under high I/O loads.
The single X controller is the only connection to the HP
e3000 supported. We recommend that you purchase
the second Y controller to avoid total controller failure.
The second controller will be able to take over when
swapped into place because it maintains a copy of the
current firmware and disk maps. If your 12H contains
12-18Gb disk drives, we recommend configuring each
of the LUNs for 11Gb of storage.
This configuration has
given the best performance versus capacity. This capacity
allows for RAID1 and available space for two hot spare
disks. Total capacity of the LUNs should not exceed 90Gb
to ensure optimum performance.
We also recommend that you set Data Resiliency Mode
“Normal.” However, some users have reported very
slow Restore speeds with Normal mode. To correct this
problem, set the Data Resiliency Mode to “Performance
Mode” only during the restore. Remember to reset the
mode back to Normal when your large restore is completed.
Set Rebuild Priority to High. This may cause some degradation
in your online transaction response times (probably
not noticeable), but will reduce the likelihood of encountering
a disk mechanical failure while the system is
still recovering from a previous disk mechanical failure.
We hope this information helps you to improve your
confidence in your system. For additional information or
questions, contact us. Resource3000 is dedicated to ensuring
the continuation of your significant investment
in the HP3000 platform.