General term of the removablestorage unit whichis connectedto the computer itself with ATA /ATAPI.InsideCD drive andMOdrive and DVD drive etc.,it meansthe thingof those whichuse ATA / ATAPI for interface.Standard "ARMDBS" in orderin1997 to support ARMD with BIOS (ARMD BIOS Specification) was decided, reachedthe point whereit canstart OS from ARMD.Being able to startOSfromCD-ROMand DVD-ROMdependsonthe fact that BIOS corresponds to ARMDBS.Pointingto

the thing of ARMDBS, when it calls ARMD, it is.