Gentoo Portage emerge TMPDIR extending zram btrfs volumes

You can probably see I was heading this way. This post follows a series, and you should read those posts again if you haven't done so recently. This blog post follows my journey through btrfs to gentoo to portage to tmpfs to zram back to btrfs again to finish a circle.

gentoo second install x86 btrfs debian

Now that my Gentoo Phase 2 has been put on hold for the near future, I have to satisfy this itch to install gentoo on my main laptop. Having it on my primary rig, would allow me to use it more often than pulling out my backup system.

My blind first attempt, at a gentoo install, gave me a lot of confidence in the gentoo community. This second attempt substantially lessens the time/aggro I spent previously installing gentoo.

gentoo install x86 btrfs

this as a quick start guide to the much longer and more comprehensive gentoo handbook. but please understand what i have done, and not blindly copy. you should definitely read the gentoo install handbook a few times before even attempting an install.

multiboot btrfs subvolumes

this idea has been knocking around in my head for a while. i want to document it, while it is still there and to flush it out later..

i usually multiboot, and have several operating systems on the same disk. my currently laptop has about dozen+ partitions. each os is fully contained within a partition, including the bootloader on pbr. mbr is clean.

grub rescue btrfs ubuntu

to play more seriously with yet another distro, i needed to install it. so i had some fun resizing/moving partitions around to clear some freespace for a new partition. during this, the partition numbering changed.

now i can't boot ubuntu's btrfs partition. i didn't understand why, till i discovered that partition numbers are hardcoded into the grub boot record.. even though grub cfg contains only labels or uuids. tsk tsk! yet another reason why i seem to be going off grub2 bloatware.