Hitachi AMS 2100, Service Manual

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4–2
Replacing parts
Hitachi AMS 2000 Family Storage System Service Guide
Before starting maintenance
Even if you are an experienced storage administrator or technician, please
take the time to read the instructions before doing anything. The few
minutes you spend ahead of time can save you a lot of time later.
Prerequisites
Please read this entire section before beginning any work on an array.
In addition to these prerequisites, also see the safety instructions in the
Safety guidelines section of this manual.
Before adding or replacing any hardware components in either a base unit
or an expansion unit, protect your data from accidental loss. The following
paragraphs provide important information that can help protect your array
from accidental loss of data.
1. The procedure to add an optional component varies depending on the
component being added and the location where the component is to be
installed.
2. Before adding, removing, or replacing a part, read the entire
procedure. If you have any questions about the procedure, please call
Hitachi Data Systems Technical Support before starting the procedure.
It is a lot easier, faster, and less costly than fixing something afterward.
CAUTION! Back up your data before adding or replacing hardware
components. If a part is installed or configured incorrectly, it is
possible to lose data from the system. Hitachi Data Systems
strongly recommends that you back up your data to a remote array
before beginning hardware upgrades or replacements.
When hot-swapping parts, complete the installation of the
replacement part within ten minutes. If a slot in any unit in the
array is left open for more than ten minutes, the loss of cooling air
could cause the unit to overheat and shut down.
Wait at least 20 seconds after removing a part from the system
before replacing it.
Do not replace any parts while the green Ready LED on the front of
the base unit is blinking at high speed because the firmware is
being downloaded at that time. Wait until the Ready LED is ON
before replacing parts. Note that the download can take as much as
30 to 50 minutes on an AMS 2100/2300 or 40 to 60 minutes for an
AMS 2500.
If you remove a SAS self-encrypting drive (SED) from an array, a
Data At Rest Encryption feature locks the drive, completely
preventing access to its contents. Data cannot be accessed until the
drive is placed back into the original array by IT administration and
unlocked. If the drive is installed in a different array, the drive
becomes unusable and requires intervention by Technical Support.
To avoid this situation, always check that you are installing the
correct SAS (SED) drive into the appropriate array.