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Old 01-08-2005, 03:43 PM   #1
Registered: Apr 2004
Location: Paris, FRANCE
Distribution: Ubuntu
Posts: 54

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Lightbulb Software RAID: consequences of linux autodetect & persistent-superblock with reiserfs


I'm currently trying to set up software RAID-1 on Mandrake with an existing ReiserFS partition. The chapter 7.2 of the Software-RAID-HOWTO clearly states that :[list=1][*]the kernel must support autodetection (OK)[*]the raid device must be configured to use persistent-superblock (done)[*]the partition needs to be of 0xfd type (done)[/list=1]
Well... this gives me error messages at every boot... Anyway, I don't want to bore anyone with my error messages (I'll ask in another thread if I need), I would just be happy if the following 3 questions were answered :

1/ What is this 0xfd "linux autodetect" type ? Should I still mount the /dev/md0 RAID device using the original reiserfs type ? What entry should I put in my /etc/fstab ?

2/ The error messages tell me that I should run reiserfsck to correct this partition (the master one). But, since I don't expect RAID to change anything on this partition, I suspect either the 0xfd change or the use of persistent-superblock to cause this error ; am I wrong ?

3/ Finally and to be clear : is a partition subject to any change when replicated to another disk it using RAID-1 ?

Note that the partition involved is my /home and has nothing to do with the boot sequence, so I don't need it to be mounted at boot time.

thanks if anybody can help my damaged brain to understand this stuff...


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