| Vall | Hello everyone | 15:34 |
|---|---|---|
| * Vall tips his hat at c0rnelius | 15:34 | |
| Vall | Finally received my Sandisk SD Card MAX Endurance 128GB yesterday, and finished putting it through its paces | 15:35 |
| Vall | Not too bad, ~95MB/s sequential read (vs 100MB/s as spec'ed by the manufacturer) and ~57MB/s write speed (vs 40MB/s spec'ed) | 15:36 |
| Vall | Of course, its best feature (endurance: 60k hours of "continuous video recording", whatever that means) I will only be able to test over time | 15:39 |
| Vall | It would mean almost 7 years of continuous 24/7 use, almost too good to be true | 15:40 |
| Vall | As the warranty is supposedly 10 years (of course contingent on Sandisk itself enduring this long), I guess I'm going to find out, one way or the other ;-) | 15:42 |
| Vall | So, I'm now going ahead and putting Devuan Chimaera for my RPi4 on it | 15:48 |
| Vall | c0rnelius: is devuan_chimaera_4.0.0_amd64_desktop-live.iso still the latest/greatest/'recommmendest'? | 15:50 |
| Vall | er | 15:50 |
| c0rnelius | Amd64? | 15:52 |
| Vall | I mean, rpi-4-devuan-chimaera-5.10.76-v8-ext4-2021-10-30.img.xz | 15:52 |
| Vall | (sorry for the wrong image, copy/pasted from the wrong shell session) | 15:53 |
| c0rnelius | Is that from the devuan server or my GitHub? | 15:53 |
| Vall | c0rnelius: got it from here: https://github.com/pyavitz/binary/releases/tag/images | 15:53 |
| Vall | so, your github | 15:53 |
| c0rnelius | Yeah. | 15:54 |
| Vall | OK | 15:54 |
| c0rnelius | After installing update the kernel using the fetch script. | 15:55 |
| Vall | What's the difference between this one and rpi-devuan-chimaera-5.10.76-ext4-2021-10-30.img.xz? (I notice the latter is missing the '-v8' but I do not know what it means) | 15:55 |
| Vall | (thanks for the tip re: updating the kernel) | 15:56 |
| c0rnelius | That particular one is for raspberry pi zeros or v6 in general. | 15:57 |
| c0rnelius | If there is v7 in the line it's armhf | 15:57 |
| Vall | Ah OK | 15:57 |
| Vall | Of course | 15:58 |
| Vall | Just noticed the other difference, "rpi-4"at the beginning of the filename for the former, vs just "rpi-" for the latter | 15:59 |
| Vall | OK, now everything makes sense ;-) | 15:59 |
| c0rnelius | yeap | 15:59 |
| c0rnelius | I'm actually in the process of building new kernels, so should be available in like 3 hours. | 16:00 |
| Vall | Yay! Gonna wait, then. Nothing like the latest and 'bestest' ;-) | 16:01 |
| Vall | One question, how well is LUKS working on the RPi4 with Devuan Chimaera? I did some research and seems RaspberryFoundation choose to leave out hw support for encryption, but I've seen some comments to the effect that the even without crypto hw the RPi4 CPU would be able to saturate 1GB/s using just 2 cores | 16:03 |
| c0rnelius | 5.15 is gonna become the new LTS, but I'm not sure its really all that stable yet, so I would probs stick with 5.10.y for a while. But both will be available. | 16:03 |
| Vall | OK | 16:03 |
| Vall | (the old story about no one being able to easily distinguish what is a good kernel anymore) | 16:04 |
| c0rnelius | I'm really not sure about LUKS | 16:05 |
| Vall | OK, I will do my own testing re: LUKS. | 16:05 |
| Vall | My idea is to split the ext4 partition and use the main one for root, and the other for an encrypted /usr2 | 16:05 |
| c0rnelius | Maybe someone over at #raspberrypi would know? I see them talking about encryption from time to time. | 16:07 |
| Vall | Thanks for the tip, I will ask there. Will probably test it anyway, both LUKS and with ZFS native encryption (if I can manage to compile and install ZFS, that is). | 16:08 |
| c0rnelius | I saw peps talking about ZFS in #armbian yesterday. I don't know nothing about it though :) | 16:09 |
| Vall | Will check your github again in 3h for the new images, keeping in mind your warning re: 5.15 | 16:10 |
| c0rnelius | You won't need a new img. The kernel can just be installed using that img by running `fetch -u` | 16:10 |
| c0rnelius | Which will list options. | 16:11 |
| Vall | Ah, OK. So install the new image now, and wait 3h then run `fetch -u` | 16:12 |
| Vall | I have a lot of experience with ZFS, but not on RPis... only on x86/SPARC hardware | 16:12 |
| c0rnelius | pretty much. I haven't made any changes to the images so a new one isn't gonna change much. ;) | 16:13 |
| Vall | c0rnelius: talking crypto in #raspberrypi proved most illuminating, thanks for point me that way | 17:19 |
| c0rnelius | np | 17:20 |
| Vall | One person there pointed me towards Adiantum, which could be the answer re: fast crypto on RPi4: https://lwn.net/Articles/776721/ | 17:20 |
| Vall | Seems it's available from kernel 5.0 up: https://www.howtogeek.com/406737/linux-5.0-shy-crocodile-arrives-with-googles-adiantum-encryption/ | 17:20 |
| Vall | It requires CONFIG_CRYPTO_ADIANTUM at kernel config time: https://www.kernelconfig.io/config_crypto_adiantum | 17:21 |
| Vall | is this the case with the kernels you've been building? | 17:21 |
| Vall | c0rnelius: nvm, just found out it's configured as a module. | 17:44 |
| Vall | The weird thing is, loading the module does not change anything in /proc/crypto: https://transfer.sh/M3FqfK/adiantum.out.txt | 17:45 |
| Vall | Any clues appreciated | 17:45 |
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