DiskInfo

Info

DiskInfo is an interface representing physical disk drive information returned by getDiskInfo(). Each entry corresponds to one physical disk (HDD, SSD, NVMe), populated from the WMI class Win32_DiskDrive.

Signature

interface DiskInfo {
  model: string | null;
  manufacturer: string | null;
  sizeBytes: number | null;
  mediaType: string | null;
  interfaceType: string | null;
  partitions: number | null;
  serialNumber: string | null;
  status: string | null;
}

Properties

Property	Type	Description
model	string | null	Disk model name (e.g., "Samsung SSD 9100 PRO 2TB")
manufacturer	string | null	Manufacturer string from WMI
sizeBytes	number | null	Total disk size in bytes
mediaType	string | null	Media type (e.g., "Fixed hard disk media")
interfaceType	string | null	Interface type (e.g., "SCSI", "USB")
partitions	number | null	Number of partitions on the disk
serialNumber	string | null	Disk serial number
status	string | null	Device status (e.g., "OK")

Note

NVMe drives typically report interfaceType as "SCSI" because Windows routes them through the SCSI subsystem. Use the model string to identify NVMe drives specifically.

Tips

To display human-readable sizes, convert sizeBytes: (sizeBytes / 1099511627776).toFixed(1) + ' TB' for terabytes or (sizeBytes / 1073741824).toFixed(0) + ' GB' for gigabytes.

Example

TypeScript

import { getDiskInfo, DiskInfo } from '@eisland/windows-hardware-info-helper';

const disks: DiskInfo[] = getDiskInfo();
for (const disk of disks) {
  const sizeGB = disk.sizeBytes ? (disk.sizeBytes / 1073741824).toFixed(0) : '?';
  console.log(`${disk.model} — ${sizeGB} GB`);
  console.log(`  Interface: ${disk.interfaceType}, Partitions: ${disk.partitions}`);
}

JavaScript

const { getDiskInfo } = require('@eisland/windows-hardware-info-helper');

const disks = getDiskInfo();
for (const disk of disks) {
  const sizeGB = disk.sizeBytes ? (disk.sizeBytes / 1073741824).toFixed(0) : '?';
  console.log(`${disk.model} — ${sizeGB} GB`);
  console.log(`  Interface: ${disk.interfaceType}, Partitions: ${disk.partitions}`);
}

Warning

This returns physical disk drives, not logical volumes. A single physical disk may contain multiple partitions/drives (C:, D:, etc.). Use partitions to see how many.