Dell PS4100, Hardware Maintenance Manual

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7
2 Maintaining Drives
You can replace a failed drive while the array remains running.
About Drive Types
Depending on your configuration, your array supports up to 24 2.5-inch SAS drives or up to 12 3.5-inch
SAS drives in internal drive bays.
Drives are connected to a backplane through drive carriers and are hot-swappable.
Drives are supplied in a carrier that is keyed to fit into specific array models, and cannot be installed in other
Dell arrays or arrays not from Dell Inc.
Identifying Failed Drives
A drive failure is indicated by:
• LEDs on the drive. See Interpreting Drive LEDs .
• A message on the console, in the event log, or in the Group Manager Alarms panel.
• Indications in the Group Manager Member Disks window or the CLI
member select show disks
command output.
Behind the bezel, arrays have a label showing the drive numbering for that specific array model:
• In arrays with 2.5-inch drives (installed vertically in a row), the drives are numbered 0-23, left to right.
• In arrays with 3.5-inch drives (installed horizontally), the drives are numbered from left to right and top
to bottom, starting with 0 on the upper left side.
Table 3 shows the drive order for the 3.5-inch drives.
Table 3 3.5-inch Drive Numbering
Interpreting Drive LEDs
The LEDs on a 3.5-inch drive are shown in Figure 6 . The LEDs on a 2.5-inch drive are shown in Figure 7 .
Drive LED states are described in Table 4 .
0 1 2 3
4 5 6 7
8 9 10 11