Greetings!
I am totally new to Truenas and will setup the system tomorrow.
I am using a fourbay device and wonder which is the best way to mix my harddrives.
I have one 22TB drive and four 4Tb drives.
After the summer I plan to buy two more 22Tb drives.
How shall I setup my system?
Personally RAIDZ-2 (but for mix drive - you only get the smallest drive - so only 4TB till all the drives are 22TB)
zraid1 for future 22TB is not really safe.
I suppose two 22TB in a mirror as one pool and the 4 TB drives in either a RAIDZ1 or two mirrored VDEVs as a secondary pool could work.
Not sure what to do with the third 22TB.
As been mentioned, with drives as big 22TB, a RAIDZ1 is not recommended. You have a backup plan I hope?
In the end it depends on what you plan to use the system for.
Totally agree
IMHO can have sense just buy one disk to mirror the 22tb now-soon, and later buy another 2 to add another vdev into the pool… or bit the bullet and buy 3 for a raidz2.
With the other 4, depending on how much space you need/reliability you need, raidz1 to maximize space or raidz2 for be safer.
If you can use all the disk, maybe a mirror pool of 2 disks each vdev can be and option (but until you don’t get another 22tb, you can’t use the one you have).
“zraid1 for future 22TB is not really safe.”
Is it particularly unsafe because of its large size?
“With the other 4, depending on how much space you need/reliability you need, raidz1 to maximize space or raidz2 for be safer.”
If I choose RAIDZ1 and buy two more drives in the autumn, can I switch to RAIDZ2 when I buy a fourth drive?
Correct - it take some what more time to resilver 22TB… another drive could fail during resilver and there goes the pool.
resilver = is rebuild the raid when drive goes bad.
** resilver also upsize the drives in current RAID.
No - you can’t switch to RAIDZ2 from RAIDZ1 easily. That why planning is involved with layout.
You can switch from RAIDZ2 by having RAIDZ1 and RAIDZ2 online and copy data from RAIDZ1 to RAIDZ2. -
I’m currently setting up my TrueNAS for the first time and came across dRAID1. It’s described as a feature that speeds up resilvering on large drives. Could this be a good option for me, considering I’m using 22TB drives, instead of RAIDZ2?
No. draid intended for ALOT of drives… like 90+ drives.
“Due to concerns with storage efficiency, dRAID vdev layouts are only recommended in very specific situations where the TrueNAS storage array has numerous (>100) attached disks that are expected to fail frequently and the array is storing large data block”
