Bug 142703 - raid modules are not included
raid modules are not included
Product: Red Hat Enterprise Linux 2.1
Classification: Red Hat
Component: mkinitrd (Show other bugs)
ia64 Linux
medium Severity low
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Assigned To: Jeremy Katz
David Lawrence
Depends On:
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Reported: 2004-12-12 22:00 EST by Takayoshi Kochi
Modified: 2007-11-30 17:06 EST (History)
0 users

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2004-12-13 20:53:35 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Takayoshi Kochi 2004-12-12 22:00:23 EST
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Description of problem:
When RAID0 or RAID1 is configured on a system,
the mkinitrd is expected to include raid modules in initrd
and enable autodetection/autoconfiguration of raid devices.

Sometimes it fails to include raid*.o modules depending on
how /etc/raidtab is written.

On AS2.1, mkinitrd checks /etc/raidtab to see what level of raid
is used on a system.  It is done on line 378,

for number in $(grep '^[	]*raid-level' /etc/raidtab 2>/dev/null |
		  awk '{print $2}' | LC_ALL=C sort -u) ; do

In the first argument of grep, characters surrounded by brackets
are expected to be [<SPACE><TAB>] but actually it only contains <TAB>.

If the 'raid-level' lines in /etc/raidtab is indented with
<SPACE>, mkinitrd fails to include the raid module of that level.

When components of a raid array are renamed
(e.g. /dev/sdd + /dev/sde  => /dev/sde + /dev/sdf),
the boot procedure fails to reconstruct the raid array.

To workaround this, permit <TAB> only in /etc/raidtab.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. write /etc/raidtab indented with space
2. start and use raid (on ia64, set raid flag on those partitions with
3. remake initrd
4. reboot with some changes of ordering and position of the components
of the array

Actual Results:  RAID reconfiguration fails.

Expected Results:  RAID reconfiguration succeeds.

Additional info:
Comment 1 Jeremy Katz 2004-12-13 20:53:35 EST
We require the raidtab to be written with tabs instead of spaces.

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