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I create the meta devices:

metainit d102 1 1 /dev/dsk/c1t2d0s6
metainit d103 1 1 /dev/dsk/c1t3d0s6
metainit d104 1 1 /dev/dsk/c1t4d0s6
metainit d105 1 1 /dev/dsk/c1t5d0s6

then I make the mirrors :

metainit d120 -m d102
metattach d120 d104

metainit d121 -m d103
metattach d121 d105

and least, I want to make the stripe with :

metainit d130 1 2 d120 d121

and the system answers : d120 is a metadevice. metainit seems to want only a physical component !

So how can I create RAID 1 + 0

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it's not SDS, but you can do that with ZFS. zpool create tank mirror c1t2d0 c1t3d0 mirror c1t4d0 c1t5d0. do you absolutely have to use older-style SDS metadevices? – Tim Kennedy Feb 12 at 15:51

1 Answer

up vote 3 down vote accepted

With SDS, you can only stripe physical disks. If you create a mirror of two equal stripes (a RAID 0+1 volume), SDS will "optimize" that by turning it into a RAID 1+0 volume. So do:

metainit d120 1 2 /dev/dsk/c1t2d0s6 /dev/dsk/c1t4d0s6
metainit d121 1 2 /dev/dsk/c1t3d0s6 /dev/dsk/c1t5d0s6
metainit d130 -m d120
metattach d130 d121

Reference: The Stripe/Mirror Redundancy Experiment with Disksuite

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This is the RAID 0+1 implementation. so, there is no implementation for RAID 1+0 on Solaris ? – MUE Feb 10 at 21:18
If you read the reference link, you'll see that, correct, there is no specific implementation of RAID 1+0 using SDS. SDS will optimize a properly configured RAID 0+1 by implementing it as a RAID 1+0 array. You have to trust that it behaves this way, and the reference link offers up proof that it does. – hrunting Feb 11 at 0:55

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