1 07/30/87 disk_queue
 2 
 3 Syntax as a command: disk_queue {subsystem_name} {-control_args}
 4 
 5 
 6 Function: prints the entries from the disk read/write queue for some
 7           or all disk subsystems.
 8 
 9 
10 Arguments:
11 subsystem_name
12    is the name of a particular disk subsystem to print the queue for.
13    If none is specified, the queues for all configured disk subsystems
14    are printed.
15 
16 
17 Control arguments:
18 -long, -lg
19    print the long form of the information; the extra information
20    printed in this format is the time of the I/O request, the
21    cylinder address and the physical volume name of the drive.
22 -brief, -bf
23    print the normal (short) form of the information. (DEFAULT)
24 -all, -a
25    print all queue entries, both from the live queue and the processed
26    queue.
27 -live
28    print only the live queue entries; those for which the requested I/O
29    has not yet been completed. (DEFAULT)
30 
31 
32 -last N, -lt N
33    print the last (most recent) N entries from the queue of already
34    processed requests. To print all available processed queue entries,
35    any large value for N (such 100000) may be specified.
36 -erf N
37    print the disk queue from the FDUMP for ERF NNN.
38 -online
39    print the online disk queue. (DEFAULT)
40 -read
41    print information only for read requests. The default is to print
42    information for both read and write requests.
43 -write
44    print information only for write requests.
45 
46 
47 -record, -rec, -page, -pg
48    print information only for page (record) I/O requests. The default
49    is to print information for both page and VTOC I/O.
50 -sector, -sec, -vtoc
51    print information only for VTOC (sector) I/O requests.
52 
53 
54 Notes:
55    The drive name of the disk drive is printed for both -long and
56    -brief output formats.  In -long format the physical volume name is
57    also printed.  Due to synchronization between queuing and
58    processing of requests and ring 0 peeking disk_queue will
59    frequently list requests which are not for the subsystem of
60    interest and/or have already been processed.  If requests have
61    already been processed, and the used bit is off in the entry, the
62    queue chaining ceases for that drive and an informative message is
63    printed.  Queue chaining for other drives continues.