F5CAB1 Install, Initial Configuration, and Upgrade Practice Question
Exhibit
Error: [Errno 28] No space left on device /usr/bin/tmsh install sys software image BigIP-15.1.0.iso volume HD1.2
Refer to the exhibit. An administrator receives this error when attempting to install a new software version. What is the most appropriate remediation step?
⚠ Common exam trap
Candidates often suggest re-imaging the entire appliance. This is an excessive and destructive step; the correct approach is simply to free up existing disk space by removing old volumes.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Delete an old, unused software volume.
The 'No space left on device' error indicates the target boot location is full. The administrator must delete an unused software volume to reclaim space. Managing boot locations is a standard administrative task in BIG-IP environments, ensuring that at least one volume remains available for future upgrades or rollbacks, thereby maintaining system reliability during the transition to new software versions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Expand the virtual disk in the hypervisor.
Why it's wrong here
Hypervisor-level disk expansion does not automatically resize the existing LVM partitions within the BIG-IP file system. F5 partitions are pre-defined during installation, and simply increasing the virtual disk size will not resolve the specific 'No space left' error on an existing boot volume partition.
- ✓
Delete an old, unused software volume.
Why this is correct
BIG-IP systems maintain multiple boot locations to facilitate seamless upgrades. When a volume is full, the system cannot extract the new image files. Removing an obsolete or unused version frees up the necessary space for the new installation without requiring a full system re-image of the unit.
- ✗
Run 'touch' on the partition to clear logs.
Why it's wrong here
Clearing log files does not increase the space available for software volumes, which are separate partitions defined at installation. Software volumes are isolated from log directories, and the 'touch' command is irrelevant to managing disk space within the context of software image installation and partition management.
- ✗
Perform a 'factory reset' of the device.
Why it's wrong here
A factory reset is an extreme measure that destroys the current configuration and data. It is never the correct solution for a simple space limitation issue. Administering an F5 device requires surgical management of resources; destroying the configuration to gain space is an inefficient and potentially disruptive administrative practice.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official F5 exam blueprint
This F5CAB1 practice question is part of Courseiva's free F5 certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the F5CAB1 exam.