How to run an XBOX game on CXBX?
I have downloaded and started to run CXBX, but it needs a .xbe file. The game I am attempting to play is Robot Wars Extreme Destruction, which is an XBOX game I downloaded using the megathread, but it is a .iso file instead of an .xbe file.
How do I get it to run on CXBX? Should I be trying to run it on a different emulator?
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#2
There’s an update that fixes some of the graphic glitches coming. 2U at 20s and DOA3 at 9:35
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#3
There’s an update that fixes some of the graphic glitches coming. 2U at 20s and DOA3 at 9:35
Amazing! Just waiting on Xtreme
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#4
Does anyone know where this emulator stores game saves? I was messing around with DOA3++ and it is clearly saving my settings, but I have no idea where. I’d like to import my Xbox save.
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#5
It’s in your AppData/Roaming folder. Once you’re there, navigate to the Cxbx-Reloaded/EmuDisk folder. In that folder is a bunch of partition folders. Your save file will most likely be in Partition1.
Side note, adding costumes to the folder also works, which is pretty neat.
Last edited: Jun 14, 2018
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#6
Yeah, I actually ended up finding it after I posted this. Sadly, it doesn’t look like you can get 2U saves to work though. Even swapping out Cxbx’s EEPROM.bin file with the one from your Xbox doesn’t work.
EDIT: Importing a 3.1 save didn’t work either. Hmm.
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#7
NICE!!! Gonna test it out!
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#8
With the latest version of CXBX, the UI works now (though only in windowed mode atm) Also modding has also got a LOT more easier. You can simply drag costumes over to the emulator’s Partition save folder.
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#9
What emulator do I need to download?
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#10
Whenever I try to open the XBE file it states: «invalid magic number in XBE file» anyone an idea on how to fix this?
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#11
Works on my end, though I wish I have a better computer to run it.
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#12
What emulator do I need to download?
Cxbx-reloaded
Whenever I try to open the XBE file it states: «invalid magic number in XBE file» anyone an idea on how to fix this?
Where did you get the xbe from? I’ve had no issues with any of mine. I ftp’d the discs directly from the system.
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#14
Odd. I’ve never once experienced crashing with 3.1/3++. The only issues I’ve had are the odd graphical ones and that Xbox saves don’t work with it, for some reason.
Also, in regards to DOA2U, I’ve noticed that unlocking Hitomi seems to be impossible. Having a DOA3 save did not seem to matter. Haven’t tried with a DOAX save on there though.
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#15
Odd. I’ve never once experienced crashing with 3.1/3++. The only issues I’ve had are the odd graphical ones and that Xbox saves don’t work with it, for some reason.
Also, in regards to DOA2U, I’ve noticed that unlocking Hitomi seems to be impossible. Having a DOA3 save did not seem to matter. Haven’t tried with a DOAX save on there though.
DOAX save worked for me!!
Last edited: Aug 9, 2020
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#16
Dead or alive 3 on widescreen is gorgeous
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#17
This time Doa3 on Widescreen Runs faster beacuse i used an older build of CXBX
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#18
In the newest build of cxbx some parts of the UI appears
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#19
This time Doa3 on Widescreen Runs faster beacuse i used an older build of CXBX
Which update are you using ? i was able to get my menus to show up ( hud/ui)
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#20
Which update are you using ? i was able to get my menus to show up ( hud/ui)
The one dated august 27th
#1 2021-06-02 18:43:41
- bysom
- Member
- Registered: 2021-06-02
- Posts: 13
[SOLVED] Invalid magic number on boot
Hi,
after a system upgrade including linux and linux-headers my system stopped working.
Loading Linux core repo kernel...
error: invalid magic number.
Loading initial ramdisk...
error: you need to load the kernel firstI’ve already tried to reinstall linux and linux-headers, tried `mkinitcpio -P`, to rebuild my grub config and to reinstall grub. Everything without error messages.
Some weeks ago I had the same issue, but here everything was fine again after I reinstalled linux and linux-headers.
I’ve used the grub command line. I’m not sure if I used it correctly or if it is a hint:
grub> ls (hd1,gpt3)
Partition hd1,gpt3: No known filesystem detected - Partition start at 37315584KiB - Total size 3869702983.5KiBIt is a btrfs filesystem and it works.
I hope someone has an idea.
EDIT: My solution was to upgrade grub to 2.06 RC1. Details are in the thread.
Last edited by bysom (2021-06-07 19:52:23)
#2 2021-06-02 20:06:13
- seth
- Member
- Registered: 2012-09-03
- Posts: 38,513
Re: [SOLVED] Invalid magic number on boot
Suggests /boot/vmlinuz-linux is corrupt.
Is the boot partition full (no space left)?
What dow «file /boot/vmlinuz-linux» say and what is the md5 of the file?
If thereÄs enough space, can you isntall and boot the lts kernel?
#3 2021-06-03 09:26:48
- bysom
- Member
- Registered: 2021-06-02
- Posts: 13
Re: [SOLVED] Invalid magic number on boot
Hi, thanks for your answer.
There is enough space, since i have no extra /boot partition. I’ve encrypted my entire system including /boot. Therefore I have an extra efi partition with grub, that decrypts my btrfs and then boots the kernel. Mostly like it is described in the Wiki
# df -h
...
/dev/mapper/cryptroot 3,7T 2,3T 1,4T 64% /mnt
/dev/mapper/cryptroot 3,7T 2,3T 1,4T 64% /mnt/home
/dev/mapper/cryptroot 3,7T 2,3T 1,4T 64% /mnt/.snapshots
/dev/sda1 599M 352K 599M 1% /mnt/efiI’ve also installed the lts kernel. Both aren’t working.
# file /mnt/boot/vmlinuz-linux
/mnt/boot/vmlinuz-linux: Linux kernel x86 boot executable bzImage, version 5.12.8-arch1-1 (linux@archlinux) #1 SMP PREEMPT Fri, 28 May 2021 15:10:20 +0000, RO-rootFS, swap_dev 0x8, Normal VGA# file /mnt/boot/vmlinuz-linux-lts
/mnt/boot/vmlinuz-linux-lts: Linux kernel x86 boot executable bzImage, version 5.10.41-1-lts (linux-lts@archlinux) #1 SMP Fri, 28 May 2021 15:03:28 +0000, RO-rootFS, swap_dev 0x8, Normal VGAHere the md5 sums
# md5sum /mnt/boot/vmlinuz-linux
04da1eb5b1d97e228936fbb613277406 /mnt/boot/vmlinuz-linux# md5sum /mnt/boot/vmlinuz-linux-lts
f525237336ec905a8af0002ac457d1dc /mnt/boot/vmlinuz-linux-ltsI’ve also tried a `btrfs check` without errors.
Thanks for your help!
#4 2021-06-03 13:42:56
- seth
- Member
- Registered: 2012-09-03
- Posts: 38,513
Re: [SOLVED] Invalid magic number on boot
It would seem that either the decryption fails or maybe is just too slow
Can you «ls» the partition after «insmod btrfs»?
#5 2021-06-03 17:30:34
- bysom
- Member
- Registered: 2021-06-02
- Posts: 13
Re: [SOLVED] Invalid magic number on boot
Okay, I have some results.
After the cryptomount command:
> ls (crypto0)
Device crypto0: Filesystem type btrfs - Label `cepa`, UUID <the uuid> - Sector size 512B - Total size 3869700935.5KiBI have tried a `ls /@/boot` after the `echo ‘Loading Linux linux-lts …’` and it lists the files in my /boot directory. After that I have tried a `file —is-x86-linux /@/boot/vmlinuz-linux` and got no result (and also no error). Is there something else I should try?
#6 2021-06-03 18:37:26
- bysom
- Member
- Registered: 2021-06-02
- Posts: 13
Re: [SOLVED] Invalid magic number on boot
I’ve tried a `sleep 30` before loading the kernel, which hasn’t changed anything.
After that I have chrooted my arch again and reinstalled linux, linux-lts, and the headers and now something changed. If I try to boot the LTS kernel it passes the ‘Loading Linux linux-lts …’ section and then I get a kernel panic in the following ‘Loading initial ramdisk …’ section. The error message before the kernel panic is
Initramfs unpacking failed: invalid magic at start of compressedThe normal linux kernel still fails at the first section ‘Loading Linux linux …’
Last edited by bysom (2021-06-03 18:38:35)
#7 2021-06-04 05:19:17
- seth
- Member
- Registered: 2012-09-03
- Posts: 38,513
Re: [SOLVED] Invalid magic number on boot
Re-cap:
This is a regression, the config used to work befoer?
The files end on the encrypted partition intact, ie. they’re perfectly accessible offline?
The error has a degree of randomness, eg. vmlinuz-linux-lts (now) loads, but the other files have bad header bytes?
What else was included in the breaking udpate? /var/log/pacman.log?
file --is-x86-linux /@/boot/vmlinuz-linuxreturns a boolean.
if file --is-x86-linux /@/boot/vmlinuz-linux; then echo 'kernel is good'; fi#8 2021-06-04 14:48:33
- bysom
- Member
- Registered: 2021-06-02
- Posts: 13
Re: [SOLVED] Invalid magic number on boot
Yes, your recap sounds correct. The config worked before, I can access my files and the error seems to have some kind of randomness.
Here is the pacman log from the last update before the crash: http://ix.io/3oJJ
#9 2021-06-04 14:55:54
- seth
- Member
- Registered: 2012-09-03
- Posts: 38,513
Re: [SOLVED] Invalid magic number on boot
cryptsetup sticks out…
Downgrade that, re-install the kernels and see what happens.
BE PREPARED TO LOSE ACCESS TO THE … oh, wait: you can’t boot and will have to chroot anyway 
#10 2021-06-04 17:48:05
- bysom
- Member
- Registered: 2021-06-02
- Posts: 13
Re: [SOLVED] Invalid magic number on boot
I’ve downgraded to cryptsetup 2.3.4 and the error is still the same.
Is this setup with an encrypted boot partition that rare, that it could be a bug in grub or somewhere else? The idea to reinstall my arch with a classical encryption setup gets more and more attractive for me. Unless you have still some good ideas. I’m still very happy with your help
#11 2021-06-04 20:40:21
- seth
- Member
- Registered: 2012-09-03
- Posts: 38,513
Re: [SOLVED] Invalid magic number on boot
Did the kernel re-installation change anything about the randomness aspect of the kernel/initramfs «corruption»?
And otherwise, how the status is at the grub shell (ie. testing the file types there) in case this is -somehow- a time/race condition…
#12 2021-06-05 20:23:24
- bysom
- Member
- Registered: 2021-06-02
- Posts: 13
Re: [SOLVED] Invalid magic number on boot
Hi, I have some news.
To your questions: The kernel reinstallation made that the error occours at the ‘Loading Linux linux-lts …’ again for the lts kernel which made it to the initramfs loading. As far as I remember this state changed with the reinstallation of the kernel.
I have tried your ‘if file xy then’ example and it obviously returned a false value. I’ve got a ‘kernel is bad’ because I’ve added an else case. It should have been true, right?
After that I saw, that I can use md5sum with grub and checked the md5 sum of the kernel and got a different number than I get from my live system.
From grub
> md5sum /@/boot/vmlinuz-linux
546c...145ce /@/boot/vmlinuz-linux From a live linux
# md5sum /mnt/boot/vmlinuz-linux
8ed348f0125772a6ef0756b818199fc6 /mnt/boot/vmlinuz-linuxI have asked someone else with an arch linux for a hash sum as a reference and got the 8ed348f0125772a6ef0756b818199fc6 for the actual kernel.
(I’ve updated the kernel yesterday)
Then I’ve used cat with grub to view some text files which all looked normal to me. After that I’ve used md5sum on one of these files and got the same hash numbers with grub and with my live stick.
Last edited by bysom (2021-06-05 21:33:05)
#14 2021-06-06 12:13:21
- bysom
- Member
- Registered: 2021-06-02
- Posts: 13
Re: [SOLVED] Invalid magic number on boot
Hi, I have changed that compression to cat and reinstalled the kernels.
The md5 sums from my live linux (ubuntu 20.04, Kernel 5.8.0, cryptsetup 2.2.2, btrfs-progs v5.4.1). Those from my chrooted arch are the same.
f14f10d20670a7638af02f4ae11b8c2e /mnt/boot/initramfs-linux.img
2cda8759540127bf587869679441188b /mnt/boot/initramfs-linux-lts.img
8ed348f0125772a6ef0756b818199fc6 /mnt/boot/vmlinuz-linux
afe5da8d09ed00335cea004e1ed79f65 /mnt/boot/vmlinuz-linux-ltsThe md5sums from grub
f14f10d20670a7638af02f4ae11b8c2e /@/boot/initramfs-linux.img
2cda8759540127bf587869679441188b /@/boot/initramfs-linux-lts.img
e36e627...3a053 /@/boot/vmlinuz-linux
7727430...f441de /@/boot/vmlinuz-linux-ltsThat ones from the initramfs are correct. And that one from the linux is different now.
Last edited by bysom (2021-06-06 12:18:59)
#15 2021-06-06 12:34:36
- seth
- Member
- Registered: 2012-09-03
- Posts: 38,513
Re: [SOLVED] Invalid magic number on boot
Smells as if the grub btrfs module doesn’t like compressed files (at least not zstd)?
If you check a random zstd compressed file from the grub shell, does its md5 deviate?
Or do you maybe use https://wiki.archlinux.org/title/Btrfs#Compression ?
#16 2021-06-06 21:57:33
- bysom
- Member
- Registered: 2021-06-02
- Posts: 13
Re: [SOLVED] Invalid magic number on boot
Yes, I’m using btrfs compression with zstd.
I’ve checked the results with a normal file
Linux point of view
c3b6db02c809b04751fa5c7c0f430df4 /mnt/root/Testfile.mp4
0a02ed72843d8893bd5616cf58dd8737 /mnt/root/Testfile.mp4.zstgrub point of view
41bf8909...cdc8da /@/root/Testfile.mp4
3283ab1ac...281f11e /@/root/Testfile.mp4.zstBoth files are different here. There could be some randomness, I think.
Last edited by bysom (2021-06-06 22:27:06)
#17 2021-06-06 22:03:11
- seth
- Member
- Registered: 2012-09-03
- Posts: 38,513
Re: [SOLVED] Invalid magic number on boot
What if you «chattr -c /boot» and update the kernel?
Edit: also notice the warning and to have grub-install post 2019-07-05
Last edited by seth (2021-06-06 22:06:14)
#18 2021-06-07 19:45:18
- bysom
- Member
- Registered: 2021-06-02
- Posts: 13
Re: [SOLVED] Invalid magic number on boot
Hi, I have tried that chattr -c /boot thing and it hasn’t changed anything. After that I have checked the md5sums with grub again and got for one file an error message containing ‘error: zstd data corrupted.’. After that I have repeated that btrfs check just in case without errors.
Since the error only occurred with grub and there is already a rc1 for the next grub release, which seems to be really rare, I thought that I could try grub-git from the aur (what if it is a grub bug and no one fixes it before the release, was my first thought). So I installed grub-git, then executed grub-install, restored the grub config and got a booting system. I’m a bit happy now. And I am very thankful for your help and your patience, seth! A very positive experience. Let me know if I can do something in reward.
#19 2021-06-07 19:47:19
- seth
- Member
- Registered: 2012-09-03
- Posts: 38,513
Re: [SOLVED] Invalid magic number on boot
Let me know if I can do something in reward.
Please always remember to mark resolved threads by editing your initial posts subject — so others will know that there’s no task left, but maybe a solution to find.
Thanks.
#20 2021-06-07 19:49:57
- bysom
- Member
- Registered: 2021-06-02
- Posts: 13
Re: [SOLVED] Invalid magic number on boot
Of course 
Last edited by bysom (2021-06-07 19:54:38)
Что за ошибка с магическим числом?
Что такое «Неправильное магическое число» ImportError в python, и как мне это исправить?
Единственное, что я могу найти в Интернете, говорит о том, что это вызвано компиляцией файла .py -> .pyc и последующей попыткой использовать его с неправильной версией python. В моем случае, однако, файл, кажется, импортирует нормально в некоторых случаях, но не в других, и я не уверен, почему.
Предоставление питоном информации в трассировке не особенно полезно (вот почему я спрашивал здесь …), но здесь это на случай, если это поможет:
Traceback (most recent call last):
File "run.py", line 7, in <module>
from Normalization import NormalizerОтветы:
Магическое число происходит из систем типа UNIX, где первые несколько байтов файла содержат маркер, указывающий тип файла.
Python помещает аналогичный маркер в свои pycфайлы при создании .
Затем интерпретатор python проверяет правильность этого числа при загрузке.
Все, что повреждает это магическое число, вызовет вашу проблему. Это включает в себя редактирование pycфайла или попытку запуска pycиз другой версии python (обычно позже), чем ваш интерпретатор.
Если это ваши pyc файлы, просто удалите их и дайте интерпретатору пересобрать pyфайлы. В системах типа UNIX это может быть чем-то простым:
rm *.pycили:
find . -name '*.pyc' -deleteЕсли они не ваши, вам придется либо получить pyфайлы для повторной компиляции, либо интерпретатор, который может запускать pycфайлы с этим конкретным магическим значением.
Одна вещь, которая может быть причиной прерывистого характера. Это pycвызывает проблемы могут быть импортированы только при определенных условиях. Крайне маловероятно, что это будет импортировать иногда. Вы должны проверить фактическую трассировку полного стека при сбое импорта?
Как и в сторону, то первое слово из всех моих 2.5.1(r251:54863) pycфайлов 62131, 2.6.1(r261:67517)есть 62161. Список всех магических чисел можно найти Python/import.c, воспроизведенный здесь для полноты (актуальный на момент публикации ответа, он мог измениться с тех пор):
1.5: 20121
1.5.1: 20121
1.5.2: 20121
1.6: 50428
2.0: 50823
2.0.1: 50823
2.1: 60202
2.1.1: 60202
2.1.2: 60202
2.2: 60717
2.3a0: 62011
2.3a0: 62021
2.3a0: 62011
2.4a0: 62041
2.4a3: 62051
2.4b1: 62061
2.5a0: 62071
2.5a0: 62081
2.5a0: 62091
2.5a0: 62092
2.5b3: 62101
2.5b3: 62111
2.5c1: 62121
2.5c2: 62131
2.6a0: 62151
2.6a1: 62161
2.7a0: 62171Удаление всех файлов .pyc исправит ошибку «Bad Magic Number».
find . -name "*.pyc" -deleteЗагрузка файла, сгенерированного python3, *.pycс python2 также вызывает эту ошибку.
Возьмите файл pyc на машину с Windows. Используйте любой Hex-редактор, чтобы открыть этот pyc-файл. Я использовал бесплатное программное обеспечение «HexEdit». Теперь прочитайте шестнадцатеричное значение первых двух байтов. В моем случае это были 03 f3.
Откройте calc и преобразуйте его режим отображения в Programmer (Scientific in XP), чтобы увидеть шестнадцатеричное и десятичное преобразование. Выберите «Hex» из переключателя. Введите значения в качестве второго байта, а затем первого байта, т.е. f303 Теперь нажмите кнопку «Dec» (десятичное число). Отображаемое значение соответствует магическому числу, известному как версия python.
Итак, учитывая таблицу, приведенную в предыдущем ответе
- 1.5 => 20121 => 4E99, поэтому файлы будут иметь первый байт как 99, а второй как 4e
- 1.6 => 50428 => C4FC, поэтому файлы будут иметь первый байт как fc, а второй как c4
Ошибка «Bad magic number» также возникает, если вы вручную назвали свой файл с расширением .pyc
У меня был странный случай ошибки Bad Magic Number при использовании очень старой (1.5.2) реализации. Я сгенерировал файл .pyo, и это вызвало ошибку. Как ни странно, проблема была решена путем изменения названия модуля. Оскорбительное имя было sms.py. Если я сгенерировал sms.pyo из этого модуля, результатом стала ошибка Bad Magic Number. Когда я изменил имя на smst.py, ошибка исчезла. Я проверил туда-сюда, чтобы увидеть, не мешает ли sms.py каким-либо другим модулям с тем же именем, но я не смог найти никакого конфликта имен. Хотя источник этой проблемы для меня остался загадкой, я рекомендую попробовать изменить имя модуля.
Это также может быть связано с отсутствием __init__.pyфайла в каталоге. Скажем, если вы создадите новый каталог в django для разделения модульных тестов на несколько файлов и поместите их в один каталог, то вам также необходимо создать __init__.pyфайл рядом со всеми остальными файлами в новом созданном тестовом каталоге. в противном случае это может дать ошибку как
Traceback (most recent call last):
File "C:UsersUSERNAMEAppDataLocalProgramsPythonPython35Libunittestloader.py",line 153, in loadTestsFromName
module = __import__(module_name)
ImportError: bad magic number in 'APPNAME.tests': b'x03xf3rn'
Это гораздо эффективнее, чем выше.
find {directory-of-.pyc-files} -name "*.pyc" -print0 | xargs -0 rm -rfгде {directory-of-.pyc-files}каталог, содержащий скомпилированные файлы Python.
В моем случае это были не .pycстарые двоичные .moфайлы перевода после того, как я переименовал свой собственный модуль, так что внутри этой папки модуля мне пришлось запустить
find . -name *.po -execdir sh -c 'msgfmt "$0" -o `basename $0 .po`.mo' '{}' ;(пожалуйста, сделайте резервную копию и попробуйте .pycсначала исправить файлы)
Это также может произойти, если у вас неправильный файл python27.dll (в случае Windows), чтобы решить эту проблему, просто переустановите (или распакуйте) python с точной соответствующей версией dll. У меня был похожий опыт.
Я только что столкнулся с той же проблемой с Fedora26, где многие инструменты, такие как dnf, были сломаны из-за неправильного магического числа для шести. По неизвестной причине у меня есть файл /usr/bin/six.pyc с неожиданным магическим числом. Удаление этого файла решит проблему
В моем случае у меня git cloneесть библиотека, в которой есть переводчик
#!/usr/bin/env pythonХотя pythonэто и привело к тому, Python2.7что мой основной код работал с python3.6 … он все же создал *.pycфайл для 2.7версии …
Я могу сказать, что эта ошибка, вероятно, является результатом смешения версий 2.7 и 3+, поэтому очистка (в любом случае вы можете думать о том, что вы используете) — поможет здесь …
- не забудьте настроить этот код Python2x -> Python 3 …
Не удаляйте их !!! До того как……….
Найдите версию в вашей папке git, svn или copy, которая работает.
Удалите их, а затем восстановите все .pyc.
Это работа для меня.
Вам нужно будет выполнить эту команду на каждом пути, который у вас есть в вашей среде.
>>> import sys
>>> sys.path
['', '/usr/lib/python36.zip', '/usr/lib/python3.6', '/usr/lib/python3.6/lib-dynload', '/usr/local/lib/python3.6/dist-packages', '/source_code/src/python', '/usr/lib/python3/dist-packages']
Затем выполните команду в каждом каталоге здесь
find /usr/lib/python3.6/ -name "*.pyc" -delete
find /usr/local/lib/python3.6/dist-packages -name "*.pyc" -delete
# etc...
Asked by: Alexane Kautzer
Score: 4.1/5
(73 votes)
A Bad magic number in superblock error is a clear indication that the operating system is not able to determine file system type of /dev/sdb using superblock data. dumpe2fs will work on mounted or unmounted disk but mke2fs require disk unmounted. /dev/sdb is entire device, not just one partition!
How do I fix bad magic number in superblock?
1 Reply
- Run fsck -b $BACKUPSB /dev/sda to repair your disk using the Superblock backup. As an example, for the output above you’ll want to run fsck -b 32768 /dev/sda which uses the first backup block. …
- Mount the disk with mount -o barrier=0 /dev/sda /media/sda to confirm the disk has been repaired and can now be mounted.
What is magic number in superblock?
A Bad magic number in superblock error is a clear indication that the operating system is not able to determine file system type of /dev/sdb using superblock data. dumpe2fs will work on mounted or unmounted disk but mke2fs require disk unmounted. /dev/sdb is entire device, not just one partition!
How do I fix superblock error?
Restoring a Bad Superblock
- Become superuser.
- Change to a directory outside the damaged file system.
- Unmount the file system. # umount mount-point. …
- Display the superblock values with the newfs -N command. # newfs -N /dev/rdsk/ device-name. …
- Provide an alternative superblock with the fsck command.
What causes bad superblocks?
The only reason why «superblocks» might be seen as «going bad,» is that they’re (of course) the blocks most-frequently written. Therefore, if the drive is going fishy, this is the block that you are most likely to realize has been corrupted …
24 related questions found
How do I know if my superblock is bad?
Bad superblock
- Check which superblock is being used by running: fsck –v /dev/sda1.
- Check which superblocks are available by running: mke2fs -n /dev/sda1.
- Select a new superblock and execute the following command: fsck -b <block_number> /dev/sda1.
- Reboot the server.
How do I restore fsck?
To run fsck in recovery mode:
- Enter the boot menu and choose Advanced Options.
- Select the Recovery mode and then “fsck”.
- When prompted to remount the root file system choose “Yes”.
- Once done, resume the normal boot.
How do I restore XFS filesystem?
Mount the filesystem to replay the log, and unmount it before re-running xfs_check. If you are unable to mount the filesystem, then use the xfs_repair —L option to destroy the log and attempt a repair. Note that destroying the log may cause corruption — please attempt a mount of the filesystem before doing this.
What is super block in Unix?
Each UNIX partition usually contains a special block called the superblock. The superblock contains the basic information about the entire file system. This includes the size of the file system, the list of free and allocated blocks, the name of the partition, and the modification time of the filesystem.
What does superblock signify in Linux?
A superblock is a record of the characteristics of a filesystem, including its size, the block size, the empty and the filled blocks and their respective counts, the size and location of the inode tables, the disk block map and usage information, and the size of the block groups.
What is magic number in file system?
ANSWER: A magic number is a numeric or string constant that indicates the file type. This number is in the first 512 bytes of the file. By default the localized magic file /usr/lib/locale/locale/LC_MESSAGES/magic is used to identify files that have a magic number.
What is Linux dumpe2fs command?
dumpe2fs is a command line tool used to dump ext2/ext3/ext4 filesystem information, mean it displays super block and blocks group information for the filesystem on device. Before running dumpe2fs, make sure to run df -hT command to know the filesystem device names.
What is Linux e2fsck command?
DESCRIPTION top. e2fsck is used to check the ext2/ext3/ext4 family of file systems. For ext3 and ext4 file systems that use a journal, if the system has been shut down uncleanly without any errors, normally, after replaying the committed transactions in the journal, the file system should be marked as clean.
What is the difference between fsck and e2fsck?
fsck is just the original name. When they came out with new file systems they would need a specific tool for each one, efsck for ext, e2fsck for ext2, dosfsck, fsckvfat. So they made fsck the front end that just calls whichever is the appropriate tool. fsck is a wrapper for the filesystem-specific fsck.
What is mke2fs in Linux?
The mkfs command stands for “make file system” is utilized to make a file system (which is, a system for organizing a hierarchy of directories, subdirectories, and files) on a formatted storage device usually, a partition on a hard disk drive (HDD) or it can also be a USB drive, etc.
What does fsck do in Linux?
fsck computes the number of data blocks and compares that block count against the number of blocks the inode claims. If an inode contains an incorrect count, fsck prompts you to fix it. Each inode contains a 64-bit size field.
What are the contents of super block?
The superblock contains information on the size of the file system, the number of inodes, the number of data blocks, the free and used inodes, and the block size for the file system. The superblock is kept in memory and in multiple locations on disk for each file system.
Where is superblock in Linux?
- Displaying superblock information: sudo dumpe2fs -h /dev/sda3.
- Displaying Information of block groups: sudo dumpe2fs /dev/sda3. This displays information about block groups. …
- Observing more about superblocks: sudo dumpe2fs /dev/sda4 | grep -i superblock. …
- Displaying the version of dumpe2fs: sudo dumpe2fs -V.
What is the importance of superblock?
The most simplest definition of Superblock is that, its the metadata of the file system. Similar to how i-nodes stores metadata of files, Superblocks store metadata of the file system. As it stores critical information about the file system, preventing corruption of superblocks is of utmost importance.
How do I know if my filesystem is corrupted?
The Linux fsck command can be used to check and repair a corrupted filesystem under some situations.
…
Example: Using Fsck to Check and Repair a Filesystem
- Change to single user mode. …
- List the mount points on your system. …
- Unmount all filesystems from /etc/fstab . …
- Find the logical volumes.
How do I repair filesystem in rescue mode?
Run fsck in Rescue Mode
During the boot, hold down the shift key so that the grub menu is shown. Select the “Advanced options”. Then choose “Recovery mode”. In the next menu select “fsck”.
Which command can be used to repair an XFS filesystem?
You can use the xfs_repair command to attempt to repair an XFS file system specified by its device file. The command replays the journal log to fix any inconsistencies that might have resulted from the file system not being cleanly unmounted.
How do I force fsck on next reboot?
touch /forcefsck
To configure file system check on n number of reboots, run the following: tune2fs -c 1 /dev/sda5 — (file system check will run after each reboot before the loading the OS). tune2fs -c 10 /dev/sda5 — will set fsck to run after 10 reboots.
Can fsck cause data loss?
FSCK stands for “File System Consistency check.» Also, data loss is a possibility when you use this command so you should ensure that you have backup of your data before you proceed with the filesystem check.
Is it safe to run fsck?
You can’t run fsck or do anything else safely unless you have backups of all the data you want to keep. If your file system is formatted journaled the chances of this happening are lessened but never go away entirely.