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hacking·HackingbySK4nda1

TV hardware hacking

Hey all,

I am looking into hacking TVs. Its well known they run linux most of the time, so we should be able to do some fun stuff with them.

I've found some guides, clips and other reference material online, but it isn't much. Do any of you guys have some reference material to help me on my learning journey?

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sysadmin·SysadminbySK4nda1

btrfs raid1 with two disks behaviour.

Hey all,

I want to start using btrfs on my san/nas and use that as a backend for my nextCloud. Before I had read up on btrfs I was thinking about using RAID1. I thought RAID1 would fulfill my two requirements:

  • It would allow me to just pull out a disk and put in a usb dock and read its contents. (disaster recovery, or for my SO to just power down the server and get her data off if something happens to me).
  • It would simply Mirror the data so a single drive can fail and everything is fine.

Now I read things on the documentation of btrfs and in some other places that the RAID1 implementation of btrfs is non-standard, in that is also has some striping functionality.

The image included is from the btrfs docs and it seems it also stripes, not just mirrors, when using 4 disks.

Now my question is: What is its behaviour when using 2 disks? Will this fullfill my two requirements? If not do you have any other recommendations? (I mean i could use zfs...)

A penny for your thoughs :-).

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sysadmin·SysadminbySK4nda1

btrfs partition recognized as swap

Hey all,

Edit: changed confusing wording based on dack's comment.

I have a problem. I'm building a SAN and I'm playing around with btrfs to learn more about how to use it.

I run into the problem where my sdd1 partition is recognized as swap filesystem. I don't understand whats going on here. I formatted all these drives through my usb-dock via my desktop. All the others are fine, so why is this one giving me problems? I tried removing it with parted amd recreating it as btrfs or ext4 doesnt seem to help.

Does anyone have any insight of why this is happening?

root@server :~# lsblk --fs
....
sdc                                                                                                           
└─sdc1                       ext4        1.0            e3e8849d-a25e-4235-8ebf-ca84a7637f64                  
sdd                                                                                                           
└─sdd1                       swap        1              445ae89e-05ef-4fd0-98e3-b592fb2a8a9c                  
sde                                                                                                           
└─sde1                       btrfs                      bc864736-2bf6-4379-aa57-46f1c0f3a95d 
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sysadmin·SysadminbySK4nda1

how to deal with the planned vs adhoc work.

Hey all.

I need some advice on how to deal with the adhoc vs planned work. There are emails, tickets and verbal interruptions that need my attention. Additionally there is an incrr sing amount of meetings I need to attend. At the same time I want to focus on the development of the infrastructure for the planned work. I notice that all the interruptions are detrimental to both the planned and the adhoc work.

The fact that I have to switch my attention all the time and can't just focus starts to frustrate me. It also has to do with my adhd. I cant utilize my hyperfocus to finish the planned work, instead it stimulates the attention switching side of my adhd and cant get into the problem. I just notice I am not as effective as I was before I got this workload.

Do you people recognize this struggle? How do you deal with this?

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Backplane disks not found.

Edit: new cable fixed it. The otherone wasnt crossover.

I have a problem.

I have an (Intertech 2U 2412)[https://www.inter-tech.de/productdetails-144/2U-2412_EN.html]. I have some old desktop hardware in it to build a SAN. The OS I'm running is currently Proxmox 7.

Now I have the problem i'm having is that the drives I put in the hotswap bay are not showing up in the OS. The lights on the bays light up, I can hear the disks spinning so they seem to have power.

The connection splits from SAS to 4 times SATA to a PCIE expansion card. This card is confirmed to work: If I put my bootdrive in it, the pc boots normally and the bootdrive shows up in the OS. The splitter cable could be the problem, granted, but the manual of the case specified this type of cable and I triple checked that this is correct.

When I look in /var/log I see kern.log files with loads of these messages in them. This is where things get murky for me. In my linux journey I haven't yet been this deep into the OS/kernel before. Can anyone help me debug what is happening in my system? Or at least help me understand what is happening in these logs?

[1378464.033553] ata14.00: status: { DRDY }
[1378464.033555] ata14.00: failed command: WRITE FPDMA QUEUED
[1378464.033556] ata14.00: cmd 61/08:a8:b0:ed:a0/00:00:0e:00:00/40 tag 21 ncq dma 4096 out
[1378464.033556]          res 40/00:01:06:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)

EDIT: New cable fixed it! Turns out the other one wasnt crossover.

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selfhost·Self Hosted - Self-hosting your services.bySK4nda1

catchall phonenumber

I have a domain and I use a hosted email I use a catchall email address to create an address on the fly for webshops and such. If they get conprimised or spam me I can block that email.

Is there awauy to have something like this for the new Identifier on the web: the phone number

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