How to confirm hard drive ufsid before upgrade?
Hello. I recently upgraded 7 remote servers from FreeBSD 7.2 to 8.0. During the process, 3 servers had hard drive ufsid issues. Basically during the reboot between 7.2 to 8.0, the drive ids 'changed'. I'm using ufsids in fstab. All servers have two SCSI drives, but have all been set-up by different people that have come from a Linux background. I can only assume they have used different commands and methods to format the drives. I'm assuming this issue is related to GEOM_ changes, however it is not very clear how to prevent this from happening (I'm sure I'm missing something). I have one more machine to go which is a lot more critical than the others and do not wish to have this one down for as long as the others where. It took about 6 hours to get the tech guys at the other end to get 2 of the boxes back up, the other one was easy to get up, but all data was 'lost' on one drive and had to be restored from a back-up. -Tig ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Dual core CPU's, but only 2 CPU's in-use?
On Sun, 24 Feb 2008 15:59:49 +0100 Kris Kennaway [EMAIL PROTECTED] wrote: Tigger wrote: On Sun, 24 Feb 2008 12:46:23 +0100 Dominic Fandrey [EMAIL PROTECTED] wrote: Tigger wrote: Hello. I have a Xeon system with 2 CPU's installed (dual-cores). Under FreeBSD 6.2, a systat reported 4 CPUs in use and so did dmesg. Under FreeBSD 6.3, dmesg is reporting the 4 CPUs, but systat is only reporting 2 CPUs (CPU 0 and CPU 2). How do I enabled the second cores on the CPU's or are they really running but systat is not reporting the CPU load across the cores? You can run 'top -S' to check how many idle processes exist. If there are four, everything is fine. Sadly, no luck. Only cpu0 and cpu2 are reported: PID USERNAME THR PRI NICE SIZERES STATE C TIME WCPU COMMAND 11 root1 171 52 0K 8K CPU2 2 143:43 92.38% idle: cpu2 13 root1 171 52 0K 8K RUN0 142:33 92.04% idle: cpu0 Are your CPUs really dual-core, or single core + hyperthreaded? Kris Thank you! Your email sent me off to do what I should have done first - some research. I assumed (wrongly) that 'Logical CPUs per core: 2' meant 'Dual Core', and when I saw the following: FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs cpu0 (BSP): APIC ID: 0 cpu1 (AP): APIC ID: 1 cpu2 (AP): APIC ID: 6 cpu3 (AP): APIC ID: 7 I also thought 'Dual Core', however this is not the case. The CPU's are single core with Hyper Threading Tech. But this research has also lead to some confusion. Its clear there are 2 CPU with 2 Logical cores each, but only 2 cores are in use - why? Also, the 'man (4) smp' talks about (possible) performance issues with Hyper Threading enabled - does this mean I should set 'machdep.hlt_logical_cpus 1' (it is currently set to 0) - or because the Logical Cores are not being used I can forget about this? -Tig ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Dual core CPU's, but only 2 CPU's in-use?
On Mon, 25 Feb 2008 11:30:13 +0100 Kris Kennaway [EMAIL PROTECTED] wrote: Tigger wrote: On Sun, 24 Feb 2008 15:59:49 +0100 Kris Kennaway [EMAIL PROTECTED] wrote: Tigger wrote: On Sun, 24 Feb 2008 12:46:23 +0100 Dominic Fandrey [EMAIL PROTECTED] wrote: Tigger wrote: Hello. I have a Xeon system with 2 CPU's installed (dual-cores). Under FreeBSD 6.2, a systat reported 4 CPUs in use and so did dmesg. Under FreeBSD 6.3, dmesg is reporting the 4 CPUs, but systat is only reporting 2 CPUs (CPU 0 and CPU 2). How do I enabled the second cores on the CPU's or are they really running but systat is not reporting the CPU load across the cores? You can run 'top -S' to check how many idle processes exist. If there are four, everything is fine. Sadly, no luck. Only cpu0 and cpu2 are reported: PID USERNAME THR PRI NICE SIZERES STATE C TIME WCPU COMMAND 11 root1 171 52 0K 8K CPU2 2 143:43 92.38% idle: cpu2 13 root1 171 52 0K 8K RUN0 142:33 92.04% idle: cpu0 Are your CPUs really dual-core, or single core + hyperthreaded? Kris Thank you! Your email sent me off to do what I should have done first - some research. I assumed (wrongly) that 'Logical CPUs per core: 2' meant 'Dual Core', and when I saw the following: FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs cpu0 (BSP): APIC ID: 0 cpu1 (AP): APIC ID: 1 cpu2 (AP): APIC ID: 6 cpu3 (AP): APIC ID: 7 I also thought 'Dual Core', however this is not the case. The CPU's are single core with Hyper Threading Tech. But this research has also lead to some confusion. Its clear there are 2 CPU with 2 Logical cores each, but only 2 cores are in use - why? Also, the 'man (4) smp' talks about (possible) performance issues with Hyper Threading enabled - does this mean I should set 'machdep.hlt_logical_cpus 1' (it is currently set to 0) - or because the Logical Cores are not being used I can forget about this? hyperthreading is not enabled by default on 6.x. See the security advisory for discussion and how to enable it. Kris The only security advisory I could find was for 5.x and contained info on how to disable, not enable. http://security.freebsd.org/advisories/FreeBSD-SA-05:09.htt.asc Also, 'machdep.hlt_logical_cpus' is already set to 0 (I'm assuming the 'hlt' means 'halt' in the sysctl switch). -Tig ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Dual core CPU's, but only 2 CPU's in-use?
Hello. I have a Xeon system with 2 CPU's installed (dual-cores). Under FreeBSD 6.2, a systat reported 4 CPUs in use and so did dmesg. Under FreeBSD 6.3, dmesg is reporting the 4 CPUs, but systat is only reporting 2 CPUs (CPU 0 and CPU 2). How do I enabled the second cores on the CPU's or are they really running but systat is not reporting the CPU load across the cores? dmesg from 6.3 (snipped): CPU: Intel(R) Xeon(TM) CPU 2.80GHz (2790.73-MHz 686-class CPU) Origin = GenuineIntel Id = 0xf29 Stepping = 9 Features=0xbfebfbffFPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE Features2=0x4400CNXT-ID,xTPR Logical CPUs per core: 2 real memory = 2147352576 (2047 MB) avail memory = 2096242688 (1999 MB) ACPI APIC Table: DELL PE1600SC FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs cpu0 (BSP): APIC ID: 0 cpu1 (AP): APIC ID: 1 cpu2 (AP): APIC ID: 6 cpu3 (AP): APIC ID: 7 And sysctrl dev.cpu is interesting, the 4 CPUs are found but only 2 appear to be working (cx_usage is 100% or 0%): # sysctl dev.cpu dev.cpu.0.%desc: ACPI CPU dev.cpu.0.%driver: cpu dev.cpu.0.%location: handle=\_PR_.CPU0 dev.cpu.0.%pnpinfo: _HID=none _UID=0 dev.cpu.0.%parent: acpi0 dev.cpu.0.cx_supported: C1/0 dev.cpu.0.cx_lowest: C1 dev.cpu.0.cx_usage: 100.00% dev.cpu.1.%desc: ACPI CPU dev.cpu.1.%driver: cpu dev.cpu.1.%location: handle=\_PR_.CPU1 dev.cpu.1.%pnpinfo: _HID=none _UID=0 dev.cpu.1.%parent: acpi0 dev.cpu.1.cx_supported: C1/0 dev.cpu.1.cx_lowest: C1 dev.cpu.1.cx_usage: 0% dev.cpu.2.%desc: ACPI CPU dev.cpu.2.%driver: cpu dev.cpu.2.%location: handle=\_PR_.CPU2 dev.cpu.2.%pnpinfo: _HID=none _UID=0 dev.cpu.2.%parent: acpi0 dev.cpu.2.cx_supported: C1/0 dev.cpu.2.cx_lowest: C1 dev.cpu.2.cx_usage: 100.00% dev.cpu.3.%desc: ACPI CPU dev.cpu.3.%driver: cpu dev.cpu.3.%location: handle=\_PR_.CPU3 dev.cpu.3.%pnpinfo: _HID=none _UID=0 dev.cpu.3.%parent: acpi0 dev.cpu.3.cx_supported: C1/0 dev.cpu.3.cx_lowest: C1 dev.cpu.3.cx_usage: 0% Thanks for any pointers on this one! -Tig ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Dual core CPU's, but only 2 CPU's in-use?
On Sun, 24 Feb 2008 12:46:23 +0100 Dominic Fandrey [EMAIL PROTECTED] wrote: Tigger wrote: Hello. I have a Xeon system with 2 CPU's installed (dual-cores). Under FreeBSD 6.2, a systat reported 4 CPUs in use and so did dmesg. Under FreeBSD 6.3, dmesg is reporting the 4 CPUs, but systat is only reporting 2 CPUs (CPU 0 and CPU 2). How do I enabled the second cores on the CPU's or are they really running but systat is not reporting the CPU load across the cores? You can run 'top -S' to check how many idle processes exist. If there are four, everything is fine. Sadly, no luck. Only cpu0 and cpu2 are reported: PID USERNAME THR PRI NICE SIZERES STATE C TIME WCPU COMMAND 11 root1 171 52 0K 8K CPU2 2 143:43 92.38% idle: cpu2 13 root1 171 52 0K 8K RUN0 142:33 92.04% idle: cpu0 -Tig ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
unexpected result from sh script with `date`
Hello, the following simply sh script is outputting unexpected results. Any idea why? --script-- #!/bin/sh started=`date` echo Started at: $started echo Finished : `date` exit --output-- Started at: Fri Feb 2 22:13:51 EST 2007 Finished : Fri Feb 2 22:13:51 EST 2007 --problem-- Between 'Feb' and '2', there is two spaces on the 'Started at' line, however the 'Finished' one only has 1 space. I know this sounds picky, but I was not expecting this at all. uname -a FreeBSD piglet 6.2-STABLE FreeBSD 6.2-STABLE #0: Fri Jan 19 04:13:20 EST 2007 [EMAIL PROTECTED]:/usr/obj/usr/src/sys/PIGLET i386 -Tig ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
