POWER7 information

Storage

Your enclosure uses disk drives to store data.

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. The following disk drive sizes and speeds are available:

10,000 revolution per minute (RPM) disk drives	15,000 RPM disk drives
73.4 GB Ultra320, height =1 inch 146.8 GB Ultra320, height =1 inch 300 GB Ultra320, height =1 inch	36.4 GB Ultra320, height =1 inch 73.4 GB Ultra320, height =1 inch 146.8 GB Ultra320, height =1 inch 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 .

Figure 1. Front view of your I/O enclosure

Index number	Description
1	5786, 7031-D24 disk I/O enclosure (front of rack drawer configuration)
2	Shows 12 disk-bay location
3	Enclosure status panel
4	5787, 7031-T24 disk I/O enclosure (front of deskside configuration)
5	Disk drive bay identify LED locations-front (on System i models only)

Figure 2. Back view of your I/O enclosure

Index number	Description
1	5786, 7031-D24 disk I/O enclosure (back of rack drawer configuration)
2	Shows 12 disk-bay location
3	5787, 7031-T24 disk I/O enclosure (back of deskside configuration)
4	Disk drive bay identify LED locations-back (on System i models only)

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Last updated: Wed, January 07, 2015