Replacing An Enc Unit; Tools Needed; Before You Begin - Hitachi AMS 2000 Series Service Manual

Replacing an ENC unit

This replacement procedure includes instructions to remove and replace a
failed ENC unit with the power turned on. Before beginning this procedure,
see Chapter 6, Troubleshooting
may encounter with a Hitachi AMS 2100/2300 Storage System and
2, Identifying failed parts
NOTE: Please contact Hitachi Data Systems Support Center before
replacing a control unit.

Tools needed

• Anti-static wrist strap
• Storage Navigator Modular 2

Before you begin

1. Verify the following conditions before replacing an ENC unit:
• The base unit controller firmware is NOT being uploaded or
updated.
• No other parts except an ENC unit have failed and/or are being
replaced at the same time.
• No failures are listed in the Navigator 2 Alerts window except one
for an ENC unit.
2. Note the LED status on the front of both the base and expansion units
before replacing parts. See Chapter 4 in the Hitachi AMS 2000 Family
Storage System Hardware Guide for a description of the LEDs and their
functions. Verify the following conditions:
• No Alarm LEDS are ON anywhere on the base, expansion units, or
modular 2U SAS expansion unit, except the Alarm LED on the ENC
unit you are replacing.
• Neither the Ready or Warning LEDS on the base unit is blinking.
CAUTION!
• When replacing a part with the power turned ON, do not
leave any slot in the array open for more than ten minutes.
Be sure to install the new part within that time. Otherwise,
the loss of cooling air could cause the unit to overheat and
shut down.
• Do not replace any parts while the green Ready LED on the
front of the base unit is blinking at high speed. The blinking
green LED means that a firmware upgrade is being
downloaded to the unit. Wait until after the download is
complete before replacing any parts.
• If a backup battery and an ENC unit fail at the same time,
replace the backup battery first. The failure code for a
backup battery (shown in the Alerts window of Navigator 2)
is W03z0x, W0400x or W3Tz0x.
4–34
to locate the failed ENC unit.
Replacing parts
Hitachi AMS 2000 Family Storage System Service Guide
to identify and resolve problems that you
Chapter