I have a few ZFS ZPOOLs configured:
NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT
backup 1.81T 1.41M 1.81T - - 0% 0% 1.00x ONLINE -
storage 21.8T 7.47T 14.3T - - 0% 34% 1.00x ONLINE -
tank 87.3T 19.2T 68.1T - - 0% 22% 1.00x ONLINE -
…but when I enter a directory (“cd /tank”) it takes about two seconds or longer. When I perform a directory listing it’s the same result. However, after it “warms up” then everything is instant.
What might be causing this?
I’m using a Norco RPC-4220 enclosure with LSI/Avago 9211-8i cards in IT mode. The drives are WD Ultrastar DC 550s (on one array) and WD Reds (different array) and are connected to the backplane using SATA and then cards are connected using SAS (I think?).
I don’t think the drives themselves are spinning down because they don’t seem to support it?
hdparm -B /dev/disk/by-id/ata-WDC_WD40EFZX-68AWUN0_WD-WX12DB0LN94R
/dev/disk/by-id/ata-WDC_WD40EFZX-68AWUN0_WD-WX12DB0LN94R:
APM_level = not supported
The only thing I can think of is that my server’s RAM is 70% full which might be causing some problems?
