Dell PowerVault 220S (SCSI) - Manual (Page 17)

Basic Troubleshooting : Dell PowerVault 220S and 221S Systems Service Manual
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Drive(s) not seen during the host boot
If any of these events occur, perform the following diagnostic steps:
1. Is the green AC status LED indicator on the power supply(s) illuminated? (See Figure 8 for location.)
No. See " Troubleshooting a Power Supply ."
Yes. Go to step 2.
2. Are the following system components updated with the latest firmware and device drivers?
Enclosure EMM
Hard-disk drives
Host bus adapter or PERC
No. Download the latest firmware and/or drivers from the Dell Support website at support.dell.com.
Yes. Go to step 3.
3. Is the amber over-temperature LED on the front of the system illuminated? (See Figure 2 for location.)
No. Go to step 4.
Yes. One or more temperature sensors are in the warning range. Check environmental conditions (high ambient
temperatures, ventilation blockage, etc.) and cooling modules for failures. Replace failed cooling modules (see " Replacing
a Cooling Module "). For more information, see " Troubleshooting a Cooling Module ."
4. Is the amber fault indicator on the back of the power supply illuminated? (See Figure 8 for location.)
No. Go to step 5.
Yes. A power supply has failed. Replace the failed power supply (see " Replacing the Power Supply "). For more
information, see " Troubleshooting a Power Supply ."
5. Is the amber fault indicator for either cooling module blower illuminated? (See Figure 8 for location.)
No. Go to step 6.
Yes. One of the cooling module blowers has failed. Replace the failed module (see " Replacing a Cooling Module "). For
more information, see " Troubleshooting a Cooling Module ."
6. Is the amber fault indicator on an EMM illuminated? (See Figure 5 for location.)
No. Go to step 7.
Yes. An EMM has failed. Replace the EMM (see " Removing and Installing an EMM or SCSI Terminator Card ").
7. Is the power indicator on the split-bus module illuminated? (See Figure 5 for location.)
Yes. Go to step 8.
No. The split-bus module has failed. Replace the split-bus module (see " Removing and Installing a Split-Bus Module ").
8. Are the pins on the SCSI cable damaged or is the cable between the host and the storage system disconnected?
No. Go to step 9.
Yes. Secure or replace the cable.
9. Replace the SCSI backplane board. See " Replacing the SCSI Backplane ."
Troubleshooting a Cooling Module
The cooling-module LED fault indicators are located in the upper-right corner of each power supply (see Figure 8 ). If a blower
fault indicator is illuminated or your array management software issues a blower-related error message, replace the cooling
module (see " Replacing a Cooling Module ").
CAUTION: A power supply and cooling module can be removed from a powered-on system for a maximum
period of five minutes. Beyond that time, the system begins to overheat, and at a critical temperature, shuts