E2compr 0.4 User Manual – cannot mount

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If you get one of these two error messages from the kernel:

EXT2-fs: : couldn’t mount because of unsupported optional features.EXT2-fs: : couldn’t mount because of unsupported compressionalgorithms

then probably your kernel does not have support for e2compr, or was notcompiled with support for the listed compression algorithms.

Three options:

  1. Use a kernel that does support them. If the kernel that doesn’t supporte2compr is for a rescue disk, remember that you can use your normal harddisk kernel but pass the kernel a `root=/dev/fd0′ (or whatever)option.
  2. Pass the kernel the `force-compat’ mount option. At the time ofwriting, the `force-compat’ mount option is accepted only bye2compr kernels, so this probably won’t help with the first of theseproblems.
  3. Deliberately clear the FEATURE_INCOMPAT_COMPRESSION flagfrom the superblock of the filesystem you wish to mount.See section How do I uninstall e2compr?, the last two paragraphs.

If you use one of the last two options above, and later get `I/Oerror’ messages from some programs, it probably means that they tried toread part of a file that was compressed with an algorithm not supportedby the current kernel. (See the kernel log to confirm whether this isthe case or whether it’s a physical I/O error.)

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E2compr 0.4 User Manual – Algorithms

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The Bridge 2000-July Archive by Author

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[Bridge] Q: 802.1q?

Wayback MachineAbout this captureCOLLECTED BY Organization: Alexa Crawls Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period. Collection: Alexa Crawls DE Crawl data donated by Alexa Internet. This data is currently not publicly accessible TIMESTAMPSloadingSteven Dewintersteven@zeus.rug.ac.be
Fri, 18 Feb 2000 15:23:46 +0100 (NFT)> I’m relatively new to this list, so forgive me if these questions have> been asked before.Welcome :)> – Is there an archive of this list?Yes: http://openrock.net/mailman/listinfo/bridge greets Steven MMM \|/ www __^__ (o o) @ @ (O-O) /(o o)\(o)—-ooO-(_)-Ooo—oOO-(_)-OOo—oOO–(_)–OOo—oOO==(_)==OOo—-(o) ( ( ) Linux… because I’m better than you. ) ( ((o)—————————————————————–(o)