diff --git a/src/api2/node/disks.rs b/src/api2/node/disks.rs
index b65b4d96..6ea97abe 100644
--- a/src/api2/node/disks.rs
+++ b/src/api2/node/disks.rs
@@ -11,7 +11,7 @@ use crate::tools::disks::{
     get_disks, get_smart_data,
 };
 
-use crate::api2::types::NODE_SCHEMA;
+use crate::api2::types::{NODE_SCHEMA, BLOCKDEVICE_NAME_SCHEMA};
 
 #[api(
     protected: true,
@@ -72,8 +72,7 @@ pub fn list_disks(
                 schema: NODE_SCHEMA,
             },
             disk: {
-		description: "Block device name.",
-		type: String,
+                schema: BLOCKDEVICE_NAME_SCHEMA,
             },
             healthonly: {
                 description: "If true returns only the health status.",
diff --git a/src/api2/types.rs b/src/api2/types.rs
index e613714b..bcf95e87 100644
--- a/src/api2/types.rs
+++ b/src/api2/types.rs
@@ -74,6 +74,8 @@ const_regex!{
     pub CERT_FINGERPRINT_SHA256_REGEX = r"^(?:[0-9a-fA-F][0-9a-fA-F])(?::[0-9a-fA-F][0-9a-fA-F]){31}$";
 
     pub ACL_PATH_REGEX = concat!(r"^(?:/|", r"(?:/", PROXMOX_SAFE_ID_REGEX_STR!(), ")+", r")$");
+
+    pub BLOCKDEVICE_NAME_REGEX = r"^(:?(:?h|s|x?v)d[a-z]+)|(:?nvme\d+n\d+)$";
 }
 
 pub const SYSTEMD_DATETIME_FORMAT: ApiStringFormat =
@@ -133,6 +135,8 @@ pub const CIDR_V6_FORMAT: ApiStringFormat =
 pub const CIDR_FORMAT: ApiStringFormat =
     ApiStringFormat::Pattern(&CIDR_REGEX);
 
+pub const BLOCKDEVICE_NAME_FORMAT: ApiStringFormat =
+    ApiStringFormat::Pattern(&BLOCKDEVICE_NAME_REGEX);
 
 pub const PASSWORD_SCHEMA: Schema = StringSchema::new("Password.")
     .format(&PASSWORD_FORMAT)
@@ -353,6 +357,11 @@ pub const PROXMOX_GROUP_ID_SCHEMA: Schema = StringSchema::new("Group ID")
     .max_length(64)
     .schema();
 
+pub const BLOCKDEVICE_NAME_SCHEMA: Schema = StringSchema::new("Block device name (/sys/block/<name>).")
+    .format(&BLOCKDEVICE_NAME_FORMAT)
+    .min_length(3)
+    .max_length(64)
+    .schema();
 
 // Complex type definitions
 
diff --git a/src/bin/proxmox_backup_manager/disk.rs b/src/bin/proxmox_backup_manager/disk.rs
index 83a1e236..86338bd3 100644
--- a/src/bin/proxmox_backup_manager/disk.rs
+++ b/src/bin/proxmox_backup_manager/disk.rs
@@ -48,8 +48,7 @@ fn list_disks(mut param: Value, rpcenv: &mut dyn RpcEnvironment) -> Result<Value
     input: {
         properties: {
             disk: {
-		description: "Block device name.",
-		type: String,
+                schema: BLOCKDEVICE_NAME_SCHEMA,
             },
             "output-format": {
                 schema: OUTPUT_FORMAT,
diff --git a/src/tools/disks.rs b/src/tools/disks.rs
index 276e6fc7..f8c90435 100644
--- a/src/tools/disks.rs
+++ b/src/tools/disks.rs
@@ -19,6 +19,8 @@ use proxmox::sys::linux::procfs::{MountInfo, mountinfo::Device};
 use proxmox::{io_bail, io_format_err};
 use proxmox::api::api;
 
+use crate::api2::types::BLOCKDEVICE_NAME_REGEX;
+
 mod zfs;
 pub use zfs::*;
 mod lvm;
@@ -29,8 +31,6 @@ pub use smart::*;
 lazy_static::lazy_static!{
     static ref ISCSI_PATH_REGEX: regex::Regex =
         regex::Regex::new(r"host[^/]*/session[^/]*").unwrap();
-    static ref BLOCKDEV_REGEX: regex::Regex =
-        regex::Regex::new(r"^(:?(:?h|s|x?v)d[a-z]+)|(:?nvme\d+n\d+)$").unwrap();
 }
 
 bitflags! {
@@ -727,7 +727,7 @@ pub fn get_disks(
 
     let mut result = HashMap::new();
 
-    for item in crate::tools::fs::scan_subdir(libc::AT_FDCWD, "/sys/block", &BLOCKDEV_REGEX)? {
+    for item in crate::tools::fs::scan_subdir(libc::AT_FDCWD, "/sys/block", &BLOCKDEVICE_NAME_REGEX)? {
         let item = item?;
 
         let name = item.file_name().to_str().unwrap().to_string();
@@ -823,7 +823,7 @@ pub fn get_disks(
 pub fn complete_disk_name(_arg: &str, _param: &HashMap<String, String>) -> Vec<String> {
     let mut list = Vec::new();
 
-    let dir = match crate::tools::fs::scan_subdir(libc::AT_FDCWD, "/sys/block", &BLOCKDEV_REGEX) {
+    let dir = match crate::tools::fs::scan_subdir(libc::AT_FDCWD, "/sys/block", &BLOCKDEVICE_NAME_REGEX) {
         Ok(dir) => dir,
         Err(_) => return list,
     };