Hitachi CBL, Hardware Service Manual

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Procedures before and after replacing components
3–5
Hitachi Unified Storage Hardware Service Guide
• If only the main switch power is off, power is provided by the basic
supply. Do not leave components removed from the storage system for
long periods of time, as this can trigger a power supply alarm.
• Never replace components when powering on the storage system.
Guidelines to follow after replacing a component
Observe the following guidelines after replacing a component in the Hitachi
storage system.
• When restarting the storage system, wait for the POWER LED to go
OFF and then turn off the main switch. Wait at least one minute before
turning on the main switch.
• If the storage system is used at the remote end of a TrueCopy Remote
Replication or TrueCopy Extended Distance configuration, restarting the
storage system causes the following conditions:
- The paths of TrueCopy Remote Replication or TrueCopy Extended
Distance are both blocked.
- E-mail alert, SNMP Agent Support Function, and TRAP notifications
occur when the path is blocked.
Follow the instructions in the notifications. The blocked path recovers
automatically after restarting the storage system.
- If the status of the pair of TrueCopy Remote Replication or
TrueCopy Extended Distance is PAIR or COPY, the pair changes to
PSUE. Suspend the pairs before restarting the array.
• For storage systems that have the Power Saving/Power Saving Plus
option, performing a spin-down and then restarting the storage system
before the spin-down completes can cause the spin-down to fail. Check
that no RAID Group has a power saving status of Normal (command
monitoring) after performing the spin-down, and then restart the
array. If the spin-down fails, perform the spin-down again.
• When you finish replacing components, close all the external storage
system covers.
Replacement parts
Table 3-1 on page 3-6 lists information about replacement parts for Hitachi
Unified Storage systems. In the table, the status definitions of the host and
the storage system are as follows:
• With I/O = there is I/O activity from the host.
• Without I/O: there is no I/O activity from the host.
NOTE: In Table 3-1 on page 3-6 , an asterisk next to the model name
indicates that the part complies with the Restriction of Hazardous
Substances Directive (RoHS).