-----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Tom Marchant Sent: Wednesday, July 02, 2008 4:23 PM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: Another difference between platforms...
<snip> How much existing code would break? Example: PDS uses TTR in the directory to point to the member. Lots of code depends on TTR. <snip> The self answered question "What does you mean, Steve? " It is cheaper for IBM to continue with CKD emulated on FBA RAID than it is for them to put out a new DASD geometry, or handle FBA natively. [However, I thought there was a published interface for the channels so that if you wanted to attach your own device... And there is nothing that says your device can't be DASD.] So, how do you convert CCCCSS (CCCC = some number of cylinders, SS sector #) to TTR/TTTR? Since VSE supports it (long time ago I used to write // EXTENT... cards for FBA devices), how difficult would it be to port that support? Even VSAM and CATALOGS are kept on FBA. How difficult would it be to write (or under the covers, convert) CKD CCWs to FBA CCWs? For whatever reason, IBM has decided they do not want to invest the money in it. But, where are the 3390 disk drives they are making that SEAGATE $500 drives would kill the market for? Apparently, enough customers are not complaining loud enough to force the issue. Regards, Steve Thompson -- All opinions expressed by me are my own and may not necessarily reflect those of my employer. -- ---------------------------------------------------------------------- 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
