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TRAP 3E<br />
Cause<br />
Ultra system fails to boot with TRAP 3E. The system sometimes also displays bad<br />
magic number errors.<br />
This is caused by a bad superblock on the boot disk. Which, in turn, could have beee<br />
caused by a SCSI configuration problem.<br />
Action<br />
To fix:<br />
1. Check SCSI bus for illegal configuration, bad cables, and duplicate SCSI addresses;<br />
2. Boot from cdrom in single user.<br />
OK boot cdrom -sw<br />
3. Attempt to fsck(1M) boot disk. This will probably fail with a superblock error.<br />
# fsck /dev/rdsk/device<br />
4. Find out locations of alternate superblocks. BE SURE TO USE AN UPPERCASE<br />
-N. For example:<br />
# newfs -N /dev/rdsk/c0t0d0s0<br />
/dev/rdsk/c0t0d0s0: 2048960 sectors in 1348 cylinders of 19 tracks,<br />
80 sectors 1000.5MB in 85 cyl groups (16 c/g, 11.88MB/g, 5696 i/g)<br />
super-block backups (for fsck -F ufs -o b=#) at:<br />
32, 24432, 48832, 73232, 97632, 122032, 146432, 170832, 195232, 219632,<br />
244032, 268432, 292832, 317232, 341632, 366032, 390432, 414832, 439232,<br />
463632, 488032, 512432, 536832, 561232, 585632, 610032, 634432, 658832,<br />
683232, 707632, 732032, 756432, 778272, 802672, 827072, 851472, 875872,<br />
900272, 924672, 949072, 973472, 997872, 1022272, 1290672, ...<br />
5. Using an alternate superblock, fsck(1M) the disk. You may have to try more than<br />
one alternate superblock to get this to work. Pick a couple from the beginning, the<br />
middle, and the end.<br />
# fsck -o b= /dev/rdsk/c0t0d0s0<br />
Alphabetical Message Listing 189