Don't you mean 5250 DSCBs? 1 for the first 5 extents on a PS, and 1 if any extents over 5 to the limit? Also you have to have a DSCB for each free space extent. My guess is your VTOC is full, because when you need another extent, you also need a free space record. https://en.wikipedia.org/wiki/Volume_Table_of_Contents
Here is the table of Maximum VTOC and VTOCIX sizes for various devices and 3380/3390 number of cylinders. EAVs would use the 64K cylinder size. https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.3.0/com.ibm.zos.v2r3.ickug00/ick40744.htm#ick40-gen745__mvtoc On Thu, Jul 11, 2019 at 8:47 PM Gibney, Dave <[email protected]> wrote: > > Is there a way to determine if and how much a VTOCIX is fragmented. Way back > when (when disk wasn't quite so cheap), we standardized on parking the VTOCIX > in the 14 tracks left in the 1st cylinder, and for a Mod-3, VTOC of 105 > tracks (7CYL) immediately following, and usually a 2 CYL VVDS right after > that. Most of my SMS managed application disks still follow this. And it > worked well for many years. > > But, during high volumes of SMTP activity, I have begun to get: > > IEC603I VTOC ERRORS MAY EXIST ON C465,PPRD22,8,027 > IEC331I 042-002(0812041B),SMTP ,SMTP ,RNAM,IGG0CLH2 > IEC331I VOL,PPRD22,NAME,SMTP.CONN257.NOTE > IGD17003I PERMANENT I/O ERROR ON VOLUME PPRD22 139 > FOR DATA SET SMTP.CONN257.NOTE > HISTORIC RETURN CODE IS 8 DADSM DIAGNOSTIC INFORMATION IS 0812041B > IGD306I UNEXPECTED ERROR DURING IGGDAR02 PROCESSING 140 > RETURN CODE 8 REASON CODE 27 > THE MODULE THAT DETECTED THE ERROR IS IGDVTSDA > SMS MODULE TRACE BACK - VTSDA VTSCU VTSCT VTSRN SSIRT > SYMPTOM RECORD CREATED, PROBLEM ID IS IGD00898 > IEC614I RENAME FAILED - RC 008, DIAGNOSTIC INFORMATION IS (0812041B), > 141 > SMTP,PPRD22,SMTP.CONN257.NOTE > EZA5544E Unable to RENAME file SMTP.CONN257.NOTE to SMTP.A0258454.NOTE > rc=408 > EZA5568E UNABLE TO ALLOCATE ADDRBLOK DATA SET CORRECTLY > > SMTP is playing a dataset rename game - SMTP.TEMP.NOTE to SMTP.CONNnnn.NOTE > (a 3 character length increase) > > SMTP then kindly sends a blank email to the recipient which then gets > reported as suspicious :) > > I don't remember how we reached the numbers we used, but looking at the info > the ICKDSF manual, the 14 track index should be large enough for the 5250 > datasets possible with a 105 track VTOC. I an wondering if I can REFORMAT > REFVTOC EXTINDEX(14) and get refreshed, unfragmented VTOCIX. > > Dave Gibney > Information Technology Services > Washington State University > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
