NAME

dump − capture the state of the memory for later analysis using crash(1M)

SYNOPSIS

Use the Prom Monitor to copy memory to the default dump device:
prom X> sysdump Reboot the system Use dd to copy unix and system dump to cartridge tape:
dd if=/unix of=/dev/rmtx bs=512k
dd if=/dev/dsk/c1d5s1 of=/dev/rmtXX bs=512k count=64

DESCRIPTION

Use the procedure given above to create a system dump. 

If UNIX is hung, attempt to interrupt UNIX by placing the lower key switch in the maintenance (vertical) position and then turning the upper key switch to the spring-loaded position to the right.  If this fails, reset the machine and request access to the Prom Monitor.  This is accomplished by:
Turning the lower key to the standard (horizontal) position. Turning the upper key to the spring loaded-position to the right. Then, within three seconds, turning the lower key to the maintenance (vertical) position. If the Prom Environment variable bootmode is not set and thereby disabling autoboot, only the first two steps are necessary.  Note: the above procedure may require two hands. 

Once the Prom Monitor has control, follow the procedure outlined in the synopsis.  Note than when coping UNIX to the tape one should use a non-rewind on close, high density tape device.  Then when coping the contents of the dump device to tape, one should specify a count which describes the size of main memory. 

The Prom Environment Variable dumpdev describes the default device which will be used by the Prom Monitor to hold the system dump.  The variable dumpdev is normally set to the swap partition. 

WARNINGS

The tape is by convention written in high density format and blocked in 512K byte blocks.  If convention has not been followed, please indicate the procedure used on the tape label. 

FILES

/dev/xxx -- high density no rewind on close cartridge tape device
/dev/xxx -- high density cartridge tape device

SEE ALSO

boot(7M), Titian Prom Manual

September 02, 1992