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z/VM: CP Commands and Utilities Reference - z/VM - IBM

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performance, the type of channel programs that <strong>CP</strong> issues to the device should<br />

match the interface of the control unit to which it is attached. See the usage<br />

notes section for more details.<br />

units<br />

identifies the units of nnnnnnnnnn in the response for this volume. units is set to<br />

CYLINDERS for CKD devices <strong>and</strong> PAGES for FBA devices.<br />

nnnnnnnnnnn<br />

shows the number of cylinders or pages allocated in each category. For PAGE<br />

<strong>and</strong> SPOOL, when units is set to CYLINDERS, a cylinder is considered ″in use″<br />

when at least one page in it is in use. Calculating a percentage used - (INUSE *<br />

100) / (INUSE + AVAIL) - will therefore usually yield a larger <strong>and</strong> less accurate<br />

result than the percentage used shown in the following responses.<br />

<br />

appears on the DRCT response line if that volume contains the currently active<br />

user directory.<br />

<br />

appears on the TDISK, PAGE, or SPOOL response line if <strong>CP</strong> is currently not<br />

allocating space of that type on that volume.<br />

<br />

appears as the final response line if the volume containing the active IPL<br />

nucleus was one of those for which cylinder or page allocation information was<br />

displayed.<br />

Response 2:<br />

EXTENT EXTENT TOTAL PAGES HIGH %<br />

VOLID RDEV START END PAGES IN USE PAGE USED<br />

----- ---- ---------- ---------- ------ ------ ------ ----<br />

volid rdev nnnnnnnnnn nnnnnnnnnn pppppp pppppp pppppp ppp% <br />

nnnnnnnnnn nnnnnnnnnn pppppp pppppp pppppp ppp% <br />

nnnnnnnnnn nnnnnnnnnn pppppp pppppp pppppp ppp% <br />

volid rdev nnnnnnnnnn nnnnnnnnnn pppppp pppppp pppppp ppp% DUMP <br />

nnnnnnnnnn nnnnnnnnnn pppppp pppppp pppppp ppp% DUMP <br />

volid rdev - - - - - - SHARED<br />

volid rdev - - 0 0 0 0% NOT FOUND<br />

------ ------ ----<br />

SUMMARY pppppp pppppp ppp%<br />

usable pppppp pppppp ppp%<br />

DRAINING pppppp pppppp ppp%<br />

is the response for QUERY ALLOC PAGE <strong>and</strong> QUERY ALLOC SPOOL.<br />

volid<br />

is the volume identification of the <strong>CP</strong>-owned volume.<br />

rdev<br />

is the real device number of the <strong>CP</strong>-owned volume.<br />

QUERY ALLOC<br />

nnnnnn<br />

is the starting or ending cylinder or page number of the extent. For CKD<br />

volumes, this number is in cylinders. For FBA volumes, this number is in pages.<br />

The abbreviations K, M, G, T <strong>and</strong> P are used to indicate Kilo, Mega, Giga, Tera<br />

<strong>and</strong> Peta, for example, nnnnnK.<br />

pppppp<br />

is the total number of pages in the extent, the number of pages in use in the<br />

Chapter 2. <strong>CP</strong> <strong>Comm<strong>and</strong>s</strong> 689

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