diglloydTools DiskTester

Spec sheet

Purpose

DiskTester tests drive performance and reliability for single volumes or RAID.Read 9 Oct 2026 · diglloydtools.com

Support

The maker directs users to the manual and accepts concise usage questions by email, while workflow advice is offered on a consulting basis.Read 9 Oct 2026 · diglloydtools.com

License

The diglloydTools suite is offered under a single-user license for one person on up to two computers; commercial or lab use requires one licensed copy per machine.Read 8 Oct 2026 · diglloydtools.com

Headquarters

3130 Alpine Rd #288-256, Portola Valley, CA 94028, United StatesRead 28 Sep 2026 · diglloydtools.com

Maker

The about page identifies Lloyd Chambers as founder and president of DIGLLOYD INC from 2007 to the present.Read 8 Oct 2026 · diglloyd.com

Bad block mapping

The fill-volume command fills a volume and reports performance, with the side effect of forcing bad blocks to be mapped out.Read 8 Oct 2026 · diglloydtools.com

Bad blocks

The fill-volume command fills a volume to capacity and reports performance, with the side effect of forcing bad blocks to be mapped out.Read 9 Oct 2026 · diglloydtools.com

Data safety

The maker says DiskTester operates at the file-system level as a normal user, does not use special permissions or kernel extensions, and writes only its own test files.Read 9 Oct 2026 · diglloydtools.com

File handling

The maker says DiskTester uses temporary test files and opens existing files read-only; it does not write over existing files.Read 8 Oct 2026 · diglloydtools.com

Graphing

DiskTester outputs text rather than drawing graphs; supplied spreadsheets can graph results for some commands.Read 9 Oct 2026 · diglloydtools.com

Interfaces

DiskTester supplies both a graphical interface and a command-line interface, with the latter offering control over test parameters.Read 9 Oct 2026 · diglloydtools.com

Internet use

The purchase page says the installed software works in perpetuity without restrictions and does not phone home or use the internet.Read 9 Oct 2026 · diglloydtools.com

Limitations

DiskTester can detect test failures but cannot diagnose or prevent underlying hardware failures, and a failing system may freeze or hang during testing.Read 8 Oct 2026 · diglloydtools.com

Other tests

Commands include sequential speed tests, reliability and data integrity tests, file reads, file creation, and volume information.Read 8 Oct 2026 · diglloydtools.com

Other uses

DiskTester can also test digital camera cards and network performance, and compare single-drive performance using SATA, FireWire, and USB.Read 9 Oct 2026 · diglloydtools.com

Performance tests

Its commands test sequential read and write speeds, throughput across multiple simultaneous streams, and performance across a volume.Read 9 Oct 2026 · diglloydtools.com

Purchase and license

The suite is sold under a single-user license for one person on up to two computers, while commercial or lab use requires one licensed copy per machine.Read 9 Oct 2026 · diglloydtools.com

Reliability

The test-reliability command writes to and verifies an entire volume or a portion of it.Read 9 Oct 2026 · diglloydtools.com

Risk limitation

The maker warns that intensive testing may freeze or crash a flaky system and recommends keeping backups.Read 9 Oct 2026 · diglloydtools.com

Security design

DiskTester operates as a normal user program at the file-system level and does not use special permissions, kernel extensions, or drivers.Read 8 Oct 2026 · diglloydtools.com

SSD reconditioning

The recondition command is described as restoring SSD performance.Read 9 Oct 2026 · diglloydtools.com

Supported OS

The product page lists macOS Mojave, Catalina, Big Sur, Monterey, and Ventura.Read 9 Oct 2026 · diglloydtools.com

Supported system

The product page lists macOS Mojave, Catalina, Big Sur, Monterey, and Ventura.Read 8 Oct 2026 · diglloydtools.com

Updates

Download privileges provide access to the current version during the purchased term, and downloaded versions continue to work without further fees.Read 9 Oct 2026 · diglloydtools.com

Use cases

The maker says DiskTester can test digital camera cards and network performance, and compare single-drive performance over SATA, FireWire, and USB.Read 8 Oct 2026 · diglloydtools.com

Video workloads

The run-streams command tests throughput with multiple simultaneous read and write streams to help assess video workloads.Read 8 Oct 2026 · diglloydtools.com

Where Specifiction places it

• Disk Benchmark Software#15 of 297.5