Dell PowerEdge 1500SC - Manual (Page 7)

Indicators on the front of the system are located on the power supplies, hard drives, and the control panel. The CD and diskette drives have green activity
indicators.
Figure 2-2. Front-Panel Features
Back-Panel Features
Figure 2 -3 shows the back-panel features of the system.
Figure 2-3. Back-Panel Features
SCSI Hard Drive Indicator Codes
If you have an optional RAID controller installed, three indicators on each of the hard drive carriers provide information on the status of the SCSI hard drives
(see
Table 2 -1 ). The SCSI backplane firmware controls the drive online and drive failure indicators.
Figure 2-4. Hard-Drive Indicators