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  • squashfs

    2020-12-28 07:13:39
    <div><p>I create an image of squashfs under Windows 7: <pre><code> SquashFileSystemBuilder b = new SquashFileSystemBuilder(); b.AddFile("1.txt", @"1.txt"); b.AddFile("2.txt...
  • SquashFS regression

    2020-11-29 23:05:12
    <div><p>WIth singularity v2.3.1-dist, I have trouble running some (not all) SquashFS images. The images run fine with v2.2.1, but with v2.3.1 I get <pre><code>ERROR : Failed to mount squashfs image in...
  • squashfs文件的解压和压缩

    万次阅读 2020-11-05 11:09:21
    解压: unsquashfs file.squashfs(被解压的文件名称) 压缩: mksquashfs /被压缩的目录 file.squashfs(压缩后的文件名称)

    解压:

    unsquashfs file.squashfs(被解压的文件名称)

    压缩:

    mksquashfs /被压缩的目录 file.squashfs(压缩后的文件名称)

    展开全文
  • Squashfs support

    2020-11-29 10:13:57
    <div><p>Squashfs is a useful mechanism for creating a space efficient (compressed) file system image. This is particularly useful for gigantic runtime environments. This is common for HEP experiments:...
  • SquashFS superblock

    2020-12-29 23:19:20
    <div><p>https://github.com/AgentD/squashfs-tools-ng/blob/master/doc/format.txt</p><p>该提问来源于开源项目:kaitai-io/kaitai_struct_formats</p></div>
  • Exploring squashfs

    2020-12-09 07:29:57
    * mount these using loopback or squashfs on each node (maybe at <code>/img/*/) * unionfs magic to make this "override" <code>/opt/compiler-explorer/*</code> for matches <p>Theory: * 99.99% of ...
  • SQUASHFS error

    万次阅读 2018-07-18 09:56:23
    嵌入式linux系统运行过程中报告SQUASHFS error错误, 并且在系统重启之后就能恢复正常. [ 5742.104968] SQUASHFS error: xz decompression failed, data probably corrupt [ 5742.118815] SQUASHFS error: squashfs...

    嵌入式linux系统运行过程中报告SQUASHFS error错误, 并且在系统重启之后就能恢复正常.

    [ 5742.104968] SQUASHFS error: xz decompression failed, data probably corrupt
    [ 5742.118815] SQUASHFS error: squashfs_read_data failed to read block 0x302780
    [ 5742.132914] SQUASHFS error: Unable to read data cache entry [302780]
    [ 5742.145672] SQUASHFS error: Unable to read page, block 302780, size a478
    [ 5742.159102] SQUASHFS error: Unable to read data cache entry [302780]
    [ 5742.171800] SQUASHFS error: Unable to read page, block 302780, size a478
    [ 5742.185204] SQUASHFS error: Unable to read data cache entry [302780]
    [ 5742.197907] SQUASHFS error: Unable to read page, block 302780, size a478
    [ 5742.211323] SQUASHFS error: Unable to read data cache entry [302780]
    [ 5742.224040] SQUASHFS error: Unable to read page, block 302780, size a478
    [ 5742.237446] SQUASHFS error: Unable to read data cache entry [302780]

    原因是: 

    执行了下面的指令:

    echo 3 > /proc/sys/vm/drop_caches

    这会释放内存中所有的pagecache, dentries and inodes, 所以会导致文件系统找不到cache entry.

     

    关于 /proc/sys/vm/drop_caches的说明:

    /proc/sys/vm/drop_caches (since Linux 2.6.16). Writing to this file causes the kernel to drop clean caches, dentries and inodes from memory, causing that memory to become free.

    To free pagecache, use echo 1 > /proc/sys/vm/drop_caches;

    to free dentries and inodes, use echo 2 > /proc/sys/vm/drop_caches;

    to free pagecache, dentries and inodes, use echo 3 >/proc/sys/vm/drop_caches.

    Because this is a non-destructive operation and dirty objects are not freeable, the user should run sync first.

     

    可以参考这篇文章: http://www.linuxfly.org/post/320/

    展开全文
  • squashfs4.2

    2014-10-23 18:03:03
    SquashFS 是一套基于Linux内核使用的压缩只读文件系统
  • A squashfs experiment

    2020-11-22 21:21:16
    <p>I just did a little experimenting with casync and squashfs, to check the potential. <p>So I used the ArchLinux <a href="http://mirrors.kernel.org/archlinux/iso/2017.06.01/arch/x86_64/airootfs.sfs">...
  • SquashFS是一种高度压缩的只读文件系统,通常用作嵌入式设备,实时系统上的root fs或仅用作压缩存档格式。 可以将其视为可以挂载的.tar.gz(或XZ,LZO,LZ4,ZSTD)。 该项目最初是作为squashfs-tools 4.3的一个...
  • 初识squashfs

    千次阅读 2018-03-07 22:25:22
    在装ubuntu过程中,偶然遇到squarshfs ...[ 135.292409] SQUASHFS error: sb_bread failed reading block 0x9d7f3 [ 135.292411] SQUASHFS error: Unable to read fragment cache block [275faa28] [ 135.292413...

        在装ubuntu过程中,偶然遇到squarshfs error, 例如:

    [ 135.292409] SQUASHFS error: sb_bread failed reading block 0x9d7f3
    [ 135.292411] SQUASHFS error: Unable to read fragment cache block [275faa28]
    [ 135.292413] SQUASHFS error: Unable to read page, block 275faa28, size 23a7

        Squashfs(.sfs)是一套供Linux核心使用的GPL开源只读压缩文件系统。Squashfs能够为文件系统内的文件inode目录结构进行压缩,并支持最大1024千字节的区块,以提供更大的压缩比。

    Squashfs的设计是专门为一般的只读文件系统的使用而设计,它可应用于数据备份,或是系统资源紧张的电脑上使用。(来自维基百科) 

        所以,可以简单的理解为:Squashfs 是ubuntu以及各种linux发行版本的镜像中的一种文件系统。而导致出现这种错误的原因可能有下面几个:

     

    1. 镜像文件不完整,有损耗等等。 解决方法:换个新的镜像文件。
    2. 烧盘的U盘出现问题了,无论怎么重新烧写新镜像都依旧存在这个问题。 解决方法:换个别的U盘进行重新安装试试。
    3. 电脑的硬件——内存条出现问题,这是最不希望看到的,但是如果排除了上面那两个可能性,就要考虑这个可能性了。解决方法:利用memtest86/memtest86+进行内存条测试,如果在正常的情况下出现的坏道比较多,就要考虑更换内存条了。

        此条博客,只是为了记录自己在装ubuntu中遇到的问题和一些自己的见解。如果有不对的地方,欢迎更正。

    展开全文
  • 创建挂载squashfs

    2021-06-05 10:15:48
    创建挂载squashfs 创建 mksquashfs /some/dir dir.sqsh 挂载 mount dir.sqsh /mnt/dir -t squashfs -o loop 设备上创建 mksquashfs /some/dir /dev/fd0 挂载设备 mount /dev/fd0 /mnt/floppy -t squashfs 基于/...

    创建挂载squashfs

    创建

    mksquashfs /some/dir dir.sqsh
    

    挂载

     mount dir.sqsh /mnt/dir -t squashfs -o loop
    

    设备上创建

    mksquashfs /some/dir /dev/fd0
    

    挂载设备

    mount /dev/fd0 /mnt/floppy -t squashfs
    

    基于/etc/fstab挂载

    /var/arch.sqsh	/var/arch	squashfs	ro,defaults	0 0
    

    排除虚拟文件系统

    use the -e option for mksquashfs to exclude all pseudo-filesystems such as /proc, /sys (on linux kernels after 2.5.x) and /dev (when using DevFS)

    mksquashfs floppylinux root.sqsh -e  proc
    

    Squashed file systems on CD-ROMs

    1.Enable SquashFS in the linux kernel of the target system
    2.Create a squashed root file system
    3.Modify the /etc/fstab or startup scripts of the target system to mount the squashd file system when you need it

    构建可读写文件系统

    Create the ro.fs squashed file system and the rw.fs dir

    mksquashfs /home/user1 ro.fs
    mkdir /home/rw.fs
    

    先挂载不可写的squashfs

    mount -t squashfs ro.fs /mnt -o loop
    

    再挂载unionfs文件系统
    mount the unionfs file system, that makes /mnt and /home/rw.fs apparently merged under /home/user1 location.

    合并挂载mnt和rw.fs文件夹到user1目录

    mount -t unionfs -o dirs=rw.fs=rw:/mnt=ro unionfs user1
    

    切换到最终可读写的根文件系统

    cd /realroot/mnt/Image
    chroot target /bin/sh
    

    参考链接:
    https://blog.csdn.net/u013566722/article/details/52494824
    https://www.cnblogs.com/zhishuai/p/8205229.html
    https://tldp.org/HOWTO/SquashFS-HOWTO/creatingandusing.html
    https://www.unix.com/man-page/FreeBSD/8/mount_unionfs/
    https://unionfs.filesystems.org/
    https://cloud.tencent.com/developer/article/1518056
    https://www.cnblogs.com/pengdonglin137/p/3521408.html
    https://blog.csdn.net/qq_15770331/article/details/97000866
    https://unix.stackexchange.com/questions/209920/squashfsunionfs-as-root-filesystem

    展开全文
  • <div><p>I have written <a href="https://github.com/probonopd/AppImageKit/blob/19bd4c23a5e5e23786c2ad1f13666ee1e9117036/runtime.c#L226-L323">code that extracts squashfs</a>. When trying to extract some...
  • 创建squashfs

    2018-01-05 16:13:00
    SquashFS 通常的livecd都有一个这个文件,是核心的文件系统 SquashFS 也是一个只读的文件系统,它可以将整个文件系统压缩在一起,存放在某个设备,某个分区或者普通的文件中。如果您将其压缩到一个设备中,那么您...
  • SQUASHFS error: Unable to read page, block 59daf0, size adbc free -m SQUASHFS error: Unable to read data cache entry [61ee8] SQUASHFS error: Unable to read page, block 61ee8, size f2b0 Bus error root:...
  • Implement SquashFS support

    2020-11-29 18:08:56
    <div><p>Currently, we use a FAT file system for both boot...<p>The most promising candidate for a simple root file system seems to be SquashFS.</p><p>该提问来源于开源项目:gokrazy/gokrazy</p></div>
  • squashfs image not working

    2020-11-29 15:16:23
    /storage/local/data1/cvmfs/rhel6.squashfs: Squashfs filesystem, little endian, version 4.0, 363704024 bytes, 31213 inodes, blocksize: 131072 bytes, created: Sat Sep 23 16:52:26 2017 <p>bash-4.1$ ...
  • ubuntu 制作squashfs

    千次阅读 2018-11-26 15:35:44
    $sudo apt-get install squashfs-tools genisoimage //装入 squashfs文件系统处理工具以及 ISO制作工具 $sudo modprobe squashfs //加载 squashfs模块   二、提取光盘内容 1、创建一个livecd文件夹作为工作目录...
  • squashfs module is missing

    2020-12-09 07:43:56
    <div><p>I get unknown filesystem type 'squashfs' trying to mount or manipulate squashfs. Can we add the kernel module?</p><p>该提问来源于开源项目:raphael/linux-samus</p></div>

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