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SLOG Over-Provisioning

  1 minute read.

Last Modified 2022-09-16 11:55 EDT

Over-provisioning SLOG SSDs is useful for different scenarios. The most useful benefit of over-provisioning is greatly extending SSD life. 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/tech-insights/ssd-over-provisioning-benefits-master-ti/.

Some SATA devices are limited to one resize per power cycle. Some BIOS can block resize during boot and require a live power cycle.

Over-Provision with Disk_Resize

SCALE uses the disk_resize command to change the size of a device. The SCALE UI does not have a UI function for this command yet.

Go to System Settings > Shell to enter the command and resize or over-provision a device.

disk_resize sda 32GB where sda is the device and 32GIB is the new size for the device.

When no size is specified, it reverts the provision back the full size of the device.

The disk_resize command supports SAS, SATA, SAT (interposer) and NVMe drives. Power cycle SATA drives before a second resize

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