Re: PR/45162 CVS commit: src/sys/dev/raidframe

[Greg Oster <oster%netbsd.org@localhost>]

The following reply was made to PR bin/45162; it has been noted by GNATS.

From: Greg Oster <oster%netbsd.org@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: PR/45162 CVS commit: src/sys/dev/raidframe
Date: Fri, 23 Jul 2021 16:42:18 -0600

 It turns out the 'fix' for this PR is not as obvious as it once seemed.
 
 RAIDframe *does* support RAID 1 with more than 2 components, but not in 
 the way one might expect.  Given six components: a, b, c, d, e, and f, 
 RAIDframe will create a 2-dimensional array, where the concatenation of 
   a, c, and e will be mirrored by the concatenation of b, d, and f.
 
 Where things are falling apart is with an odd number of components, 
 which now fails (until someone writes a n-way RAID 1 for RAIDframe).
 
 Later...
 
 Greg Oster