Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!zaphod.mps.ohio-state.edu!menudo.uh.edu!jetson.uh.edu!elee4fg From: elee4fg@jetson.uh.edu Newsgroups: comp.unix.aix Subject: AIX problems Message-ID: <9357.282caa94@jetson.uh.edu> Date: 12 May 91 07:38:12 GMT Organization: University of Houston Lines: 55 From: seng Gan Star Enterprise Here are the problems that I known about: I have AIX 3.1 running on 540 and 530. 540 and 530 each has 3 IBM 857MB internal harddisk and 2 external 1 GB harddisk. 1) csh does not support suid. If your csh suid scripts file has this #!/bin/csh It won't work. Your need to do this in ksh /bin/csh ( without #!/bin/csh ) 2) tar to 2.3 GB 8mm drive It is unreliable I have tar 2 GB of files to the tape and backup 1,400 of 1,600 files. It skip files (200). I have playing with this for 5 months. It does not works relialy. You better check your tape carefully. 3) cpio It skip files also. 4) printer attached to RS 422 port forget it. It dies every 4 hours. The queue daemon went out to lunch regularly. We used LPD print server software from FTP software running on PC as print server and use remote print queue. 5) Rs/6000 cannot telnet to SCO Xenix But can rlogin to SCO Xenix 6) Increase your process limit your need to edit /usr/include/sys/limits.h CHILD_MAX to increase your number of process allowed per user id in ksh 40 is too small for root chdev -l sys0 -A maxuproc has no effect in ksh 7) There is some strange limit to number of device attached to SCSI card Basically, if you have internal device attached to SCSI adapter you can only have one or two extenal device per adapter. It applies in 540 and 530 also in addition to 320. 8) inetd I let my rs/6000 PING EACH OTHER every hour. That seems to be the only way to keep it running constantly. 9) PC/TCP telnet to RS/6000 If the session did not terminate gracefully, it drive RS/6000 nuts. You will see sar command show system % time > user % time. ps -ef will show pts/? session that did not show up in w command ps au will show the session that eat away your CPU time. Call the user, he/she will say I am not login. kill the session, things will go back to normal. 10) RS/6000 (token ring TCP/IP) connect to Cisco Need to define static ARP route in Cisco to RS/6000 or else the link is not stable. I will post more problem as I discover them. Seng C, Gan Unix SysAdm Star Enterprise Tel:(713)874-7816 Call me if you know any more problem about TCP/IP that I am not aware of.