Manage to spare 2 IDE drive. Create 3 partition of 100MB on each and construct
Raid5
md1= hdc1, hdc2, hdc3
md2= hdd1, hdd2, hdd3
md0= md1, md2
but when try to construct Raid1(md0) on top of them system hanged. this is the
responce ....
========================================
handling MD device /dev/md0
analyzing super-block
disk 0: /dev/md1, 205440kB, raid superblock at 205376kB
disk 1: /dev/md2, 208640kB, raid superblock at 208576kB
bind<md1,1>
bind<md2,2>
md2's event counter: 00000000
md1's event counter: 00000000
md: md0: raid array is not clean -- starting background reconstruction
raid1: raid set md0 not clean; reconstructing mirrors
md2 [events: 00000001](write) md2's sb offset: 208576
Got md request, not good...
=======================================
This is the last line of syslog (md2's event counter: 00000000)
Any idea?
Lance Robinson wrote:
> I assume you are looking for double redundancy--survive a double failure.
>
> It would be more efficient to do raid5 on top of several raid1 arrays. You
> will have more arrays, but the checksum will only be calculated once. If you
> tried raid1 above raid5, you would be calculating the checksum twice (once
> for each raid5)
>
> I think the device structure will allow the layering. However, doing an
> auto-start isn't possible. Try it out, let us know if and how it works.
>
