SANRAD I3.1.1205 - Manual (Page 113)

Chapter 6: Volume Configuration 6-21
You need to define two parameters to synchronize a volume:
S WITCH P ARAMETER D EFINITION S TATUS E XAMPLE
-src SOURCE
VOLUME ORIGINAL VOLUME
TO SYNCHRONIZE
TO MANDATORY Simple3
-dst DESTINATION
VOLUME NEW VOLUME TO
ADD TO
SYNCHRONINZE MANDATORY Simple5
Example:
The online volume Simple3 is synchronized to the online volume Simple5.
volume mirror sync –src Simple3 –dst Simple5
Creating a RAID 10 and RAID 0+1
You will need two separate commands to create a RAID 10 or 0+1 volume.
RAID 10 first creates mirrored volumes and then creates a striped volume of the
mirrored volumes. This gives the advantage of both high performance and data
redundancy.
In Figure 6-15, in the first mirrored volume, data block 1 is mapped to both
block 1 on Disk 1 and block 1 on Disk 2. Data blocks 3, 5 and 7 are mapped to
blocks 2, 3 and 4 on both Disks 1 and 2.
In the second mirrored volume, data block 2 is mapped to both block 1 on Disk
3 and block 1 on Disk 4. Data blocks 4, 6 and 8 are mapped to blocks 2, 3 and 4
on Disks 3 and 4.
Data blocks 1 and 2 are then compiled in a striped pattern, along with blocks 3 –
8.
RAID 0+1 first creates striped volumes and then creates mirrored volumes of
the striped volumes.