In <07b601cd8c4a$4065bbd0$c1313370$@mcn.org>, on 09/06/2012 at 09:11 AM, Charles Mills <charl...@mcn.org> said:
>> But don't PDS directory blocks have keys on disk? >I don't *think* so. Always has, always will. From z/OS DFSMS Using Data Sets. SC26-7410-09: 3.7.2 PDS Directory PDS member entries vary in length and are blocked into 256-byte blocks. Each block contains as many complete entries as will fit in a maximum of 254 bytes. Any remaining bytes are left unused and are ignored. Each directory block contains a 2-byte count field that specifies the number of active bytes in a block (including the count field). In Figure 110, each block is preceded by a hardware-defined key field containing the name of the last member entry in the block, that is, the member name with the highest binary value. Figure 110 shows the format of the block returned when using BSAM to read the directory. -- Shmuel (Seymour J.) Metz, SysProg and JOAT Atid/2 <http://patriot.net/~shmuel> We don't care. We don't have to care, we're Congress. (S877: The Shut up and Eat Your spam act of 2003) ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN