---
title: DiskMountOption enum | Wartiva GraphQL API
description: File system mount options. Values cover both Linux fstab/mount options and macOS mount flags. Wartiva GraphQL API reference with arguments, fields, and examples.
url: https://wartiva.com/api-docs/types/disk-mount-option.html
updated: 2026-10-07
---

Endpoint configuration · GraphQL enum

# `DiskMountOption` enum

File system mount options. Values cover both Linux fstab/mount options and macOS mount flags. Reference (Linux): [mount(8) — Linux man page](https://man7.org/linux/man-pages/man8/mount.8.html) Reference (macOS): [mount(8) — Apple man page](https://www.unix.com/man-page/osx/8/mount/)

## Values

| Enum Value | Description |
|---|---|
| `READ_WRITE` | Mount read-write. |
| `READ_ONLY` | Mount read-only. |
| `SYNCHRONOUS` | All writes are synchronous (macOS flag name; see also SYNC). |
| `NO_EXEC` | Disallow program execution. |
| `NO_SUID` | Ignore setuid bits. |
| `UNION` | Union with underlying file system (macOS). |
| `ASYNC` | All writes are asynchronous. |
| `DONT_BROWSE` | Do not show in Finder (macOS). |
| `AUTO_MOUNTED` | Filesystem was mounted automatically (macOS). |
| `JOURNALED` | Filesystem is journaled (macOS HFS+). |
| `MULTI_LABEL` | Mandatory access control multi-label (macOS). |
| `NO_ATIME` | Do not update inode access times. |
| `NO_DEV` | Disallow device file access. |
| `COMPRESS` | Enable filesystem-level compression (btrfs, APFS). |
| `ATIME` | Update inode access times. |
| `NOATIME` | Do not update inode access times. |
| `AUTO` | Allow automatic mounting (Linux fstab). |
| `NOAUTO` | Disable automatic mounting (Linux fstab). |
| `CONTEXT` | Apply SELinux context label (Linux). |
| `FSCONTEXT` | Apply SELinux filesystem context label (Linux). |
| `DEFCONTEXT` | Apply SELinux default context label (Linux). |
| `ROOTCONTEXT` | Apply SELinux root context label (Linux). |
| `DEFAULTS` | Use kernel default mount options (Linux fstab). |
| `DEV` | Allow device file access (Linux). |
| `NODEV` | Disallow device file access. |
| `DIRATIME` | Update directory access times (Linux). |
| `NODIRATIME` | Do not update directory access times (Linux). |
| `DIRSYNC` | Synchronize directory updates (Linux). |
| `EXEC` | Allow program execution (Linux). |
| `NOEXEC` | Disallow program execution. |
| `GROUP` | Allow group members to mount (Linux fstab). |
| `IVERSION` | Enable inode version tracking (Linux). |
| `NOIVERSION` | Disable inode version tracking (Linux). |
| `MAND` | Enable mandatory locking (Linux). |
| `NOMAND` | Disable mandatory locking (Linux). |
| `NETDEV` | Network filesystem device (Linux fstab). |
| `NOFAIL` | Do not fail boot if mount fails (Linux fstab). |
| `RELATIME` | Update atime only on reads (less frequently) (Linux). |
| `NORELATIME` | Disable relatime behavior (Linux). |
| `STRICTATIME` | Always update access times (Linux). |
| `NOSTRICTATIME` | Do not always update access times (Linux). |
| `LAZYTIME` | Delay writing to disk; batch atime updates (Linux). |
| `NOLAZYTIME` | Disable lazytime behavior (Linux). |
| `SUID` | Honor setuid bits (Linux). |
| `NOSUID` | Ignore setuid bits. |
| `SILENT` | Suppress certain kernel warning messages (Linux). |
| `LOUD` | Enable kernel warning messages (Linux). |
| `OWNER` | Allow the device owner to mount (Linux fstab). |
| `REMOUNT` | Remount an already-mounted filesystem (Linux). |
| `RO` | Mount read-only. |
| `RW` | Mount read-write. |
| `SYNC` | All I/O is synchronous. |
| `USER` | Allow unprivileged user to mount (Linux fstab). |
| `NOUSER` | Disallow unprivileged user to mount (Linux fstab). |
| `USERS` | Allow any user to mount (Linux fstab). |
| `NOSYMFOLLOW` | Disallow following symbolic links (Linux, macOS). |
| `X_MOUNT_AUTO_FSTYPES` | Automatically determine filesystem types (Linux fstab x-mount extension). |
| `X_MOUNT_NOCANONICALIZE` | Do not canonicalize paths (Linux fstab x-mount extension). |
| `X_MOUNT_NOLOOP` | Disable loop device auto-detection (Linux fstab x-mount extension). |
| `X_MOUNT_SUBDIR` | Mount a specific subdirectory (Linux fstab x-mount extension). |
| `X_MOUNT_OWNER` | Override mount owner UID (Linux fstab x-mount extension). |
| `X_MOUNT_GROUP` | Override mount group GID (Linux fstab x-mount extension). |
| `X_MOUNT_MODE` | Override mount permission mode (Linux fstab x-mount extension). |
| `X_MOUNT_IDMAP` | Apply ID-mapped mount (Linux fstab x-mount extension). |
| `X_MOUNT_MKDIR` | Create mountpoint directory if missing (Linux fstab x-mount extension). |
| `UID` | FAT/VFAT: set uid for all files. |
| `GID` | FAT/VFAT: set gid for all files. |
| `OWNMASK` | FAT/VFAT: permissions mask for files owned by uid. |
| `OTHMASK` | FAT/VFAT: permissions mask for files owned by others. |
| `SETUID` | FAT/VFAT: allow setuid execution. |
| `SETGID` | FAT/VFAT: allow setgid execution. |
| `MODE` | FAT/VFAT: permission mode for files. |
| `PROTECT` | HFS+: protect root directory (macOS). |
| `USEMP` | HFS+: use mount point from superblock. |
| `VERBOSE` | Enable verbose output during mount. |
| `PREFIX` | FAT: filesystem volume prefix. |
| `VOLUME` | FAT/NTFS: volume label. |
| `RESERVED` | Reserved mount option. |
| `ROOT` | Root filesystem mount option. |
| `BS` | FAT: block size. |
| `GRPQUOTA` | Enable group disk quotas. |
| `NOQUOTA` | Disable all disk quotas. |
| `QUOTA` | Enable disk quotas. |
| `USRQUOTA` | Enable user disk quotas. |
| `NEWINSTANCE` | devpts: create a new private instance. |
| `PTMXMODE` | devpts: mode for the ptmx device file. |
| `UMASK` | FAT/VFAT: overall permission umask. |
| `DMASK` | FAT/VFAT: umask applied to directories. |
| `FMASK` | FAT/VFAT: umask applied to files. |
| `ALLOW_UTIME` | FAT: allow updating timestamps for user-owned files. |
| `CHECK` | FAT: check file system consistency on mount. |
| `CODEPAGE` | FAT: codepage for short filename conversion. |
| `CONV` | FAT: convert line endings (text conversion mode). |
| `CVF_FORMAT` | FAT/UMSDOS: CVF format driver name. |
| `CVF_OPTION` | FAT/UMSDOS: CVF format options. |
| `DEBUG` | Enable debug output for filesystem. |
| `DISCARD` | Enable TRIM/discard for SSD-friendly block reclaim. |
| `DOS1XFLOPPY` | FAT: emulate DOS 1.x floppy drive behavior. |
| `ERRORS` | FAT: error handling behavior (continue, remount-ro, panic). |
| `FAT` | FAT: FAT type (12, 16, or 32). |
| `NFS` | NFS-specific mount option. |
| `TZ` | FAT: timezone offset. |
| `TIME_OFFSET` | FAT: time offset in seconds from UTC. |
| `QUIET` | FAT: suppress some messages. |
| `RODIR` | FAT: make root directory read-only. |
| `SHOWEXEC` | FAT: only show executable files. |
| `SYS_IMMUTABLE` | UFS: immutable flag for system files. |
| `FLUSH` | FAT/VFAT: flush write operations frequently. |
| `USEFREE` | FAT: use free cluster count from boot sector. |
| `DOTS` | FAT: use dot and dot-dot entries. |
| `NODOTS` | FAT: do not use dot and dot-dot entries. |
| `DOTSOK` | FAT: allow dot files. |
| `POSIX` | ISO 9660: use POSIX permissions. |
| `NONUMTAIL` | FAT/VFAT: do not use numeric tail for 8.3 filenames. |
| `UTF8` | FAT/VFAT: use UTF-8 encoding. |
| `SHORTNAME` | FAT/VFAT: short file name conversion mode. |
| `CREATOR` | HFS: creator type for new files. |
| `TYPE` | HFS: file type for new files. |
| `DIR_UMASK` | FAT/VFAT: umask for directories. |
| `FILE_UMASK` | FAT/VFAT: umask for files. |
| `SESSION` | HFS: session number for multi-session CDROMs. |
| `PART` | HFS: partition number. |
| `CASE` | FAT: case sensitivity. |
| `NOCHECK` | ISO 9660: skip filesystem consistency check. |
| `NOROCK` | ISO 9660: ignore Rock Ridge extensions. |
| `NOJOLIET` | ISO 9660: ignore Joliet extensions. |
| `MAP` | ISO 9660: map non-compliant filenames. |
| `UNHIDE` | ISO 9660: show hidden files. |
| `BLOCK` | ISO 9660: block size. |
| `CRUFT` | ISO 9660: ignore file size discrepancies. |
| `SBSECTOR` | ISO 9660: sector block size offset for the filesystem. |
| `UNDELETE` | UFS: enable undelete support. |
| `ADINICB` | UDF: store data in ICB (in-core block). |
| `NOADINICB` | UDF: do not store data in ICB. |
| `SHORTAD` | UDF: use short allocation descriptors. |
| `LONGAD` | UDF: use long allocation descriptors. |
| `NOSTRICT` | UDF: disable strict compliance mode. |
| `IOCHARSET` | Charset for filename encoding (e.g. iso8859-1). |
| `RESIZE` | Resize the filesystem. |
| `NOINTEGRITY` | NTFS: disable journal integrity checking. |
| `INTEGRITY` | NTFS: enable journal integrity checking. |
| `NLS` | NLS national language support charset. |
| `UNI_XLATE` | Translate unicode to Latin-1 (VFAT). |
| `LOWERDIR` | OverlayFS: lower directory layers. |
| `UPPERDIR` | OverlayFS: upper (writable) directory. |
| `WORKDIR` | OverlayFS: work directory for overlay operations. |
| `USERXATTR` | Enable user-space extended attributes. |
| `REDIRECT_DIR` | ReiserFS: enable directory redirect. |
| `INDEX` | ReiserFS: enable directory index (htree). |
| `UUID` | Filesystem UUID. |
| `NFS_EXPORT` | Enable NFS re-export of the filesystem. |
| `XINO` | ReiserFS: inode number extender. |
| `METACOPY` | OverlayFS: enable metadata-only copy-up. |
| `VOLATILE` | Btrfs: allow unsafe metadata writes (volatile). |
| `HASH` | Btrfs: hash algorithm for checksums. |
| `HASHED_RELOCATION` | Btrfs: enable hashed relocation. |
| `NO_UNHASHED_RELOCATION` | Btrfs: disable unhashed relocation. |
| `NOBORDER` | ReiserFS: disable border flushing heuristic. |
| `NOLOG` | ReiserFS: disable journaling. |
| `NOTAIL` | ReiserFS: disable file tailing packing. |
| `REPLAYONLY` | ReiserFS: replay journal only, do not mount. |
| `USER_XATTR` | Enable user-extended attributes. |
| `ACL` | Enable POSIX access control lists. |
| `BARRIER` | Enable write barrier for journaling filesystems. |
| `BULK_READ` | UBIFS: enable bulk read optimization. |
| `NO_BULK_READ` | UBIFS: disable bulk read optimization. |
| `CHK_DATA_CRC` | UBIFS: enable data CRC checking. |
| `NO_CHK_DATA_CRC` | UBIFS: disable data CRC checking. |
| `COMPR` | Enable transparent filesystem compression. |
| `UFSTYPE` | UFS: filesystem type variant. |
| `ONERROR` | UFS: error recovery behavior (panic, lock, umount, repair). |
| `DEVUID` | USB: default uid for device files. |
| `DEVGID` | USB: default gid for device files. |
| `DEVMODE` | USB: default mode for device files. |
| `BUSUID` | USB: default uid for bus files. |
| `BUSGID` | USB: default gid for bus files. |
| `BUSMODE` | USB: default mode for bus files. |
| `LISTUID` | USB: default uid for list files. |
| `LISTGID` | USB: default gid for list files. |
| `LISTMODE` | USB: default mode for list files. |
| `VERITY_HASHDEVICE` | dm-verity: hash device for integrity verification. |
| `VERITY_ROOTHASH` | dm-verity: root hash of the hash tree. |
| `VERITY_ROOTHASHFILE` | dm-verity: file containing the root hash. |
| `VERITY_HASHOFFSET` | dm-verity: offset of the hash tree in the hash device. |
| `VERITY_FECDEVICE` | dm-verity: Forward Error Correction (FEC) device. |
| `VERITY_FECOFFSET` | dm-verity: offset of FEC data in the FEC device. |
| `VERITY_FECROOTS` | dm-verity: number of FEC parity bytes. |
| `VERITY_ROOTHASHSIG` | dm-verity: signature file for the root hash. |
| `VERITY_ONCORRUPTION` | dm-verity: action on corruption (ignore, restart, panic). |
| `LOOP` | Mount image file via loop device. |
| `OFFSET` | Byte offset into the image file for loop mount. |
| `SIZELIMIT` | Size limit for loop mount. |

## Used by

- [`DiskMount`](https://wartiva.com/api-docs/types/disk-mount.html) type: A file system mounted on an Endpoint, identified by its device and mount point (for example C: on Windows or / on Linux and macOS).

## Example

### Example

```json
"READ_WRITE"

```

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