Ah, yes, "DASD volumes"... (chuckles)
I spent a LOT of time doing AIX support-- both before p5 hypervisors and after-- so, really, what is a "DASD volume"? Is it a physical volume? (Which, using a hypervisor, may be mapped into a logical volume, or, via a SAN, is declared "physical" also despite being mapped across one-- or more-- actual physical devices.) Is it a logical volume? A logical volume at the hypervisor level looks like a physical volume to the instance which likely contains multiple logical volumes. With the abstraction of "volumes" the way they've been of late, the word, I believe, is becoming more and more ambiguous. Though, really, the query for free DASD -- "devices" -- implies physical volumes. Mind you, with the expanded use of SANs, all bets are off as to where the LUNs really map to. (sighs) As we move away from the good old days of 2311s, 2314s, 3330s, 3350s, when someone asks "What is a volume?", I believe the answer, more and more, becomes "It depends..." (smirks) -soup On Sun, Jun 22, 2014 at 1:46 PM, Mark Post <mp...@suse.com> wrote: > >>> On 6/22/2014 at 08:37 AM, John Campbell <soup...@gmail.com> wrote: > > Ah, yes, so Q DASD FREE will report on free space... but will it return > > CONTIGUOUS free space (ISTR minidisk granularity is in "cylinders")? Or > > will it just be the count of cylinders (or whatever "granularity" the > > device, like FBA, which might not be reported in cylinders) that haven't > > been allocated somewhere within the knowledge of the z/VM system? > > That command will only report entire DASD volumes. By definition, any > volume that has been used for minidisks is attached to SYSTEM, and will not > be shown. So, yes, as many contiguous cylinders as the volume contains. > > > Mark Post > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > -- John R. Campbell Speaker to Machines souperb at gmail dot com MacOS X proved it was easier to make Unix user-friendly than to fix Windows "It doesn't matter how well-crafted a system is to eliminate errors; Regardless of any and all checks and balances in place, all systems will fail because, somewhere, there is meat in the loop." - me ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
