diff --git a/server/handlers/fstab/analyzer/analyzer.go b/server/handlers/fstab/analyzer/analyzer.go
index 465ead5..b6b08a6 100644
--- a/server/handlers/fstab/analyzer/analyzer.go
+++ b/server/handlers/fstab/analyzer/analyzer.go
@@ -14,17 +14,23 @@ type analyzerContext struct {
 func Analyze(
 	document *shared.FstabDocument,
 ) []protocol.Diagnostic {
-	ctx := analyzerContext{
+	ctx := &analyzerContext{
 		document: document,
 	}
 
-	analyzeFieldAreFilled(&ctx)
+	analyzeFieldAreFilled(ctx)
 
 	if len(ctx.diagnostics) > 0 {
 		return ctx.diagnostics
 	}
 
-	analyzeValuesAreValid(&ctx)
+	analyzeValuesAreValid(ctx)
+
+	if len(ctx.diagnostics) > 0 {
+		return ctx.diagnostics
+	}
+
+	analyzePassFields(ctx)
 
 	return ctx.diagnostics
 }
diff --git a/server/handlers/fstab/analyzer/pass.go b/server/handlers/fstab/analyzer/pass.go
new file mode 100644
index 0000000..33b1174
--- /dev/null
+++ b/server/handlers/fstab/analyzer/pass.go
@@ -0,0 +1,48 @@
+package analyzer
+
+import (
+	"config-lsp/common"
+	"config-lsp/handlers/fstab/ast"
+	"fmt"
+	"strings"
+
+	protocol "github.com/tliron/glsp/protocol_3_16"
+)
+
+func analyzePassFields(ctx *analyzerContext) {
+	it := ctx.document.Config.Entries.Iterator()
+
+	var rootEntry *ast.FstabEntry
+
+	for it.Next() {
+		entry := it.Value().(*ast.FstabEntry)
+
+		if entry.Fields != nil && entry.Fields.Pass != nil && entry.Fields.Pass.Value.Value == "1" {
+			fileSystem := strings.ToLower(entry.Fields.FilesystemType.Value.Value)
+
+			if fileSystem == "btrfs" || fileSystem == "xfs" {
+				// From https://wiki.archlinux.org/title/Fstab
+
+				ctx.diagnostics = append(ctx.diagnostics, protocol.Diagnostic{
+					Range:    entry.Fields.Pass.ToLSPRange(),
+					Message:  "If the root file system is btrfs or XFS, the fsck order should be set to 0 instead of 1. See fsck.btrfs(8) and fsck.xfs(8).",
+					Severity: &common.SeverityWarning,
+				})
+
+				continue
+			}
+
+			if entry.Fields.Pass.Value.Value == "1" {
+				if rootEntry != nil {
+					ctx.diagnostics = append(ctx.diagnostics, protocol.Diagnostic{
+						Range:    entry.Fields.Pass.ToLSPRange(),
+						Message:  fmt.Sprintf("Only the root file system should have a fsck of 1. Other file systems should have a fsck of 2 or 0. The root file system is already using a fsck=1 on line %d", rootEntry.Fields.Start.Line),
+						Severity: &common.SeverityWarning,
+					})
+				} else {
+					rootEntry = entry
+				}
+			}
+		}
+	}
+}
diff --git a/server/handlers/fstab/analyzer/pass_test.go b/server/handlers/fstab/analyzer/pass_test.go
new file mode 100644
index 0000000..74ef781
--- /dev/null
+++ b/server/handlers/fstab/analyzer/pass_test.go
@@ -0,0 +1,44 @@
+package analyzer
+
+import (
+	testutils_test "config-lsp/handlers/fstab/test_utils"
+	"testing"
+)
+
+func TestFSCKMultipleRoots(
+	t *testing.T,
+) {
+	document := testutils_test.DocumentFromInput(t, `
+UUID=12345678-1234-1234-1234-123456789012 /boot ext4 defaults 0 1
+UUID=12345678-1234-1234-1234-123456789012 / btrfs defaults 0 1
+UUID=12345678-1234-1234-1234-123456789012 /home ext4 defaults 0 2
+`)
+
+	ctx := &analyzerContext{
+		document: document,
+	}
+
+	analyzePassFields(ctx)
+
+	if len(ctx.diagnostics) != 1 {
+		t.Errorf("Expected 1 error, got %v", len(ctx.diagnostics))
+	}
+}
+
+func TestFSCKBtrfsUsingRoot(
+	t *testing.T,
+) {
+	document := testutils_test.DocumentFromInput(t, `
+UUID=12345678-1234-1234-1234-123456789012 /boot btrfs defaults 0 1
+`)
+
+	ctx := &analyzerContext{
+		document: document,
+	}
+
+	analyzePassFields(ctx)
+
+	if len(ctx.diagnostics) != 1 {
+		t.Errorf("Expected 1 error, got %v", len(ctx.diagnostics))
+	}
+}
diff --git a/server/handlers/fstab/fields/pass.go b/server/handlers/fstab/fields/pass.go
index 5306a11..8c61709 100644
--- a/server/handlers/fstab/fields/pass.go
+++ b/server/handlers/fstab/fields/pass.go
@@ -2,25 +2,20 @@ package fields
 
 import docvalues "config-lsp/doc-values"
 
-var PassField = docvalues.OrValue{
-	Values: []docvalues.DeprecatedValue{
-		docvalues.EnumValue{
-			EnforceValues: false,
-			Values: []docvalues.EnumString{
-				docvalues.CreateEnumStringWithDoc(
-					"0",
-					"Defaults to zero (don’t check the filesystem) if not present.",
-				),
-				docvalues.CreateEnumStringWithDoc(
-					"1",
-					"The root filesystem should be specified with a fs_passno of 1.",
-				),
-				docvalues.CreateEnumStringWithDoc(
-					"2",
-					"Other filesystems [than the root filesystem] should have a fs_passno of 2.",
-				),
-			},
-		},
-		docvalues.NumberValue{},
+var PassField = docvalues.EnumValue{
+	EnforceValues: false,
+	Values: []docvalues.EnumString{
+		docvalues.CreateEnumStringWithDoc(
+			"0",
+			"Defaults to zero (don’t check the filesystem) if not present.",
+		),
+		docvalues.CreateEnumStringWithDoc(
+			"1",
+			"The root filesystem should be specified with a fs_passno of 1.",
+		),
+		docvalues.CreateEnumStringWithDoc(
+			"2",
+			"Other filesystems [than the root filesystem] should have a fs_passno of 2.",
+		),
 	},
 }