Backup Batteries; Optional Management Server; Backup Power Sequence - HP StorageWorks XP10000 - Disk Array Owner's Manual

The disk array must contain at least one spare disk drive and can contain up to 16. Any of the spare
disk drives can back up any other disk drive of equal rotational speed and equal or lesser capacity,
in any disk chassis, even if the failed disk and the spare disk are in different array domains.
The XP10000 disk array supports 73 GB, 146 GB, 300 GB and 400 GB Fibre Channel disk drives.
Fibre Channel drives are intended as a high capacity, high performance storage option within the
array for high priority applications such as OLTP, Oracle, SAP, and Exchange.

Backup batteries

Internal batteries provide backup power for the cache memory, shared memory, MIXs, CHIPs, and
disk drives. The backup batteries enable the disk array to continue normal operations for up to 20
milliseconds after the loss of AC power.
When AC power is off longer than 20 milliseconds, the disk array executes its backup process. This
process copies the contents of cache and shared memory to disk and then supports cache and shared
memory for up to 36 hours. When AC power is restored after battery backup is exhausted, time is
required for staging data from disk back to shared and cache memory.
of events between a power failure and the battery-powered backup of cache and shared memory.
Figure 3 Backup power sequence
When power is restored, if the Auto-Power-On jumper is in the ENABLE position, the disk array powers
on automatically. If the jumper is in the DISABLE position, you must turn the power switch on to power
up the disk array. HP representatives will assist you in determining which Auto-Power-On mode is
best for your disk array configuration and will configure the selected mode during disk array installation.

Optional management server

HP Remote Web Console allows browser-based management of a single disk array. The optional HP
StorageWorks Command View XP Advanced Edition software may be installed on an optional Device
Manager server to enable additional management capabilities, including the ability to manage multiple
arrays. Other XP software may also be installed on this host; see
17 for information about optional software products.
To protect your security, HP XP Remote Web Console and HP Command View XP Advanced Edition
Software have no access to user data stored on the disk array.
You may use an existing host (such as a storage administrator's PC) as the Device Manager server
provided that it meets system requirements for the required and optional software you plan to deploy.
Figure 4 shows a Command View XP Advanced Edition server connected to an XP disk array. The
management server (1) connects to the disk array (3) using a private Ethernet LAN (2).
Figure 3
"HP XP10000
XP10000 Disk Array Owner's Guide
shows the sequence
Software" on page
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