January 2006
Intermediate to advanced
226 pages
6h 11m
English
book
Linux for IBM System z9 and IBM zSeries
by Gregory Geiselhart, Robert Brenneman, Eli Dow, Klaus Egeler, Torsten Gutenberger, Bruce Hayden, Livio Sousa
Content preview from Linux for IBM System z9 and IBM zSeries
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Chapter 2. Linux 2.6 kernel 39
Figure 2-19 Using the dasdtune command
2.4.3 The dasdview command
The dasdview command displays DASD and VTOC information, and dumps
DASD content to the console (to dump DASD content, specify the start point and
offset and you can print the volume label and VTOC entries. Figure 2-20 uses the
dasdview command to list information for /dev/dasda.
Figure 2-20 Using the dasdview command
# tunedasd -g /dev/dasda
normal (0 cyl)
# echo set on > /proc/dasd/statistics
# tunedasd -c prestage -n 100 /dev/dasdc
WARNING: This is a very large number of cylinders ;) 100
Setting cache mode for device </dev/dasdc>...
Done.
# lsdasd
0.0.0200(ECKD) ...
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