 4 x 12TB SAS 4Kn disks Raidz1 and be done. HOWEVER, I am considering switching to Raidz2 and just two (2) vDevs (all data are replicated in another machine too, if needed to rebuilt). I think of this to have lower disk-failure risk (Raidz2), since the available space is the same:
Also, is vDev expansion (add drives) released or not yet? If so, does it makes sense to switch to "legacy" Raid design with just 2 vDevs, expanding them by an extra drive on each when needed? Are vDevs become "unstable" over an amount of disks? The top priorities are DATA INTEGRITY and CAPACITY. R/W performance is NOT critical.
Thank you.
George
After quite a few years of operation, my TrueNas system has reached about 90% of space occupancy (...quite over the recommended 80%!) and thus I need to consider HOW to expand (or rebuild?) it. Here are the existing specs:
TrueNAS 13.0
Model: Supermicro SuperStorage 6049P-E1CR36L
CPU: 2 x Intel Xeon silver 4114 @ 2.2GHz
RAM: 8 x 16GB ECC DDR4
Boot: 2 x 128GB Kingston 2.5" (Raid1)
Jails: 2 x 960GB Samsung PM963 NVMe M.2 (Raid1)
Storage: 12 x 12TB HGST 3.5" SAS 4Kn (3vdev x 4disks, Raidz1)
The main point is to expand the capacity. The "easy" way of doing so is to make another vDev of 4 x 12TB SAS 4Kn disks Raidz1 and be done. HOWEVER, I am considering switching to Raidz2 and just two (2) vDevs (all data are replicated in another machine too, if needed to rebuilt). I think of this to have lower disk-failure risk (Raidz2), since the available space is the same:
- 4vdevs x 4x12TB disks each, Raidz1 = 4 x 36TB = 144TB
- 2vdevs x 8x12TB disks each, Raidz2 = 2 x 72TB = 144TB (I am aware that this has slower performance than the 4 vDevs but this is not critical)
Also, is vDev expansion (add drives) released or not yet? If so, does it makes sense to switch to "legacy" Raid design with just 2 vDevs, expanding them by an extra drive on each when needed? Are vDevs become "unstable" over an amount of disks? The top priorities are DATA INTEGRITY and CAPACITY. R/W performance is NOT critical.
Thank you.
George