Diff for "InitramfsDebug"

Differences between revisions 2 and 5 (spanning 3 versions)

?wiki:initramfs-tools is used in Debian to build the initramfs that contains the early userspace and the needed kernel modules to be able to mount any possible root.

Boot

Boot with rootdelay=9 to shorten the time of waiting for the root device to come up. Also it adds time to scsi device to settle before calling mdadm or lvm thus excluding potential races.

Debug Howto

Check root device existance
```
 ls -l /dev/[hs]da*
```
Check root boot argument
- It needs to be the same than aboves root device
```
 cat /proc/cmdline
```
Check correct fs recognition
```
 /lib/udev/vol_id -t /dev/sda1
 fstype /dev/sda1
```
- If the output of aboves command differ, your partition was not cleanly formated. For example mkfs.ext2 does not clear all sectors when formating a partition.
Check if the ata/ide/scsi driver is loaded
```
 cat /proc/modules
```

-  ⇤ ← Revision 2 as of 2007-06-25 23:13:17 → 
  Size: 736
  Editor: ?maximilianattems
  Comment: formatting
+   ← Revision 5 as of 2007-06-25 23:17:52 → ⇥
  Size: 939
  Editor: ?maximilianattems
  Comment: formatting
-Deletions are marked like this.
+Additions are marked like this.
 Line 2:
+== Boot ==

Boot with {{{rootdelay=9}}} to shorten the time of waiting for the root device to come up. Also it adds time to scsi device to settle before calling mdadm or lvm thus excluding potential races.
-Line 21:
+Line 26:
-  {{{ 
  /lib/udev/vol_id -t /dev/sda1
  fstype /dev/sda1
  }}}
+ {{{ 
 /lib/udev/vol_id -t /dev/sda1
 fstype /dev/sda1
 }}}
-Line 30:
+Line 35:
-   {{{
   cat /proc/modules
   }}}
+ {{{
 cat /proc/modules
 }}}