HP Surestore Disk Array 12h and FC60 - Manual (Page 231)

Adding Disk Enclosures to Increase Capacity 231
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taken not to cross the cables, as this may cause problems with applications that depend
on a specific path.
6. Rescan the disk array from the host using the ioscan -fnC disk command. The
disk array and the paths to each LUN should be displayed.
This completes the process of expanding the disk array. You can now make the capacity
provided by the new disks available to the host by binding LUNs.