Peter Rabbitson wrote:
On Thu, Mar 01, 2007 at 06:12:32PM -0500, Bill Davidsen wrote:
I have three drives, with some various partitions, currently set up like
this.
drive0 drive1 drive2
hdb1 hdi1 hdk1
\_________RAID1________/
hdb2 hdi2 hdk2
unused \___RAID0____/
200GB 100GB x 2
hdi3 hdk3
\___unused___/
100GB x 2
What I want to have is 3 x 200 = 400GB RAID5.
I would like to avoid copying 200GB of data to another machine and back
Can't you do the following:
* copy the data from raid0 to hdb2 ( raid0 <= hdb2 you can even do a dd)
* degrade raid1 to only contain drive0
* since you have all your data on drive0, wipe drive1 and drive2 clean,
create a degraded raid5
* copy stuff from drive0 to the new array (enw fs as well I presume)
* resync the raid5 with drive0
The RAID1 is "most critical" data, and would never voluntarily be
degraded. And since I only want to combine hd[ij][23] I would have no
reason to do that. Other than that, it seems possible, assuming that
mdadm will actually create the degraded RAID5 array with enough room for
the data.
I'm testing that now.
--
bill davidsen <davidsen@xxxxxxx>
CTO TMR Associates, Inc
Doing interesting things with small computers since 1979
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