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# 19.2 Device Names

The following is a list of physical storage devices supported in FreeBSD, and the device names associated with them.

Table 19-1. Physical Disk Naming Conventions

Drive type | Drive device name
--- | ---
IDE hard drives | `ad`
IDE CDROM drives | `acd`
SCSI hard drives and USB Mass storage devices | `da`
SCSI CDROM drives | `cd`
Assorted non-standard CDROM drives | `mcd` for Mitsumi CD-ROM and `scd` for Sony CD-ROM devices
Floppy drives | `fd`
SCSI tape drives | `sa`
IDE tape drives | `ast`
Flash drives | `fla` for DiskOnChip® Flash device
RAID drives | `aacd` for Adaptec® AdvancedRAID, `mlxd` and `mlyd` for Mylex®, `amrd` for AMI MegaRAID®, `idad` for Compaq Smart RAID, `twed` for 3ware® RAID.

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