HP Surestore Disk Array FC60 HP SureStore E Disk Array FC60 - (English) Advanc - Page 224

Adding Disk Enclosures to Increase Capacity Scalability is an important part of the design of the HP SureStore E Disk Array FC60. The capacity of the disk array can be increased in a variety of ways to meet growing storage needs. See "Adding Capacity to the Disk Array" on page 254 for more information on scalability options. Adding disk array enclosure(s) is the most effective way of significantly increasing the capacity of the disk array. It is also the most involved. The following procedure describes the process of adding disk enclosures to the disk array configuration. Note This procedure should be performed by properly trained personnel only. General Rules for Adding Disk Enclosures to the Disk Array • Shutting Down the Disk Array - Adding one or more new disk enclosures requires powering off the entire disk array. This will make all data on the disk array unavailable during the expansion process. • Backing Up Data -All data on the disk array should be backed up to prevent data loss should problems occur during the expansion. • Maintaining High Availability - Adding disk enclosures will typically require that you convert existing disk enclosures from split-bus configuration to full-bus configuration. This may result in more than one disk in a LUN being on the same channel. This will necessitate moving disks to other enclosures following the expansion. For optimum high-availability, there should never be no more than one disk from a LUN on each channel. • Moving Disk Modules - When moving disks during the expansion, it is recommended that disks be moved to the enclosure and slot that correspond to the original channel:ID of the disk. For example, if the disk was originally installed in the slot corresponding to channel 4, ID 1, it should be moved to the slot that corresponds to the same values following the expansion. Although disks can be moved to any slot, maintaining the same channel:ID simplifies LUN management. 224 Adding Disk Enclosures to Increase Capacity