On 11 Feb 2010 05:37:17 -0800, john.mck...@healthmarkets.com (McKown, John) wrote:
>> Other computers didn't need the advantages of PDS's. Nor the >> disadvantages. > >Does anything other than S/360 derived systems even use CKD type DASD? PDS >directories are built around CKD. >And, in their day, moving the search logic out to the peripheral was probably >a good idea. We used to care about whether our disk was CKD. (And whether we called it DASD). And with different types of disks, we spent time figuring out sort work sizes, converting tracks and blocks etc. But these were all working around hardware design to a degree that other systems handled themselves. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
