Bug 247119

Summary:	Request: Disk Druid support for installation on RAID-1 degraded array
Product:	[Fedora] Fedora	Reporter:	Gerry Reno <greno>
Component:	anaconda	Assignee:	Anaconda Maintenance Team <anaconda-maint-list>
Status:	CLOSED DUPLICATE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	low
Version:	7	CC:	aaron
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-07-09 15:24:19 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Gerry Reno 2007-07-05 14:59:13 UTC

I have been using a technique that at least for me greatly simplifies moving 
to and from RAID-1 on any system.  I do this by installing the system on a 
degraded RAID-1 array and then later it is very simple to make the system true 
RAID by just adding the missing drive/partitions.

 In Disk Druid I would like to see the ability to install on a degraded RAID-1 
array where I declare RAID-1 but then the second mirror is missing.  I install 
this way all the time on systems and then when I add the second hard drive 
later and place it into the array, it just syncs.  Want to go back to just a 
single drive - no problem.  Just fault the device and remove it.  No 
complicated remounting filesystems or anything - very smooth.  This way you're 
always on an md device.  I would like to see this actually become the default.  
It makes it very easy to convert a system to RAID-1 later on if the user would 
like to do so without any complicated procedures necessary.

Comment 1 Gerry Reno 2007-07-08 19:09:21 UTC

Just to clarify our setup.  We establish the degraded RAID-1, let's say
/dev/md0, and then we use this device as an LVM physical device and layer LVM
over the RAID. Then we mount an LVM logical device (eg:
/dev/mapper/VolGroup00-LogVol00) containing the root (/) filesystem.  The point
being that the degraded RAID-1 is no different than using any other RAID device
to form a filesystem mounting solution.

Comment 2 Peter Jones 2007-07-09 15:24:19 UTC


*** This bug has been marked as a duplicate of 188314 ***