Uluganda

Okay, I love Linux. But I always surprised that I can love Linux ever more everyday. The possibility is basically endless!

I asked about raid0 last week and got a lot of helpful answers. However, this answer from d3Xter really helped me figures how I actually want to configure my system. I decided to buy 2x500GB HDD and 120GB NVME SSD. It's cheap, very cheap. Like $15 total. If there is anything wrong with them, I lost nothing. But boy did I get surprised. I tested BG3, a game that requires SSD to perform well and I see no difference between my old SSD and my new setup. It loads as fast (well, maybe 10-15s slower, but who cares?), and I do not need to wait for the textures to load, at all. Boot time is amazing. I notice no difference at all between this HDD and my last SSD setup. Which is insane!

But the installation is confusing as hell. I write this pseudo-guide for anyone intersted.

FIRST: DO NOT STORE ANY DATA IN THIS SETUP FOR ANYTHING REMOTE TO IMPORTANT!

I favor performance for the cheapest possible above all else. Unless you want to buy 4 HDD to get raid10, do not store anything other than games and your apps on it. Do not use raid5 in this setup, it sucks.

Second: Get yourself an Arch live USB stick with at least 8GB (4 might works, but smallest one I have is 8GB). I think you can use it on other distro, but Arch is the easiest if you want to install IT on the bcache drive. And make sure you booted into UEFI by typing:

ls /sys/firmware/efi/efivars/

Third: Installing bcache. After you have internet on your live system, remount your live iso so we can use the AUR.

mount -o remount,size=8G /run/archiso/cowspace

Then, install base-devel and git

pacman -S base-devel git --ignore linux

If you have slow internet, you can go to 2nd tty by pressing ctrl + alt + f2 and login as root there to do the next step, otherwise wait for the process to finish. We need to setup a user since makepkg wont run on root. So, type:

useradd -m -G wheel user && passwd user and set your password Then we need the user to able to act as superuser. So, we edit visudo and add this line at the bottom: user ALL=(ALL:ALL)ALL save it and press ctrl + alt + f3, login as user you just set. Clone the bcache-tools AUR repo: git clone https://aur.archlinux.org/bcache-tools.git && cd bcache-tools

If you want you can inspect the PKGBUILD, but we will proceed to make it, type:

makepkg -sri

Once it is done, it will throw error about vmliuz is not found, but the package itself is installed, you just need to tell the kernel to load it. We can achieve that by executing:

sudo modprobe bcache && sudo partprobe

Fouth: Configuring the bcache, btrfs, and raid0 List your drive with lsblk identify your HDD and your SSD. Let's say in this instance, we have /dev/sda and /dev/sdb as our HDD and /dev/nvme0n1 as our SSD. I use cfdisk to partition my drive, but you can use whatever you want. I make one partition for both HDD, sda1 and sdb1, and make 3 partitions for my SSD. DO NOT FORMATI IT YET. /dev/sda1 : 500 GB HDD with 500GB partition /dev/sdb1 : same as before /dev/nvme0n1p1 : 118G SSD partition as the cache /dev/nvme0n1p2 : 1G partition as /boot. Even if you have one kernel, do not make a /boot partition less than 1G. I knew it in hard way. /dev/nvme0n1p3 : 200M partition as /boot/efi. Same as before, better safe than sorry. YOU NEED TO HAVE SEPARATE BOOT AND EFI PARTITION, OTHERWISE YOU WILL HAVE AN UNBOOTABLE SYSTEM!

Okay, now we configure our raid.

make-bcache -B /dev/sda1 /dev/sdb1

This command will make a partition (?) called bcache0 and bcache1 under both /dev/sdb and /dev/sda if you use

lsblk

Now, we make raid out of those two.

mkfs.btrfs -L ARCHACHED -d raid0 /dev/bcache0 /dev/bcache1

Then the cache.

make-bcache -C /dev/nvme0n1p1

We can register the cache for our raid setup by its cset.uuid. To know what is the uuid, we can use this command.

bcache-super-show /dev/nvme0n1p1 |grep cset.uuid

Example of the output is:

cset.uuid fc3aac3b-9663-4067-88af-c5066a6c661b

From that, we can register it by using this command:

echo fc3aac3b-9663-4067-88af-c5066a6c661b > /sys/block/bcache0/bcache/attach

echo fc3aac3b-9663-4067-88af-c5066a6c661b > /sys/block/bcache1/bcache/attach

Done! If you lsblk now, you can see that there is bcache0 and bcache1 under the nvme0n1p1 partition.

Now, we can configure our boot partition.

mkfs.ext4 /dev/nvme0n1p2 (Remember, this is the 1G partition)

mkfs.vfat -F 32 /dev/nvme0n1p3 (Remember, this is the 200M partition)

We can then mount all of those drive to install Arch.

mount /dev/bcache0 /mnt

btrfs subvolume create /mnt/root

btrfs subvolume create /mnt/var (optional)

btrfs subvolume create /mnt/home (optional)

umount /mnt

mount /dev/bcache0 -o subvol=root,compress=lzo /mnt/

mount --mkdir /dev/bcache0 -o subvol=home,compress=lzo /mnt/home

mount --mkdir /dev/bcache0 -o subvol=var,compress=lzo /mnt/var

mount --mkdir /dev/nvme0n1p2 /mnt/boot

mount --mkdir /dev/nvme0n1p3 /mnt/boot/efi

Fifth: Install Arch Follow arch wiki, lol.

Last: bcache-tools, mkinitcpio, and grub. Go back to tty3, the user one. And copy the bcache-tools package to your newly installed /mnt

sudo cp bcache-tools-1.1-1-x86_64.pkg.tar.zst /mnt

Then go back tty1 and install it on you arch-chroot.

pacman -U bcache-tools-1.1-1-x86_64.pkg.tar.zst

Now, we configure the mkinitcpio. Edit your mkinitcpio by using you editor of choice. And add bcache in in MODULES so it looks like this:

MODULES=(bcache)

And in HOOKS, add it after block and before filesystem. Example:

HOOKS=(base udev block bcache flesystem)

Make your initcpio by executing this command:

mkinitcpio -p linux

Grub is the last. Install it as usual. Just make sure you did the partition right, as mentioned before.

That's it. You just install Arch Linux on a bcache system. It's complicated, and headache inducing for sure, but I assure you it is totally worth that pain.

Note: If you have problem after you reboot, and want to arch-chroot, you need to install bcache-tools again. If you want to reformat anything and it shows the device as busy after you did the partprobe, you need to tell the kernel to stop any activity to the drive. In this example the sda is the one you want to edit.

echo 1 > /sys/block/sda/sda1/bcache/stop

Now, if you accidentally execute the command, you can use partprobe again to show it up.

Reference: https://wiki.archlinux.org/title/bcache https://wiki.archlinux.org/title/btrfs https://gist.github.com/HardenedArray/4c1492f537d9785e19406eb5cd991735 https://archive.kernel.org/oldwiki/btrfs.wiki.kernel.org/index.php/Using_Btrfs_with_Multiple_Devices.html

I have 500gb SSD and need to basically uninstall Elden Ring and Dark Souls 3 to install Baldur's Gate 3. I want to buy new SSD, but my money is a bit tight right now as I'm saving for my degree's tuition fee.

I'm thinking of buying 3x500GB spinning HDD that will cost me around $20. I know it wont be as fast as SSD, but I read/watched about RAID, and saw amazing result. Around 400-500MBPs, which should be more than enough for gaming, imo. If I were to buy the same amount of storage but SSD, it will cost me $100.

I dont really need redundancy, as all of my personal documents are backed up in my server and I have separate disk just for my data archieve. It will only be used to game and game only.

Do you think that my idea makes sense? Is it does..., I want to ask another questions.

I knew I wanted to use RAID 0, but after I read arch wiki, it says that RAID 5 is superior. Should I use BTRFS, EXT4, ZFS, or F2FS? What kernel or module should I use?

I'm using OpenClash in my router to make shit version of Tor network. I'm using 4 different VPSs to access the internet. It is wonderfull to be able to tell which connection go through what site, or using all of those VPSs to access the internet simultaneously using load-balance method.

I love it.

However, I have a problem. Since it is rule based, I dont know what IPs or ports do torrent connections use. It sometime used Direct (from my ISP) connection which scared me.

I know it's very specific, lol. But my Samsung S8 is basically just a portabel 4G modem for me now. Since the screen is cracked and I don't want to spend money on that old phone. I usually access the phone to scrcpy, it works but since the screen is unuseable, I can no longer give adb access to another devices.

So I just want to know whether is it posible to give it some short of webui that I can access to do basic stuff like turning hotspot on or off, etc.

Other than your carrier give it for free or cheap, I don't really see the reason why should you buy new phone. I've been using Redmi Note 9 for past 3 years and recently got my had on Poco F5. I don't see the point of my 'upgrade'. I sold it and come back to my Note 9. Gaming? Most of them are p2w or microtransaction garbage or just gimped version of its PC/Console counterpart. I mean, $400 still get you PS4, TV and Switch if you don't mind buying used. At least here where I live. Storage? Dude, newer phone wont even let you have SD Card. Features? Well, all I see is newer phones take more features than it adds. Headphone jack, more ads, and repairability are to name a few. Battery? Just replace them. However, my Note 9 still get through day with one 80% charge in the dawn. Which takes 1 hour.

I am genuinely curious why newer phone always selling like hot cakes. Since there's virtually no difference between 4gb of RAM and 12gb of RAM, or 12mp camera and 100mp camera on phone.