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Boot Managers / boot manager plpbt-5.0.15 linux
« Last post by pdb128 on October 09, 2019, 14:32:15 PM »
when trying  on linux to boot from a (valid) USB stick containing  also a linux iso with the command

plpcfgbt hiddenusb plpbt.bin     ->  results only in

data error

On another subject your captcha is way too difficult for me compared to almost all previous encounters. Your letters always have 1 or 2 which are not legible. Could you relax it a bit please.
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Boot Managers / Re: Unable to mount SD card
« Last post by Brettvan on October 08, 2019, 20:15:25 PM »
i'll check it out. 

Yes, SD cards rock in comparison to a usb 2.0. 
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Boot Managers / Re: Unable to mount SD card
« Last post by aclef on October 08, 2019, 17:36:43 PM »
Glad to see I'm not the only one running linux on SD cards :D

PS: Running Linux on SD card with EXT4 may not be a good idea, because wear leveling mechanism in SD cards are usually weak(like local dynamic wear leveling), and journaling filesystem can kill USB drives(without sophisticated SSD controller) relatively fast, even faster with SD card.

I'd recommend using COW filesystems like BTRFS(if you want compression but with more intricacies), or log-structures FS like F2FS/NILFS2.

PS2: Do not turn on discard mount option on a SD card if 1)you are going to use BTRFS on SD card and 2)The SD card reader is connected to your computer via PCI-e. This combination will cause data loss regardless of  card brand. (I don't know yet why)
My mount option for SD card with BTRFS is: noatime, compress=zlib, commit=0,ssd_spread, autodefrag, nodiscard. Which has been tested on multiple cards and works flawlessly.
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Boot Managers / Re: Unable to mount SD card
« Last post by Brettvan on September 30, 2019, 23:30:21 PM »
Hi Elmar

I was able to get it working today by creating a PlopKexec.cfg file in the /boot partition of the SD card. I changed all the attributes to match my linux to boot.

Inside the that config file is the following:
Code: [Select]
TIMEOUT 10
DEFAULT LinuxMX

LABEL LinuxMX
   LINUX ./vmlinuz-4.19.0-5-amd64
   APPEND boot=/dev/mmcblk0p2 rw
   APPEND root=/dev/mapper/rootfs rw
   INITRD ./initrd.img-4.19.0-5-amd64

This SD card is encrypted with a LUKS partition.  Good to know that it boots despite the extra complication :).  This worked on my work computer so in theory it should work with my t410.  I won't know until i get home to test.

Thanks.
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HFS+ Rescue / Re: HFS on SSD, logical page map with duplicates
« Last post by peterpion on September 30, 2019, 20:20:22 PM »
Hi Elmar,

No worries I appreciate you looking. I have made some progress since I posted last, now I can mount the disk, but I am unable to descend into some folders (because I assume their directory files are the wrong blocks).

BTW I am looking into finding the main translation table on the disk but if I don't find it, I wonder if there is an easier way.

My idea is to modify HFS rescue to let it choose the logical blocks that make sense to it. IE load it with an array (that I already have made) of the alternative data blocks, it can try them one by one to see if any 'make sense' to it.

You see the problem is that for 4% of the sectors on the drive, I have several possible blocks of data that might be the right ones. I don't know which to choose from. For instance sector 724557 (as the linux OS sees it) might actually be physical block 1298322, 932022 or 331922 in my image file. I have the 'spare' sectors saved in a different place. The 'wrong' copies will have been overwritten with other files, so in some cases I am sure it will not be possible to differentiate between right and wrong, but if I can do that for the file structure (directory information) that would be great.

The reason is that the drive can actually store 274GB of raw data but only shows 256GB of this to the operating system usually.

Anyway as I say as the author of HFS rescue I wonder if you could say if this would be possible. If not, it would save me time looking through the code and trying to make the modifications but if you say yes it would be possible and give me a couple of pointers as to where to code the modifications I will get working on this instead of working on finding the translation table, since it is proving very difficult.

Thanks again, Pete
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Boot Managers / Re: Unable to mount SD card
« Last post by Elmar on September 30, 2019, 17:15:48 PM »
You don't have to compile a custom image.

Is '/boot' on an own partition?
What files are in '/boot'?
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Boot Managers / Re: Unable to mount SD card
« Last post by Brettvan on September 30, 2019, 17:01:50 PM »
Hi Elmar,

Thanks for the reply.

I am using the plopkexec bootmanager to try and boot the SD card.  Based on another thread, it looks like it's possible.

https://forum.plop.at/index.php/topic,1892.0.html

I am just having troubles with understanding how to do the custom setup. like adding the bootup files to the /boot directory?  is that on the SD card or on the plopexec image?  Is this a custom image i have to compile?  Thanks,

here is the error message in the booting log:
Can not mount /dev/mmcblk0
...
Can not mount /dev/mmcblk0p1
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Boot Managers / Re: Unable to mount SD card
« Last post by Elmar on September 30, 2019, 08:27:17 AM »
Hello,

are you sure that you talk about the Plop Boot Manager and not about PlopKexec? The Plop boot manager has no shell.

Best regards
Elmar
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Boot Managers / Unable to mount SD card
« Last post by Brettvan on September 29, 2019, 16:36:49 PM »
Hi

I am trying to boot my Linux MX on my SD card using an old IBM Lenovo ThinkPad t410.

I problem is that when I load up plop boot manager it fails to mount the SD card. It looks like the SD card has a EXT 4 partition and should be mountable but fails. How do I work around this so I can boot SD card? Is there a way to do this within the shell and boot it in a roundabout way?

Thanks Brett
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HFS+ Rescue / Re: hfsprescue - stuck at step 2
« Last post by Elmar on September 29, 2019, 11:40:21 AM »
Hello,

With the above mentioned way I could recover nearly everything of the partition.

Excellent :)

Best regards
Elmar
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