On Friday, 07/14/2006 at 11:45 MST, Mike Lee <[EMAIL PROTECTED]> wrote: > I would like to create a very large FBA disk (about 3,000,000 FBA 512 > blocks) on a FLEX system with z/VM 4.3 to accommodate a z/VSE 3.1 > system residence volume. However it appears that there is an > artificial or real limit in the DIRECTXA command since I get the > following error message: > > directxa user > z/VM USER DIRECTORY CREATION PROGRAM - VERSION 4 RELEASE 3.0 > MDISK 148 FB-512 16 2998984 VSEPKZ MR READ WRITE MWRITE > HCPDIR1762E INVALID BLOCK SPECIFICATION CODE = 12 FOLLOWING USER ZVSE > EOJ DIRECTORY NOT UPDATED > Ready(00002); T=0.11/0.15 11:26:53 > > Table 135 in the z/VM V3R1.0 Planning and Administration > states that the max minidisk size for FB-512 is 4,194,296 blocks. > Of course for 9336 the max size is smaller but has been enlarged > in the equivalent z/VM V5.1 manual. What have I missed?
The z/VM 4.3 manual (why are you looking in the 3.1 book?) specifically says that 4M blocks is for virtual disk in storage. There should actually be two lines in that table: one for V-DISK and one for FB-512 (equivalent to the largest 9336, a mod 20). So, for a "real" FBA device, z/VM 4.3 is limited to 1,672,881 blocks. CP VARY ON will not bring an FBA device online that has more than that many blocks. These limits were significantly raised in z/VM 5.1. If you want to play around, you can change the value of MAXFBA in HCPDVTYP COPY and reassemble HCPDIR and HCPIDT. No guarantees, of course. Alan Altmark z/VM Development IBM Endicott
