On Sat, Jan 18, 2020 at 02:14:46PM +1100, Andrew McGlashan wrote:
Just some thoughts....
Way back, SSDs were expensive and less reliable than today.
Given the cost of SSDs today, I would consider even RAIDING the SSDs.
If it's physically possible to install a second SSD of the same storage capacity or larger then he absolutely should do so. I vaguely recall suggesting he should get a second SSD for the rootfs ages ago, but my understanding / assumption was that there was only physical space and connectors for one SSD in the machine. The 'btrfs snapshot' + 'btrfs send' suggestion was just a way of regularly backing up a single-drive btrfs filesystem onto his raid-1 btrfs array so that little or nothing was lost in case of another drive failure. It's less than ideal, but a LOT better than nothing. I personally would never use anything less than RAID-1 (or equivalent, such as a mirrored pair on zfs) for any storage. Which means, of course, that I'm used to paying double for my storage capacity - i can't just buy one, I have to buy a pair. Not as a substitute for regular backups, but for convenience when only one drive of a pair has died. Drives die, and the time & inconvenience of dealing with that (and the lost data) cost far more than the price of a second drive for raid-1/mirror. craig -- craig sanders <cas@taz.net.au>