IBM 5786, Removal And Replacement Procedures

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When it is lit, a green LED indicates either of the following:
v
Electric power is present.
v
Activity is occurring on a link. (The enclosure could be sending or receiving information.)
When it is lit, an amber LED indicates a fault or identify condition. If the enclosure or one of the
components on your system has an amber LED turned on solid (not blinking) or blinking, identify the
problem and take the appropriate action to restore the component to a normal operating condition.
For more information about specific LEDs found on or near the major serviceable components in your
enclosure, see “Component and attention LEDs” on page 28.
Storage
Storage is accomplished through the use of standard size SCSI U320 (LVD) disk drives. The disk drives
must be housed in a U3 disk carrier with a standard interposer card (part number 24L0787). Light pipes
located on the disk carriers transmit light from LEDs located on the disk-drive backplane. The LEDs are
used to aid in the identification and failure diagnostics of each disk drive. For more information
concerning disk-drive LEDs used by this enclosure, see “Component and attention LEDs” on page 28.
The following disk drive sizes and speeds are available:
10,000 revolution per minute (RPM) disk drives 15,000 RPM disk drives
v
73.4 GB Ultra320, height =1 inch
v 146.8 GB Ultra320, height =1 inch
v 300 GB Ultra320, height =1 inch
v
36.4 GB Ultra320, height =1 inch
v 73.4 GB Ultra320, height =1 inch
v 146.8 GB Ultra320, height =1 inch
v 300 GB Ultra320, height =1 inch
For an updated listing of supported disk drive sizes, contact your sales representative or next level of support.
The chassis of your I/O enclosure contains 24 hot-plug disk-drive bays. Twelve of the disk-drive bays are
located in the front and twelve disk-drive bays are located in the back of the enclosure. Any disk drive
bay not populated with a disk drive
must contain a "dummy carrier" to control the airflow within the
enclosure. The dummy carrier does not contain light pipes or electrical connection, so enclosure services
cannot determine whether it is installed.
Attention: To avoid overheating of the enclosure components, you must install dummy carriers in
empty disk-drive bays.
The following illustrations show the front and back of the enclosure's disk-drive bay locations. On System
i enclosures, each disk-drive bay contains a LED used to identify the bay. A specific disk-drive bay LED
will be lit as you follow the steps in performing a concurrent removal or replacement procedure on that
bay. The identify LED is amber colored. For more information concerning these LEDs, see “Component
and attention LEDs” on page 28.
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Removal and replacement procedures