"Top ROOT" is not a term I've run into before, although I understand what Lizette is using it for.
Before OS/390 V1.9 (not to confuse with z/OS V1.9), it was simply the "root file system". Then V1.9 introduced the syslpex sharing of file system and with this two new terms were coined: - The "Sysplex Root", which simply is the first file system mounted by the kernel. It's the point you reach by "cd /". There is only one sysplex root and all systems participating in "sysplex sharing of file systems" have it mounted as the top level filesystem. The sysplex root has a coulpe of "mount points" and a couple of sysbolic links but is empty otherwise. - The "Version Root" contains all the data (directories, files, etc.) that is delivered with each OS release. It is what has been called "root file system" before OS/390 V1.9. Some systems in the sysplex may share this file systems, some may have another "version" of it. The planning guide explains this all, although it problably more than one pass to get the idea. -- Peter Hunkeler CREDIT SUISSE Global Data Center Operations Print Processing Engineering / KIUK 3 Uetlibergstrasse 231 CH-8070 Zurich Phone +41 (0)44 332 2697 Fax +41 (0)44 332 4543 http://www.credit-suisse.com -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Chase, John Sent: Wednesday, October 22, 2008 4:28 PM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: How big is your z/OS 1.9 root and where does it live > -----Original Message----- > From: IBM Mainframe Discussion List On Behalf Of Lizette Koehler > > Peter, > > I totally agree with your statement, however, the descriptions and diagrams > are very nice in this manual. I am still going through the zOS v1.9 manuals > to see what has been enhanced. But my basic direction is to start at the > beginning of the yellow brick road and move forward. I find that sometimes > IBM drops really good information over time in manuals. > > Lizette > > > > > The real title is "OS/390 V2R7.0 UNIX System Services Planning". > > > > However, much had changed with respect to the root file system > > when support for "sharing HFSs in a sysplex" was added with > > OS/390 V1.9. It's better to consult a more recent version > > of the manual before "re-doing the root setup". Looks like Chapter 7 in the z/OS 1.9 UNIX System Services Planning manual has the "current" documentation for this. Presumably a similar chapter in the z/OS 1.10 manual as well. Since current intent here is to skip 1.10 and wait for 1.11, I'll study the 1.9 manual for now. "Top ROOT" is now "Sysplex ROOT"; similar changes to other nomenclature. Thanks, -jc- ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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
