eddie200112
Contributor
- Joined
- Mar 17, 2015
- Messages
- 190
but how do you get to that answer?
but how do you get to that answer?
How does everyone feel about the different brands of memory for super micro boards? Samsung, micron, Hynix, others?.. Crucial? Should I not deviate from the tested models on the supermicro website or have people had success with other sticks?
Thanks. Next question if I have ample RAM theres really no need for an L2ARC right?
Awesome thanks. Also from reading cyberjockeys powerpoint, I noticed it says never to make a zpool qith more than 11 disks. Is there anything wrong with 10 or 11? Is it just a system limit or something that ruins performance or quality as the zdev gets larger?
Also in the storage space calculator is sets aside a specified amount for free space? is this needed for performance or something? can I ignore it?
You really need to keep about 20% of your pool free, so if you need to store 20 TB, you need ~ 24 TB of net capacity in your pool. Using 4 TB disks, that would take six of them (6 x 4 TB = 24 TB). RAIDZ3 uses three disks' worth of parity, which you'd need to add to the six disks you need for data. 6+3=9. This really isn't too complicated--I can't help thinking you're making it much more complicated than it needs to be.but how do you get to that answer?
You really need to keep about 20% of your pool free, so if you need to store 20 TB, you need ~ 24 TB of net capacity in your pool. Using 4 TB disks, that would take six of them (6 x 4 TB = 24 TB). RAIDZ3 uses three disks' worth of parity, which you'd need to add to the six disks you need for data. 6+3=9. This really isn't too complicated--I can't help thinking you're making it much more complicated than it needs to be.
"Kingston" is a dirty word around here these days. Just search for the name on the forums and you'll find out why.Also in your opinions what do you consider a good "brand" name USB flash drive? Kingston? Mushkin? Corsair? PNY?
I am confused about drive purchasing also. Are you planning on using all of the above drives in a single vdev in raidz2 or raidz3 or are you going to create two vdevs? I read above the discussion about the max number of drives in a vdev should be held to about 12, so it would make sense to me that you would be planning on using 11 for 8+3 in raidz3 for 32Tb. I am starting out and have no exact storage requirements, but I am trying to pick a number and size of drives considering price points. 11 x $200 dollar drives is out of my budget at the moment. I am thinking possibly 7 x 1Tb drives in raidz2 for 5Tb. Any advice on type of drives? Does one need to stick with enterprise class drives as well?OK I just ordered 6 WD 4TB Black drives WD4003FZEX drives to add to my 5 WD 4TB Black WD4001FAEX drives. Those should work just fine together right?