diff options
| author | Thomas Schwinge <tschwinge@gnu.org> | 2009-05-20 09:34:58 +0200 |
|---|---|---|
| committer | Thomas Schwinge <tschwinge@gnu.org> | 2009-05-20 09:43:33 +0200 |
| commit | 1fa5485bc29dc9f62bc5f4874dfd09daec539ca1 (patch) | |
| tree | 3eb6ec7626a8f130d9082f990ce7adab2b399d6e /hurd/libstore/examples | |
| parent | 52473c478efac9c86918e4e2ff6e7d575bc61918 (diff) | |
hurd/libstore/examples/ramdisk: New file.
Explain how to create a simple ramdisk based on the zero store routed through
the copy store. Notice a ext2fs bug.
Diffstat (limited to 'hurd/libstore/examples')
| -rw-r--r-- | hurd/libstore/examples/ramdisk.mdwn | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/hurd/libstore/examples/ramdisk.mdwn b/hurd/libstore/examples/ramdisk.mdwn new file mode 100644 index 00000000..069319fb --- /dev/null +++ b/hurd/libstore/examples/ramdisk.mdwn @@ -0,0 +1,32 @@ +[[!meta copyright="Copyright © 2009 Free Software Foundation, Inc."]] + +[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable +id="license" text="Permission is granted to copy, distribute and/or modify this +document under the terms of the GNU Free Documentation License, Version 1.2 or +any later version published by the Free Software Foundation; with no Invariant +Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license +is included in the section entitled [[GNU Free Documentation +License|/fdl]]."]]"""]] + + $ settrans --create --active ramdisk0 /hurd/storeio -T copy zero:32M + $ mkfs.ext2 -F -b 4096 ramdisk0 + [...] + $ settrans --active --orphan ramdisk0 /hurd/ext2fs.static ramdisk0 + $ df -h ramdisk0/ + df: Warning: cannot read table of mounted file systems + Filesystem Size Used Avail Use% Mounted on + - 32M 1.1M 30M 4% /media/data/home/tschwinge/ramdisk0 + +This uses [[settrans]] and [[storeio]] to create a ramdisk of 32 MiB by routing +a thusly sized [[zero store|zero]] through the [[copy store|copy]], connecting +that to the `ramdisk0` node, create a `ext2` filesystem on it, and replace the +translator running on the `ramdisk0` node with a instance of the [[`ext2fs` +translator|translator/ext2fs]] running on the same node ([[translator +stacking|translator/stacking]]). + +It is a [[!taglink open_issue_hurd]] why this does only work with +`ext2fs.static`, but not the dynamically linked `ext2fs` (`settrans: +/hurd/ext2fs: Translator died`). + +A (better) alternative would be using the [[`tmpfs` +translator|translator/tmpfs]], but that one is broken at the moment. |