>From the web page that I previously posted about z/OS 1.10 <quote> Architectural limit of hundreds of TB for DASD volumes, up from the current limit of approximately 54 GB per volume. Called Extended Address Volume (EAV), this function is planned to initially support 223 GB per volume on z/OS V1.10 and IBM System Storage DS8000, when available. ... Exploiting the capabilities of a new 3390 device model on IBM System Storage DS8000 storage subsystems, EAV is designed to provide: A new architectural limit of hundreds of TB per volume, up from the current limit of approximately 54 GB per volume (65,520 cylinders). z/OS V1.10 will support a maximum volume size of 223 GB (262,668 cylinders per volume). Fully compatible access to data residing on cylinders below 65,520. Also, the existing 3390 device geometry (the track length and number of tracks per cylinder) is maintained on EAV. In z/OS V1.10, support is planned for SMS and non-SMS managed VSAM data sets (ESDS, KSDS, RRDS, and LDS) at any location on an extended address volume. Non-VSAM data sets, catalogs, page data sets, and VSAM data sets with the KEYRANGE or IMBED attribute are restricted to the first 65,520 cylinders. With this initial support, space after the first 65,520 cylinders is intended to provide constraint relief for applications using large VSAM data sets, such as those used by DB2, CICS(r), zFS file systems, SMP/E CSI data sets, and NFS mounted data sets. A new dynamic volume expansion function designed to eliminate the need to copy volumes to increase their size. This new function is expected to provide substantial, immediate constraint relief for installations with a large number of large VSAM data sets. This is also expected to help improve storage management administration over time, as a relatively small number of large volumes are thought to be simpler to manage than a larger number of smaller ones. IBM recommends the IBM HyperPAV licensed function on the IBM System Storage DS8000 series be leveraged to help manage the number of paths to devices defined as EAV.
In the future, IBM intends to expand support for EAV with larger volume sizes and support for additional data set types and access methods. For more information, refer to the Statement of direction section </quote> http://tinyurl.com/33l8em Man, oh man! We'll finally have parity with the other systems for truly huge volume sizes. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. ---------------------------------------------------------------------- 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
