Re: [FAQ-answer] Re: soft RAID5 + journalled FS + power failure =problems ?

[Stephen C. Tweedie]

Hi,

Chris Wedgwood writes:

 > > This may affect data which was not being written at the time of the
 > > crash.  Only raid 5 is affected.
 > 
 > Long term -- if you journal to something outside the RAID5 array (ie.
 > to raid-1 protected log disks) then you should be safe against this
 > type of failure?

Indeed.  The jfs journaling layer in ext3 is a completely generic
block device journaling layer which could be used for such a purpose
(and raid/LVM journaling is one of the reasons it was designed this
way).

--Stephen