PS COMMAND HANG

We have solaris 2.3 ,on SS5 .We had a problem of ps command hangs with no output. This problem is solved by  removing a the file /dev/bd.off which has a zero sympolic link .
Anyone there  explain to me how this file got created ? and why ps hangs on the presence of zero sympolic link in /dev ?
ginawiAsked:
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avivlCommented:
Thr bd stream module processes the  byte streams generated by the SunButtons and Sundials dialbox.
If ps hangs remove bd.off and boot -r
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ginawiAuthor Commented:
Still i want more clarification on why ps command hangs.on other words what happens we we excute ps ?
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Unix OS

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