HP ProLiant ML150

Controls and Indicators
Hot Swap Hard Drive Indicators
Each of the hot swap hard drives has two LED indicators:
•
•
Status Indicator
This LED indicates the drive operating condition: normal, warning, or failure.
Activity Indicator
This LED indicates the disk drive access activity. This LED indicator is controlled by the
disk drive directly. When a drive is accessed, the LED indicator shows a green light.
Table 1-2 and Table 1-3 describe the LED signals used to indicate the operation status of a
disk drive.
Table 1-2: Hot Swap Hard Drive Operation Status Conditions
Condition LED Signaling Note
Drive access Activity Green (flashing) Under HDD control*
Drive fault Status Amber (solid)
Drive predictive fault Status Amber (flashing)
Missing management PCA or
jumper cable
Status Amber (solid) For all HDD on SCSI bus A
and/or B
Drive/slot normal (drive present) Status Green Pass through mode
Drive/slot normal (drive not
present)
Status OFF Pass through mode
*During disk drive spin-up or a hung-up situation, the activity LED may stay solid green for a
long period.
Table 1-3: Hot Swap Hard Drive LED Indicator
Status LED Activity Status LED
• Off: Normal or unit not powered • Off: Normal
• Green (solid):
- Normal and under power
- I/O activity
• Green (flashing): I/O activity
• Green (solid for more than one minute):
Disk spinning up or “hung”
• Amber (flashing): predictive failure
• Amber (solid): hard drive failure
1-2 HP ProLiant ML150 Server Operations and Maintenance Guide
HP CONFIDENTIAL Codename: Stone Soup Part Number: 343329-001 Last Saved On: 8/14/03 10:01 AM