Hi, Thanks for the information. It will be really handy to look on.
Regards, Jags On Sat, Apr 30, 2011 at 5:04 PM, John McKown <[email protected]> wrote: > In today's environment, the "mod number" is simply the size of the > device in cylinders (more or less). The original 3390 mod 3 had 3339 > cylinders. There was also a 3390-1 which had 1113 cylinders and a 3390-2 > which had 2226. The original mod 9 had 9*1113 or 10017 cylinders, but > was "slower" than the other 3390s. So, the convention more or less > became that a 3390-n device contained "n" time 1113 cylinders. Today the > "mod number" is basically meaningless because most DASD subsystems can > be set up to have disk with any number of 3390 format cylinders that you > want. I remember when we had EMC and "mini disks" which were only about > 200 cylinders for small, highly active datasets. That is no longer done > much because of PAV and HyperPAV volumes. It was done to get more > parallel I/O because, before PAV, you could only have one I/O active to > a DASD volume at a time. PAV allows multiple I/Os to be active to the > same volume by assigning multiple device numbers to the same logical > volume. > > So, to see how many "mod n" volumes you have, look at the total number > of cylinders on each volume. > > On Sat, 2011-04-30 at 09:33 +0530, jagadishan perumal wrote: > > Hi, > > > > Could anyone please let me know to verify that in the *DASD* Pool If i > have > > *Mod3* or Mod9. Also, I would like to know if its there any way to check > if > > any dasd Mods not in use. > > > > Could you please let me know if it requires more informations. > > > > Regards, > > Jags > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to [email protected] with the message: GET IBM-MAIN INFO > > Search the archives at http://bama.ua.edu/archives/ibm-main.html > -- > John McKown > Maranatha! <>< > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
