Category: <b>DOS kernel</b>
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<pre><b>INT 21 - DOS 3.0+ - IOCTL - CHECK IF BLOCK DEVICE REMOVABLE</b>

	AX = 4408h
	BL = drive number (00h = default, 01h = A:, etc)
Return: CF clear if successful
	    AX = media type (0000h removable, 0001h fixed)
	CF set on error
	    AX = error code (01h,0Fh) (see <a href=../../it/80/16.html>#01680</a> at AH=59h/BX=0000h)
Notes:	in addition to the normal operation, if Stacker is installed, this
	  call also sets the volume number at offset 58h in the Stacker
	  device driver (except under DR DOS 3.41-5.0, which do not pass
	  through this call to the driver; use AX=440Eh instead)
	  (see AX=4404h"Stacker",AX=440Eh,INT 25/AX=CDCDh)
	this function was not supported by Digital Research's DOS Plus
SeeAlso: AX=4400h,AX=4404h"Stacker",AX=4409h,INT 2F/AX=122Bh
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