Chapter 2. Installing the expansion unit
11
Removing CRUs
It is easier to lift the expansion unit and install it in a rack or tower enclosure if you
remove all CRUs (disk drives, power supplies, and ESMs) first. A fully loaded
expansion unit with 14 hard disk drives and two power supplies installed weighs 36.1
kg (79.5 lb). The standard unit with two power supplies weighs 22.5 kg (49.5 lb). If
you remove all the CRUs, you can reduce the overall weight.
Attention:
If you have data stored on the drives, label the drives before you remove
them. Then, when you replace the drives, install each one in the same drive bay from
which you removed it. Failure to do so could result in a loss of data.
See “Chapter 3. Installing and replacing devices,” on page 25 for information on
removing the CRUs.
Setting the interface options and ID settings
When you install a drive CRU in the expansion unit, the drive tray plugs into a
printed circuit board called the midplane. The midplane sets the SCSI bus number and
ID automatically.
The switch card located on the back of the expansion unit has five external option
switches, four internal option switches, and a unit ID switch. It is easier to set these
switches before you install the expansion unit in a rack or tower enclosure.
Statement 4
≥
18 kg (37 lbs)
≥
32 kg (70.5 lbs)
≥
55 kg (121.2 lbs)
CAUTION:
Use safe practices when lifting.
Содержание Netfinity EXP300
Страница 1: ...IBM IBM Netfinity EXP300 Installation and User s Guide SC19 K842 30...
Страница 2: ......
Страница 3: ...IBM IBM Netfinity EXP300 Installation and User s Guide SC19 K842 30...
Страница 6: ...iv IBM Netfinity EXP300 Installation and User s Guide...
Страница 36: ...24 IBM Netfinity EXP300 Installation and User s Guide...
Страница 46: ...34 IBM Netfinity EXP300 Installation and User s Guide...
Страница 52: ...40 IBM Netfinity EXP300 Installation and User s Guide...
Страница 68: ...56 IBM Netfinity EXP300 Installation and User s Guide...
Страница 71: ......