Specifications
Chapter 8. Problem handling 99
and head numbers. These numbers are in decimal. The following example lists the records on
cylinder 0, head 0 of volume Z9SYS1:
$ ckdPrint /z/Z9SYS1
DeviceType 3390, Cylinders-3339, Trks/Cyl-15, TrkSize-56832
Input extent in decimal - CC-low HH-low CC-high HH-high
00 00 00 00
....
....
The tapeCheck command may be used to verify the format of an awstape file. That is, this
command reads the awstape file and verifies that the awstape control blocks are logically
correct.
Special problem-related commands
The senderrdata command provides a menu of options:
1. rassummary (uses the Linux less command)
2. rassummary -s (for an overview of snapdump incidents)
3. FTP/dump snapdump data
4. FTP/dump PE directed files (used only at IBM request)
5. Create configuration information file
6. Logs Directory maintenance
7. FTP/dump rassummary created files
8. FTP/dump all files in logs directory
9. snapdump
The dump options in this menu mean that a tar file is created, containing the selected files,
and the tar file is saved in /tmp. The dump option (to create a tar file) is especially useful if the
1090 machine is not connected to the Internet.
A number of 1090 commands are intended to be used only at the direction of IBM support
personnel and they will supply the specific commands and operands to be used. This
category includes the following commands:
$ awslog (including --logsize and --logcount operands)
$ doOSAcmd (various subcommands)
$ dreg (shared resource registery)
$ dshrmem (shared memory)
$ printlog (only for some .gz logs)
$ printtrace (only for some .gz traces)
The contents and formats of the various log and trace files are not documented and are
intended only for diagnostic use. Our experience is that these files are not useful for solving
general user-level problems.
8.5 Linux monitoring
Some monitoring of Linux statistics may be helpful. The vmstat command is useful and
causes very little interference with other processes in Linux.
$ vmstat 3 4 (4 samples at intervals of 3 seconds)
procs -----------memory------------ ---swap--- -----io----- --system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
2 0 0 397600 101936 2398160 0 0 109 52 154 350 14 2 81 3