if you're speaking of Storage, you have to do a Capacity Planning before define Hard Disks requirements (see Splunk Capacity Planning).
If instead you're speaking of Splunk system hard disks requirements you can see Splunk Hardware requirements.
I cannot access Docs to search paths.
Hi, In splunk enterprise documentation, It is given like this we need 5 GB of Hard disk for Splunk Enterprise. In the same way ,I need hard disk space requirement for heavy forwarder. I am not able to find in documentation.
Platform Recommended hardware capacity/configuration
Non-Windows platforms 2x six-core, 2+ GHz CPU, 12GB RAM, Redundant Array of Independent Disks (RAID) 0 or 1+0, with a 64 bit OS installed.
Windows platforms 2x six-core, 2+ GHz CPU, 12GB RAM, RAID 0 or 1+0, with a 64-bit OS installed.
RAID 0 disk configurations do not provide fault-tolerance. Confirm that a RAID 0 configuration meets your data reliability needs before deploying a Splunk Enterprise indexer on a system configured with RAID 0.
Maintain a minimum of 5GB of free hard disk space on any Splunk Enterprise instance, including forwarders, in addition to the space required for any indexes. See Estimate your storage requirements in Capacity Planning for a procedure on how to estimate the space you need. Failure to maintain this level of free space can degrade performance and cause operating system failure and data loss.
Hi @Monica7, these related questions have some comments that might help:
What is your use case for HF? Probably you should be using UF. If you are using HF the correct way, then you will not need any special disk space requirements because nothing will be hitting disk and it all will be immediately forwarded to the Indexer Tier.