TrueNAS Documentation Archive
This content follows TrueNAS 24.10 (Electric Eel) releases. Archival documentation is provided for reference only and not actively maintained.
Use the Product and Version selectors above to view content specific to different TrueNAS software or major versions.
SLOG Over-Provisioning
1 minute read.
TrueNAS Enterprise
Over-provisioning an SSD distributes the total number of writes and erases across more flash blocks on the drive. Seagate provides a thoughtful investigation into over-provisioning SSDs here: https://www.seagate.com/blog/ssd-over-provisioning-benefits-master-ti/.
For more general information on SLOG disks, see SLOG Devices.
Because this is a potentially disruptive procedure, contact iXsystems Support to review your overprovisioning needs and schedule a maintenance window.
Customers who purchase iXsystems hardware or that want additional support must have a support contract to use iXsystems Support Services. The TrueNAS Community forums provides free support for users without an iXsystems Support contract.
iXsystems Customer Support Support Portal https://support.ixsystems.com support@ixsystems.com Telephone and Other Resources https://www.ixsystems.com/support/

