Messages in this thread |  | | Date | Wed, 10 Jan 2001 01:33:10 +0100 (CET) | From | Ingo Molnar <> | Subject | Re: Change of policy for future 2.2 driver submissions |
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On Tue, 9 Jan 2001, Hubert Mantel wrote:
> Right, but now there is a problem: Software RAID. The RAID code of > 2.4.0 is not backwards compatible to the one in 2.2.18; if somebody > has used 2.4.0 on softraid and discovers some problem, he can not > switch back to some official 2.2 kernel. [...]
that is simply not true - at least for the RAID0 and LINEAR mdtools arrays. You can start up 'new' RAID devices via mdtools just fine, even if these new devices have RAID-superblocks. (because those superblocks are at the end of the device, and ext2fs knows the true size of the filesystem.)
you have to keep two sets of configuration files (/etc/raidtab and /etc/mdtab), but that is not new nor unreasonable. The tools do not clash either.
[ the only category impacted are people who are still using the RAID1/RAID4,5 code in the stock 2.2 kernel - i do believe the number of these people is very low, and they should imminently upgrade to the 0.90 driver anyway, for stability and data integrity reasons. ]
Ingo
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