VM Header Record for the Error Recording Area (Cylinder)

Table 1 shows an example of the VM header record for the error-recording area.

Table 1. VM Error Recording Cylinder Header Record
Offset Dec(Hex)	Size(bytes) Alignment(bits)	Field Name	Description
0(0)	4	RECCCPD	Address of this cylinder.
4(4)	2	RECNXT	Displacement to the next available space for records.
6(6)	1	RECFLAG1	Record usage flags:
	1... ....	RECPAGIU	The page contains valid data.
	.1.. ....	RECPAGFR	The page is cleared. This bit is set by EREP when it clears the error-recording area.
	..1. ....	RECPAGFL	The page is full. When this bit is set, a message is issued to the operator to clear the error-recording area.
	...1 ....	RECPAGER	The next page is unreadable.
	.... 1...	RECPAGFA	Frame records exist for this page.
	.... .xxx		Reserved.
7(7)	1	RECFLAG2	Record format flags:
	1... ....	RECPAGFM	The cylinder is being formatted. This bit is turned on in the first page of a recording cylinder while the cylinder is being formatted. The field is reset only when all pages are cleared.
	0000 0000	RECPAGDN	The cylinder has been formatted. If this field is nonzero, the cylinder is in the process of being formatted.