wow this actually works – adding an ssd as a zfs cache means regularly used files are fetched from the SSD once read once (a bit like the ram cache but persists between reboots). My 2 x 8TB mirror VDEV shows up with the cache drive alongside.
zpool stats show the ssd is almost full of cached blocks:
In a Linux dev PC I have four old hard disks I only use sometimes (zfs raidz1) so I bought this wierd gadget:
before powering up you can turn disks on/off! power is just one previously used sata input. Probably useful for other sata-powered things too..
Out Truenas server needs storage boosts occasionally.
This time I ebayed a couple of intel 2TB server ssds and added them to the pool.
Easy! except for the extra 2 sata ports I hoped to add on the Expansion Card (Key A+E PCI Express to SATA Dual Port JMB582) wasn’t recognised by truenas so I used two spare ports on the pcie adapter I had already installed (so not all ports are used it will become a case of swap-out disks to upgrade). A feature of truenas is that the new disks are now empty and get files/blocks eventually – its a space boost not really a speed boost.
JC is finalising nip4 – the successor to his incredible image processing spreadsheet. Not only is it useful for viewing massive multispectral or colorimetric images – but also for saving experiments or prototyping.
Completing 50 north American resorts
Donna Nook 2024 (about 1500 seal pups)
Photography museum and Swedish cake
I’ve gone for a full set for the i4.. which means I can clean and coat the BMW ones 😃
