SG0-001 · Question #134
A new LUN is added to a mission critical host from the storage array on which the host is currently already accessing 2 LUNS; which of the following is the FIRST step required to utilize the new LUN?
The correct answer is B. Initiate a rescan from the host.. When a new LUN is added to a host that is already accessing other LUNs from the same storage array, the host needs to perform a rescan to detect and make the new LUN available.
Question
A new LUN is added to a mission critical host from the storage array on which the host is currently already accessing 2 LUNS; which of the following is the FIRST step required to utilize the new LUN?
Options
- AChange the zoning to allow the host to see the new LUN.
- BInitiate a rescan from the host.
- CInitiate a Name Server update.
- DReboot the host.
How the community answered
(17 responses)- A6% (1)
- B82% (14)
- C12% (2)
Why each option
When a new LUN is added to a host that is already accessing other LUNs from the same storage array, the host needs to perform a rescan to detect and make the new LUN available.
Changing the zoning is typically only necessary if the host cannot see the storage array or the specific target at all, which is not the case if it's already accessing other LUNs from the same array.
Initiating a rescan from the host's operating system or HBA utility forces the host to rediscover its connected storage devices. This action allows the host to detect and recognize the newly presented LUN without requiring a full system reboot or changes to the existing storage zoning.
Concept tested: LUN discovery and provisioning
Source: https://learn.microsoft.com/en-us/windows-server/storage/disk-management/change-a-drive-letter-path#rescan-disks
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