FORMAT disk is erased. A read after write check is made as the disk is
formatted. For example:
format 191 a 25
initializes 25 cylinders of the disk located at virtaal address 191
in CMS format. The command:
format 192 b 25 (recomp)
changes the number of cylinders available at virtual address 192 to
25 cylinders, but does not erase any existing data. To change only
the label on a disk, you can enter:
format 193 c (label)
Respond to the prompting message with a six-character label.
3. If you want to format a minidisk for VSAM files, you must use the IBCDASDI program. If you want to format an entire disk, you may
use any OS or DOS disk initialization program.
4. Because the FORMAT command requires heavy processor utilization and
is heavily 1/0 bound, system performance may be if there
are many users on the system when you use FORMAT. 5. If the FORMAT command with the RECOMP option fails and eMS issues
message DMSFOF214W, "CANNOT RECOMPUTE WITHOUT LOSS OF DATA. NO CHANGE.", query your A-disk to determine the number of unallocated
cylinders. If the number of cylinders seems adequate, it is
possible that some of the allocated space is at the end of the disk
and is not available to the FORMAT command. Issue the command:
copy * * a = = = (rep oldd
followed by the FORMAT command with the RECOMP option. DMSFOR603R FORMAT WILL ERASE ALL FILES ON DISK 'mode(cuu) I. DO YOU WISH TO CONTINUE? (YES I NO) : You have indicated that a disk area is to be initialized: all
existing files are erased. This message gives you the option of
canceling the execution of the FORMAT command. Reply yes or no. DMSFOR605R ENTER DISK LABEL: You have requested that a label be written on the disk.
one- to six-character label. DMSFOR705I DISK REMAINS UNCHANGED. Enter a
The response to message DMSFOR603R was NO or a null line was
entered. DMSFOR732I 'nnn' CYLINDERS FORMATTED ON DISK 'mode(cuu)'
The format operation is complete. IBM tTU'")"''' v fit.J 1 V Command __ !I auu Macro Reference

FORMAT DMSFOR 1 33I FORMATTING DISK 'mode'
The disk represented by mode letter 'mode' is being formatted.
mode (CGu): nnnn FILES, nnnnn REC IN USE, nnnnn LEFT (of nnnnn) F nn% FULL (nnn CYL), type, R/W This message provides the status of a disk when you use the RECOMP option. The response is the same as when you issue the QUERY command with the DISK operand. DMSFOR003E INVALID OPTION 'option' RC=24 DMSFOR017E INVALID DEVICE ADDRESS 'cuu' RC=24 DMSFOR028E NO DEVICE SPECIFIED RC=24 DMSFOR037E DISK 'moder (cuu)]' IS READ/ONLY RC=36 INVALID MODE 'mode' RC=24 DMSFOR06
Q
E DISK 'mode' NOT ACCESSED RC=36 DMSFOR010E INVALID PARAMETER 'parameter' RC=24 DMSFOR113S DEVICE 'cuu' NOT ATTACHED RC=100 'cuu' IS AN UNSUPPORTED DEVICE TYPE RC=88 DMSFOR125S PERMANENT UNIT CHECK ON DISK 'mode(cuu)' RC=100 DMSFOR126S ERROR {READIWRITJING LABEL ON DISK 'mode(cuu)' RC=100 DMSFOR214W CANNOT RECOMPUTE WITHOUT LOSS OF DATA. NO CHANGE RC=8 Section 2. CMS Commands 99