SK0-005 · Question #393
A technician needs to replace two RAID controllers on a database server as part of an upgrade. The server has six external storage arrays and eight internal disks that are controlled by the two RAID…
The correct answer is D. Turn off all components and confirm all external and internal cables before rebooting. After replacing RAID controllers and encountering missing disks, the first and most fundamental step is to power down all components and meticulously check all physical cabling to ensure proper connections.
Question
A technician needs to replace two RAID controllers on a database server as part of an upgrade. The server has six external storage arrays and eight internal disks that are controlled by the two RAID controllers. The technician completes the replacement and powers the systems back on, but the server OS detects several missing disks in the configuration. Which of the following steps should the technician take first to resolve this issue?
Options
- AReboot to the RAID controller BIOS and rescan for attached disks and arrays.
- BStart the motherboard UEFI and confirm the RAID controller start order is correct.
- CTurn off the external arrays and reboot the server to redetect the internal disks first.
- DTurn off all components and confirm all external and internal cables before rebooting.
How the community answered
(35 responses)- A11% (4)
- B3% (1)
- C3% (1)
- D83% (29)
Why each option
After replacing RAID controllers and encountering missing disks, the first and most fundamental step is to power down all components and meticulously check all physical cabling to ensure proper connections.
While rescanning for disks in the RAID controller BIOS might be necessary, it's typically done after verifying physical connections, as a rescan won't help if cables are improperly attached.
The motherboard UEFI's boot order typically refers to which device the system attempts to boot from, not the detection order of disks by RAID controllers.
Turning off external arrays and rebooting to redetect internal disks first is an arbitrary troubleshooting step and does not address the fundamental possibility of incorrect or loose cabling after a hardware replacement.
When components like RAID controllers are replaced, especially with multiple internal and external storage arrays, it is critical to ensure all cables (data, power, and SAS/SATA connections) are securely reconnected. Loose or improperly connected cables are a very common cause of disks or arrays not being detected by the new controllers, making this the essential first troubleshooting step.
Concept tested: Physical cabling verification after hardware replacement
Source: https://www.broadcom.com/support/knowledgebase/1211166300405/troubleshooting-raid-and-disk-issues
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