I have a tower case with a intel 64bit 16GB RAM, but my question is the hardware disk layout
I have two 120GB intel SSD drives and 6 x 3TB Seagate 7200RPM disks.
I want to have the optimum layout for a general NAS server that I can do NFS reads and writes to. Backups, and media storage.
The 3TB drive I was going to ZFS RaidZ2 and mirror the 120GB SSD as logs to improve the writes. The cache I was hoping that the 16GB of RAM would pick up that load.
I was playing with the idea of mirroring the SSDs but doing a split format 1/2 for logs and 1/2 for cache. The thought was that the SSDs could take the load and the mirror would mitigate a SSD drive failure.
I would have loved to have ZFS configured to use a true tier storage where it would auto-move blocks between SSD, and faster and slower HDs (I have old disks) The tower can hold 10 HDs and 4 SSDs
[root@freenas /]# uname -a
FreeBSD freenas.local 8.3-RELEASE-p7 FreeBSD 8.3-RELEASE-p7 #1 r249203M: Sat Apr 6 09:28:27 PDT 2013 firstname.lastname@example.org:/tank/home/jpaetzel/fn8.3/freenas/os-base/amd64/tank/home/jpaetzel/fn8.3/freenas/FreeBSD/src/sys/FREENAS.amd64 amd64
[root@freenas /]# dmesg | grep mem
real memory = 17179869184 (16384 MB)
avail memory = 16425308160 (15664 MB)
[root@freenas /]# zpool status
scan: none requested
NAME STATE READ WRITE CKSUM
ZFS-Raid-Z2 ONLINE 0 0 0
raidz2-0 ONLINE 0 0 0
gptid/5643058c-1198-11e3-9e5a-d43d7e35d587 ONLINE 0 0 0
gptid/5699113f-1198-11e3-9e5a-d43d7e35d587 ONLINE 0 0 0
gptid/571ddcf8-1198-11e3-9e5a-d43d7e35d587 ONLINE 0 0 0
gptid/57aadd13-1198-11e3-9e5a-d43d7e35d587 ONLINE 0 0 0
mirror-1 ONLINE 0 0 0
gptid/57e90a29-1198-11e3-9e5a-d43d7e35d587 ONLINE 0 0 0
gptid/57fc1f5e-1198-11e3-9e5a-d43d7e35d587 ONLINE 0 0 0
errors: No known data errors