From d2f240c791c757bbad2b4c22fc4eee87912f8d77 Mon Sep 17 00:00:00 2001
From: Harshavardhana <harsha@minio.io>
Date: Fri, 2 Nov 2018 11:31:55 -0700
Subject: [PATCH] Ignore windows hidden folders (#6735)

On Windows erasure coding setup if

```
~ minio server V:\ W:\ X:\ Z:\
```

is not possible due to NTFS creating couple of
hidden folders, this PR allows minio to use
the entire drive.
---
 cmd/format-xl.go | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/cmd/format-xl.go b/cmd/format-xl.go
index e4d6c60e7..68da846ed 100644
--- a/cmd/format-xl.go
+++ b/cmd/format-xl.go
@@ -379,6 +379,22 @@ func saveFormatXL(disk StorageAPI, format interface{}) error {
 	return disk.RenameFile(minioMetaBucket, formatConfigFileTmp, minioMetaBucket, formatConfigFile)
 }
 
+var ignoredHiddenDirectories = []string{
+	minioMetaBucket,
+	"lost+found",
+	"$RECYCLE.BIN",
+	"System Volume Information",
+}
+
+func isIgnoreHiddenDirectories(dir string) bool {
+	for _, ignDir := range ignoredHiddenDirectories {
+		if dir == ignDir {
+			return true
+		}
+	}
+	return false
+}
+
 // loadFormatXL - loads format.json from disk.
 func loadFormatXL(disk StorageAPI) (format *formatXLV3, err error) {
 	buf, err := disk.ReadAll(minioMetaBucket, formatConfigFile)
@@ -391,9 +407,7 @@ func loadFormatXL(disk StorageAPI) (format *formatXLV3, err error) {
 			if err != nil {
 				return nil, err
 			}
-			if len(vols) > 1 || (len(vols) == 1 &&
-				vols[0].Name != minioMetaBucket &&
-				vols[0].Name != "lost+found") {
+			if len(vols) > 1 || (len(vols) == 1 && !isIgnoreHiddenDirectories(vols[0].Name)) {
 				// 'format.json' not found, but we
 				// found user data.
 				return nil, errCorruptedFormat