JAASAuthenticator orig = new JAASAuthenticator(new HashMap<String, String>(), "DOM", "user", "pass");

        // Provide a Subject in super to drive a specific LoginContext constructor branch
        Subject presetSubject = new Subject();
        orig.setSubject(presetSubject);

        // Try to get a Subject, but handle the case where JAAS may not be configured

		if serverDebugLog {
			fmt.Printf("Task in the queue: %#v\n", task)
		}
	case <-h.ctx.Done():
		return nil
	}

	countOKDrives := func(drives []madmin.HealDriveInfo) (count int) {
		for _, drive := range drives {
			if drive.State == madmin.DriveStateOk {
				count++
			}
		}
		return count
	}

	// task queued, now wait for the response.
	select {
	case res := <-task.respCh:
		if res.err == nil {

			storageLogOnceIf(context.Background(),
				fmt.Errorf("unexpected drive ordering on pool: %s: found drive at (set=%s, drive=%s), expected at (set=%s, drive=%s): %s(%s): %w",
					humanize.Ordinal(ep.PoolIdx+1), humanize.Ordinal(m+1), humanize.Ordinal(n+1), humanize.Ordinal(ep.SetIdx+1), humanize.Ordinal(ep.DiskIdx+1),
					s, s.diskID, errInconsistentDisk), "drive-order-format-json")
			return s, errInconsistentDisk
		}
		s.diskID = diskID

	}
	if formatV3.Erasure.This != m.Erasure.Disk {
		t.Fatalf("expected drive uuid: %s, got: %s", m.Erasure.Disk, formatV3.Erasure.This)
	}
	if len(formatV3.Erasure.Sets) != 1 {
		t.Fatalf("expected single set after migrating from v1 to v3, but found %d", len(formatV3.Erasure.Sets))
	}
	if !reflect.DeepEqual(formatV3.Erasure.Sets[0], m.Erasure.JBOD) {
		t.Fatalf("expected drive uuid: %v, got: %v", m.Erasure.JBOD, formatV3.Erasure.Sets[0])
	}

			if testCase.result != gotGCD {
				t.Errorf("Expected %v, got %v", testCase.result, gotGCD)
			}
		})
	}
}

// Test tests calculating set indexes with ENV override for drive count.
func TestGetSetIndexesEnvOverride(t *testing.T) {
	testCases := []struct {
		args        []string
		totalSizes  []uint64
		indexes     [][]uint64
		envOverride uint64
		success     bool
	}{
		{

a clear, valuable commit history for our open-source projects. They apply to all contributors, 
fostering efficient reviews and robust code.

## Why Pull Requests?

Pull Requests (PRs) drive quality in MinIO’s codebase by:
- Enabling peer review without pair programming.
- Documenting changes for future reference.
- Ensuring commits tell a clear story of development.

    /**
     * This method returns the free disk space in bytes of the drive this share
     * represents or the drive on which the directory or file resides. Objects
     * other than <code>TYPE_SHARE</code> or <code>TYPE_FILESYSTEM</code> will result
     * in 0L being returned.
     *
     * @return the free disk space in bytes of the drive on which this file or
     *         directory resides

		t.Fatalf("Unable to format drives for erasure, %s", err)
	}

	ep := PoolEndpoints{Endpoints: endpoints}

	parity, err := ecDrivesNoConfig(16)
	if err != nil {
		t.Fatalf("Unexpected error during EC drive config: %v", err)
	}
	if _, err := newErasureSets(ctx, ep, storageDisks, format, parity, 0); err != nil {
		t.Fatalf("Unable to initialize erasure")
	}
}

	// Trace only metrics:
	scannerMetricScanFolder      // Scan a folder on disk, recursively.
	scannerMetricScanCycle       // Full cycle, cluster global
	scannerMetricScanBucketDrive // Single bucket on one drive
	scannerMetricCompactFolder   // Folder compacted.

	// Must be last:
	scannerMetricLast
)

// log scanner action.
// Use for s > scannerMetricStartTrace

	Checksums  map[string]string `json:"crc,omitempty" msg:"crc,omitempty"`   // Content Checksums
	Error      string            `json:"error,omitempty" msg:"err,omitempty"` // only set while reading part meta from drive.
}

// ChecksumInfo - carries checksums of individual scattered parts per disk.
type ChecksumInfo struct {
	PartNumber int
	Algorithm  BitrotAlgorithm
	Hash       []byte
}