On Mon, Jul 17, 2023 at 01:33:58PM -0700, Linus Sphinx wrote:

Dammit, entered that, updated and plowed right into kernel 6.3 hates old nvidia cards for 4 damn days of hell. Now have both my dual booted, fedora and ubuntu up and running full 4k. Had to downgrade ubuntu to 6.2.9 and fedora has issues in autofs now. Enable it and begins the death spiral. Switched back to straight fstab nfs4 and seems ok, scary. GTX 2060 wants nvidia-470 FYI, always run os--prober FIRST. Oh yeah nouveau still sucks.

Oh right! replies go to sender by default! I know the original nouveau developer. My solution has been to use Intel video, yet I don't do much fancy!

On 7/18/23 07:09, Linus Sphinx wrote:

It's been so smooth and worked so long I'd forgotten how difficult Nvidia could be. Wish I'd waited for 6.4  autofs still puts my machine in a death spiral but NFS doesn't. I blew a drive in my NAS, vintage thecus n5200, 5 3TB Hitachi deathfarts, io error, not a bad sector, even passed a bad sector scan and didn't fail til you tried to add it as a spare. Found one exact model NOS on B&H Photo, had to break all the disk caddy locks, no clue where the keys went, popped it in, scanned/added/rebuilt itself just like it's supposed to, was amazing. Can't remember where I commented it out or what I turned off to disable it while waiting for the disk, has to be something I did.

I never understood what about autofs/automounter is needed or desirable. /etc/fstab -> mount <foo> -> umount <foo>. Simple, works. Did I miss the memo?

The mdraid manpages are a bit confusing about how to add a device as a spare, but here's a cool method to ease the pain, make a fake RAID from fake disks made from plain files. Make your mistakes in the no-pain sandbox.

# Create 5 fake block devices (fake disks), each 10MB    for i in `seq 1 5`;  do truncate --size=10M fakeblockdev$i; done    # Create loopback mountpoints and mount the fake disks    for i in `seq 1 5` ; do  losetup /dev/loop$i fakeblockdev$i; done    # Create a RAID from ther fake disks    mdadm --create --level=10 --raid-devices=4 --spare-devices=1 /dev/md42 /dev/loop{1..5}

# Create fake filesystems on the fake raid    mke2fs -m 0 -L fakeraid -t ext2 /dev/md42

# cat /proc/mdstat

md42 : active raid10 loop5[4](*S*) loop4[3] loop3[2] loop2[1] loop1[0]        16384 blocks super 1.2 512K chunks 2 near-copies [4/4] [UUUU]

Wallah! Once you've got it working in the sandbox, the same commands should work on the real thing.