lixj@acf4.nyu.edu (Xiaojian Li) (04/16/91)
I asked the same question before but got no solution. I guess now that people have gathered more experiences, so here it is again. We get tight up on paging space. So we'd like to add a partition to the paging space. We know how to do it from an external drive. But since the internal disk that comes with the machine is supposed to be a fast one, we really want to have the extra paging space on that one. The internal disk hdisk0 has been partitioned into / /usr /tmp. We have about 100MB free on /usr, so we decided to free it up and get a partition out of it. But I CAN NOT EVEN UMOUNT IT! Is there any crucial file on /usr that it is not allowed to be touched? What will happen if I don't have /usr filesystem? (that needs to be the case, I may backup entire /usr, then distroy it, repartition, then restore). Thanks in advance for any help. Xiaojian
julie@levell.austin.ibm.com (Julie A. Levell) (04/16/91)
In article <1991Apr16.041508.12953@cmcl2.nyu.edu> lixj@acf4.nyu.edu (Xiaojian Li) writes: >disk hdisk0 has been partitioned into / /usr /tmp. We have about 100MB >free on /usr, so we decided to free it up and get a partition out of it. >But I CAN NOT EVEN UMOUNT IT! > >Is there any crucial file on /usr that it is not allowed to be touched? >What will happen if I don't have /usr filesystem? (that needs to be the >case, I may backup entire /usr, then distroy it, repartition, then restore). Well, usually the reason it won't let you unmount it is because /usr contains the messages, so if you have your LANG variable set to En_US then it has the catalogs in /usr/lpp/msg/En_US open. Also, if you don't have a /usr then you could run into problems in booting because /usr/lpp/fonts contains the fonts for the hft and /usr/bin/odmget is used at boot time to determine what the key position is that tells diagnostics to run or not. We've seen this problem before and it usually leads to a c99 in the LED. I would recommend shutdown -m after you've changed your LANG variable. >Xiaojian -- *=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*= Julie A. Levell IBM Austin, Texas Internet: julie@aixwiz.austin.ibm.com IBMNET: JULIEL at AUSVMQ 4C-29/994 SpeakNet: 823-5178 (Tie 793-5178) "Let's use the ODM Interface" Commander William Riker STTNG "The Nth Degree"
geoff@edm.uucp (Geoff Coleman) (04/17/91)
In article <6699@awdprime.UUCP> julie@levell.austin.ibm.com (Julie A. Levell) writes: >In article <1991Apr16.041508.12953@cmcl2.nyu.edu> lixj@acf4.nyu.edu (Xiaojian Li) writes: >>disk hdisk0 has been partitioned into / /usr /tmp. We have about 100MB >>free on /usr, so we decided to free it up and get a partition out of it. >>But I CAN NOT EVEN UMOUNT IT! >> You have to turn off the error daemon before you can unmount /usr! >>Is there any crucial file on /usr that it is not allowed to be touched? >>What will happen if I don't have /usr filesystem? (that needs to be the >>case, I may backup entire /usr, then distroy it, repartition, then restore). > >Well, usually the reason it won't let you unmount it is because /usr >contains the messages, so if you have your LANG variable set to >En_US then it has the catalogs in /usr/lpp/msg/En_US open. Unless these are in active use the O/S shouldn't care !!! > >Also, if you don't have a /usr then you could run into problems in >booting because /usr/lpp/fonts contains the fonts for the hft and >/usr/bin/odmget is used at boot time to determine what the key >position is that tells diagnostics to run or not. We've seen this problem >before and it usually leads to a c99 in the LED. > >I would recommend shutdown -m after you've changed your LANG variable. > >>Xiaojian > Why is odmget in /usr if it is necessary to the booting of the machine AIX must be the only UNIX where you need to have /usr accessible in order to boot it. The explanation from IBM was that they were add ons to the OS so they should be in /usr (I believe there are more O/S critical files than just odmget in /usr). Geoff Coleman > >-- >*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*= >Julie A. Levell IBM Austin, Texas Internet: julie@aixwiz.austin.ibm.com >IBMNET: JULIEL at AUSVMQ 4C-29/994 SpeakNet: 823-5178 (Tie 793-5178) >"Let's use the ODM Interface" Commander William Riker STTNG "The Nth Degree"